Report (8) Pzo/e-op/j.
/3/25 SW /091.4 BLVD
ADDENDUM TO CONTRACT DOCUMENTS
Project: City of Tigard Owner: City of Tigard
City Hall, Police, and Permit Center Re-Skin 13125 SW Hall Boulevard
13125 SW Hall Boulevard Tigard, Oregon 97223
Tigard, Oregon 97223
To: Plan Holders Architect: LRS Architects, Inc.
720 NW Davis Street, Suite 300
Portland, OR 97209
LRS Project No. 213060
City of Tigard Project No. 2014-91013
Date: May 22, 2014 Addendum No: 01
This Addendum forms a part of the Contract Documents and modifies the original Bidding Documents
dated May 6, 2014 Acknowledge receipt of this Addendum in the space provided on the Bid Form.
Failure to do so may subject the Bidder to disqualification.
PROJECT MANUAL
1.1 Document 00 0110: Table of Contents
Add: Section 06 1600: Sheathing
Add: Section 07 5423: Thermoplastic Membrane Roofing (TPO) (Alternate A)
Add: Section 08 6300: Metal Framed Skylights (Alternate A)
Add: Section 09 2400: Portland Cement Plastering (Alternate A)
Add: Section 09 2900: Gypsum Board
1.2 Section 01 4115: Design-Build Requirements
Add: Subparagraph 1.1.D.2, as follows:
2. Metal framed skylights (Alternate No. 1).
1.3 Section 06 1053: Miscellaneous Carpentry
Add: Subparagraph 1.1.A.2, as follows:
2. Framing with dimension lumber.
Add: Subparagraph 2.5.B.2, as follows:
2. Studs and Plates, Non-Load Bearing: Douglas Fir NLGA, WWPA, WCLIB
Stud Grade
City of Tigard Addendum No. 01
City Hall, Police and Permit Center Re-Skin
Add: Subparagraph 2.5.B.3, as follows:
3. Other Framing: Douglas Fir NLGA, WWPA, WCLIB
No. 2
1.4 Section 06 1600: Sheathing
Add: New Section 06 1600: Sheathing, per attachment.
1.5 Section 07 0145: Exterior Insulation and Finish System (EIFS) Restoration
Revise: Subparagraph 1.1.A.2, as follows:
2. Repair existing exterior insulation and finish system, including patching exterior
insulation and finish system where existing windows are removed.
Revise: Subparagraph 1.6.A.2, as follows:
2. Repair damage in existing insulation and patch exterior insulation and finish system
where existing windows are removed.
Add: Subparagraph 3.3.J, as follows:
J. Patch Exterior Insulation and Finish System where Existing Windows are Removed:
1. Procedure:
a. Install fasteners into structural substrate to attach exterior insulation and
finish system.
1) Use fasteners recommended by manufacturer of appropriate length
and type for the existing substrate.
2) Verify design wind loads for specific location of building to confirm
fastening pattern; minimum fastening pattern of 16 inches by 16
inches.
c. Install fasteners so that the washer surface is slightly below the plane of the
finish surface, but not more than 1/16 inch.
d. Embed a minimum 9 inch by 9 inch piece of detail mesh over each fastener
in base coat material and feather out edges onto surrounding surface.
1) Allow base coat to fully dry; minimum of 24 hours.
Revise: Subparagraph 3.4.B.2, as follows:
2. Install 20 oz. reinforcing mesh with "butt joints." Do not lap joints.
Add: Subparagraph 3.4.B.3, as follows:
3. Cover"butt joints" with 8 inch wide strip of 4 oz. detail reinforcing mesh prior to
applying texture coat.
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City of Tigard Addendum No. 01
City Hall, Police and Permit Center Re-Skin
1.6 Section 07 5423: Thermoplastic Membrane Roofing (TPO) (Alternate No. 1)
Add: New Section 07 5423: Thermoplastic Membrane Roofing (Alternate No. 1), per
attachment.
1.7 Section 08 6300: Metal Framed Skylights (Alternate No. 1)
Add: New Section 08 6300: Metal Framed Skylights (Alternate No. 1), per attachment.
1.8 Section 08 8000: Glazing
Add: Paragraph 1.1.B, as follows:
B. Related Sections:
1. Section 08 6300: Metal-Framed Skylights
Revise: Subparagraph 1.4.6.1, as follows:
1. GANA Publications: GANA's "Glazing Manual" and GANA Laminated Division's
"Laminated Glass Design Guide."
Add: Paragraph 1.7.6.3, as follows:
3. Laminated Glass: 5 year labor and materials to replace unit deterioration including
defects in edge separation, delaminating, obstruction vision through glass, and
blemishes exceeding those allowed in referenced standard.
Add: Paragraph 2.1.F, as follows:
F. Laminated Glass: ASTM C 1172, interlayer of clear polyvinyl butyral sheet, kind as indicated
in Glass Product Schedule.
Add: Paragraph 3.5.B, as follows:
B. Glass Type for Skylight: Laminated, single pane glass units complying with following
requirements:
1. Kind: LHS, consisting of two lites of heat-strengthened float glass.
2. Outer Lite: Class 1 (clear)float; minimum 3.0 mm thickness.
3. Inner Lite: Class 1 (clear)float; minimum 3.0 mm thickness.
4. Plastic Interlayer Thickness: 0.060 inch (1.52 mm), but not less than that required to
comply as a Type II safety glass material.
5. Plastic Interlayer Color: Clear.
1.9 Section 09 2400: Portland Cement Plastering
Add: New Section 09 2400: Portland Cement Plastering, per attachment.
1.10 Section 09 2900: Gypsum Board
Add: New Section 09 2900: Gypsum Board, per attachment.
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City of Tigard Addendum No. 01
City Hall, Police and Permit Center Re-Skin
1.11 Section 09 9000: Painting
Add: Subparagraph 1.1.13.4, as follows:
4. Section 09 2900: Gypsum Board,for substrate.
Add: Subparagraph 3.1.C.1.b, as follows:
b. Gypsum Board: 12 percent.
Revise: Article 3.9, as follows:
3.9 INTERIOR PAINT SCHEDULE
A. Provide minimum dry mil thickness of 3 mils, but in no case less than recommended by paint
Manufacturer, or as otherwise noted.
B. Provide gloss/sheen indicated in this schedule unless otherwise shown in Color Schedule.
C. Paint products followed with an * are acceptable products not MPI listed.
D. Primer: Gypsum Board, Concrete, Plaster:
1. First coat: Interior Latex Primer Sealer MPI #50.
Benjamin Moore: Natura Waterborne Interior Primer 511/K511.
Benjamin Moore: Fresh Start 100%Acrylic Superior Primer 046/K046.
Benjamin Moore: Eco Spec WB Interior Latex Primer N372/F372-00.
Benjamin Moore: Super Spec Premium Interior Latex Primer 253/K253.
Benjamin Moore: Ultra Spec 500 Waterborne Interior Primer Sealer N534/K534.
Benjamin Moore: Profinish Interior latex Primer Sealer PF05.
Coronado Paint: Super Kote 5000 Latex Primer-Sealer 40-11.
Kelly-Moore:Acry-Plex Int. PVA Primer/Sealer Low Odor/Low VOC 971-100.
Kelly-Moore:Acry-Plex Zero VOC Int. Wall Primer& Undercoat 973-10.
Miller Paint Co: MPI#50 Primer-Sealer MPI #50.
Miller Paint Co: Acro Pure Interior Primer 6440.*
PPG: Speedhide Interior Latex Sealer Quick-Drying 6-2.
PPG: Speedhide zero Interior Zero VOC Latex Sealer 6-4900.
Rodda Paint Co: Roseal Primer 507701.
Rodda Paint Co: Scotseal Primer 507801.
Rodda Paint Co: Roseal II Ultra Low VOC Primer 502701.
Sherwin Williams: Drywall Latex Primer B28W08100.
Sherwin Williams: Harmony Interior Latex Primer B11W00500.
Sherwin Williams: ProGreen 200 Interior Latex Primer B28W00600.
Sherwin Williams: ProMar 200 Int. Latex Primer B28W8200.
Sherwin Williams: ProMar 200 Zero Interior Latex Primer B28W02600.
Sherwin Williams: ProMar 400 Primer Interior Latex Primer B28W08400.
Sherwin Williams: Quali-Kote Interior Latex Primer B28WB1.
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City of Tigard Addendum No. 01
City Hall, Police and Permit Center Re-Skin
E. Finish Coats: Gypsum Board: (Acrylic)
1. Second and Third Coats: Interior Latex Eggshell MPI#52
Benjamin Moore: Eco Spec WB Interior Latex Eggshell N374/F374.
Benjamin Moore: Ultra Spec 500 Waterborne Interior Eggshell N538/K538.
Coronado Paint: Super Kote 5000 Interior Eggshell Enamel 30 Line.*
Kelly-Moore: Acry-Plex Interior Acrylic Eggshell Enamel 1610-121.
Kelly-Moore: Dura-Poxy 100% Eggshell Acrylic Enamel 1686-121.
Kelly-Moore: KM Professional Interior Acrylic Eggshell Enamel 1010-121.
Kelly-Moore: KM Professional Green Coat Zero VOC Int. Latex Eggshell Enamel
2010-121.
Miller Paint Co: MPI #52 Premium Satin Latex MPI #52.
Miller Paint Co: Acro Pure Interior Eggshell 4650. (VOC 0— Low Odor)
PPG: Speedhide Interior Satin Acrylic Latex 6-3511.
Rodda Paint Co: Rodda Paint Lasyn EggShell 533001.
Sherwin Williams: Builder Solution Interior Latex Eg-Shel A62W00051.
Sherwin Williams: ProGreen 200 Low Odor Low VOC Interior Eg-Shel B20W00651.
Sherwin Williams: ProGreen 200 Low Odor Low VOC Interior Eg-Shel B20W00651.
Sherwin Williams: ProMar 200 Zero VOC interior Latex Eg-Shel B20W02651.
2. MPI Gloss Level 3: `Eggshell-like'finish; gloss of 10-25 units at 60 degrees.
Add: Article 3.10, as follows:
3.10 PAINT AND COLOR SCHEDULE
A. Provide gloss/sheen indicated in this schedule meeting parameters of gloss/sheen indicated
in Paragraph 1.4B, of products, or equivalent products, specified in Paint Schedules above.
B. Color: As selected by Architect from manufacturer's full range.
DRAWINGS
1.12 Drawing CS
Revise: As indicated in Drawing CS dated 5-22-14, per attachment.
1.13 Drawing A301
Revise: As indicated in Drawing A301 dated 5-22-14, per attachment.
1.14 Drawing A302
Add: Drawing A302 dated 5-22-14, per attachment.
1.15 Drawing A401
Revise: As indicated in Drawing A401 dated 5-22-14, per attachment.
1.16 Drawing A402
Revise: As indicated in Drawing A402 dated 5-22-14, per attachment.
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City of Tigard Addendum No. 01
City Hall, Police and Permit Center Re-Skin
1.17 Drawing A501A
Revise: As indicated in Drawing A501A dated 5-22-14, per attachment.
1.18 Drawing A501 B
Revise: As indicated in Drawing A501 B dated 5-22-14, per attachment.
1.19 Drawing A501C
Revise: As indicated in Drawing A501C dated 5-22-14, per attachment.
1.20 Drawing A502
Add: Drawing A502 dated 5-22-14, per attachment.
1.21 Drawing A503
Add: Drawing A503 dated 5-22-14, per attachment.
1.22 Drawing S100
Add: Drawing S100 dated 5-22-14, per attachment.
ATTACHMENTS
Specifications:
Section 06 1600: Sheathing
Section 07 5423: Thermoplastic Membrane Roofing (TPO) (Alternate A)
Section 08 6300: Metal Framed Skylights (Alternate A)
Section 09 2400: Portland Cement Plastering (Alternate A)
Section 09 2900: Gypsum Board
Drawings: Full Size.
CS A301 A302 A401 A402 A501A A501B A501C
A502 A503 S100
END OF ADDENDUM NO. 01
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City of Tigard [ADDM. 01] Sheathing: 06 1600
City Hall, Police and Permit Center Re-Skin Page 1
May 22, 2014
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes:
1. Wall sheathing.
2. Sheathing joint and penetration treatment.
3. Weather barrier.
1.2 SUBMITTALS
A. Product Data: For each type of process and factory fabricated product.
1.3 DELIVERY, STORAGE, AND HANDLING
A. Stack panels flat with spacers between each bundle to provide air circulation. Provide for air
circulation around stacks and under coverings
PART 2 PRODUCTS
2.1 GYPSUM SHEATHING
A. Weather-Resistant Gypsum Wall Sheathing:
1. Glass-Mat Gypsum Wall Sheathing, ASTM C 1177, Type X; 5/8 inch thickness,
unless otherwise noted.
a. CertainTeed Corporation.: "GlasRoc."
b. Georgia-Pacific Corporation: "Dens-Glass Gold."
c. National Gypsum: "Gold Bond BRAND e2XP Extended Exposure Gypsum
Sheathing".
d. Temple-Inland: "GreenGlass Exterior Sheathing".
e. United States Gypsum Company: "Securock Glass-Mat Sheathing".
2. Cellulose Fiber-Reinforced Gypsum Wall Sheathing,ASTM C 79 and C 1278,
Type X; 5/8 inch thickness, unless otherwise noted.
a. United States Gypsum Company: "Fiberock Sheathing with Aqua-Tough."
2.2 FASTENERS
A. Wall Sheathing:Hot-dip zinc coated complying with ASTM A 153 or Type 304 stainless steel.
B. Nails, Brads, and Staples: ASTM F 1667.
C. Wood Screws:ASME B18.6.1.
D. Power Driven Fasteners: NES NER-272.
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2.3 SHEATHING JOINT AND PENETRATION TREATMENT MATERIALS
A. Sealant for Glass-Mat Gypsum Sheathing Board: Silicone emulsion sealant complying with
ASTM C 834, compatible with sheathing tape and sheathing, and recommended by tape and
sheathing manufacturers for use with glass-fiber sheathing tape and for covering exposed
fasteners.
B. Sheathing Tape for Glass-Mat Gypsum Sheathing Board: Self-adhering glass-fiber tape,
minimum 2 inches wide, 10 by 10 or 10 by 20 threads/inch, of type recommended by tape and
sheathing manufacturers for use with silicone emulsion sealant in sealing joints in glass-mat
gypsum sheathing board.
2.4 WEATHER BARRIER
A. Building Paper: Water-vapor-permeable, kraft building paper, except that water resistance
shall not be less than 1 hour and water-vapor transmission shall not be less than 75 g/sq. m x
24 h, meeting requirements of IBC Section 1404.2 as an alternate weather-resistive barrier.
1. Product: Fortifiber Building System Group"Super Jumbo Tex 60 Minute."
PART 3 EXECUTION
3.1 EXAMINATION
A. Verify edge blocking is in place and located properly prior to installation of sheathing.
3.2 INSTALLATION,'GENERAL
A. Do not use materials with defects that impair quality of sheathing or pieces that are too small
to use with minimum number of joints or optimum joint arrangement.
B. Cut panels at penetrations, edges, and other obstructions of work; fit tightly against abutting
construction, unless otherwise indicated.
C Securely attach to substrate by fastening as indicated, complying with the following:
1. NES NER-272 for power-driven fasteners.
2. Table 2304.9.1, "Fastening Schedule," in State of Oregon Structural Specialty Code
based on International Building Code.
D. Use common wire nails, unless otherwise indicated.
1. Select fasteners of size that will not fully penetrate members where opposite side will
be exposed to view or will receive finish materials.
2. Make tight connections.
3. Install fasteners without splitting wood.
E. Coordinate wall sheathing installation with flashing and joint sealant installation so these
materials are installed in sequence and manner that prevent exterior moisture from passing
through complete assembly.
F. Do not bridge building expansion joints; cut and space edges of panels to match spacing of
structural support elements.
LRS Architects, Inc.
City of Tigard [ADDM. 01] Sheathing: 06 1600
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G. Coordinate sheathing installation with installation of materials installed over sheathing,
including weather barriers specified in Section 07 2500, so sheathing is not exposed to
precipitation or left exposed at end of the workday when rain is forecast.
1. Do not exceed manufacturer's exposure warranty, as follows:
a. Cellulose Fiber-Reinforced Gypsum Sheathing Board: 12 months
b. Glass-Mat Gypsum Wall Sheathing Board: 6 months.
3.3 GYPSUM SHEATHING INSTALLATION
A. Comply with GA-253 and with manufacturer's written instructions.
1. Apply 48 inch wide sheathing vertically.
2. Nail or screw to wood framing.
3. Install boards with a 3/8 inch gap where non-load bearing construction abuts
structural elements.
4. Install boards with a 1/4 inch gap where they abut masonry to prevent wicking.
5. Back panel edges with minimum 2 by 4 wood blocking, or with same framing material
used for support of wall sheathing.
6. Fastening Gypsum Sheathing:
a. Wood Framing: Space fasteners 8 inches o.c. in panel field and 4 inches at
perimeter.
b. Set fasteners back 3/8 inch from edges and ends of units.
c. Screws: Use No. 6, Type S or S-12,wafer or bugle head, self-tapping and
corrosion resistant, 1-1/4 inches long.
3.4 WEATHER BARRIER INSTALLATION
A. Install in accordance with manufacturer's instructions.
1. Run horizontally, shingle fashion.
2. Lap 4 inches horizontally and 12 inches vertically.
3. Fasten to sheathing with galvanized staples or roofing nails.
4 Seal seams, edges, fasteners, and penetrations with tape.
3.5 CORRECTION OF DEFECTIVE WORK
A. Remove and replace sheathing panels with edges split or damaged by fasteners.
END OF SECTION
LRS Architects, Inc.
City of Tigard [ADDM. 01] Thermoplastic Membrane Roofing (TPO) (Alternate A): 07 5423
City Hall, Police and Permit Center Re-Skin Page 1
May 22, 2014
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes:
1. Mechanically attached thermoplastic polyolefin (TPO) membrane roofing system,
complete with accessories.
2. Roof insulation.
B. Related Sections:
1. Section 01 2300:Alternates,for Work of Alternate A.
2. Section 01 4500: Quality Control, for inspection procedures required by
manufacturer's technical representative.
3. Section 06 1053: Miscellaneous Carpentry, for wood blocking, curbs, and nailers.
4. Section 07 6000: Flashing and Sheet Metal, for metal roof penetration flashings,
flashings, and counterflashings.
1.2 DEFINITIONS
A. TPO: Thermoplastic polyolefin.
B. Roofing Terminology: Refer to ASTM D 1079 and glossary of NRCA's 'The NRCA Roofing
and Waterproofing Manual"for definitions of terms related to roofing work in this Section.
1.3 SYSTEM DESCRIPTION
A. TPO membrane mechanically attached over insulation and insulation cover board on steel
deck, with base flashing, crickets, counterflashing, and all incidentals for a manufacturer's
approved and warrantable assembly.
1.4 SUBMITTALS
A. Product Data: For each type of product indicated.
B. Shop Drawings: For roofing system. Include plans, elevations, sections, details, and
attachments to other work.
1. Base flashings and membrane terminations.
2. Tapered insulation, including slopes.
3. Roof plan showing orientation of steel roof deck and orientation of membrane roofing
and fastening spacings and patterns for mechanically fastened membrane roofing.
4. Insulation fastening patterns for corner, perimeter, and field-of-roof locations.
C. Applicator Qualifications: Submit the following written documentation:
1. Applicator's qualifications including evidence that applicator is licensed or approved
by the manufacturer.
2. Listing of five successfully completed projects similar in scope and complexity to work
of this Section with current phone numbers of Architect and Owner contacts for
verification.
3. Copy of designated project foreman's training certification by manufacturer.
D. Manufacturer's Installation Instructions: Indicate special procedures, perimeter conditions
requiring special attention, and special precautions required for seaming membrane and
fastening.
LRS Architects, Inc.
City of Tigard [ADDM. 01] Thermoplastic Membrane Roofing (TPO) (Alternate A): 07 5423
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E. Manufacturer's Certificate: Signed by roofing manufacturer certifying that roofing system
meets or exceed specified requirements.
F. Manufacturer's Field Reports: Submit under provisions of Section 01 4500 indicating
procedures followed, ambient temperatures, humidity, wind velocity during application, and
supplementary instructions given.
G. Maintenance Data: For roofing system to include in maintenance manuals.
H. Warranty: Sample of special warranty.
1.5 QUALITY ASSURANCE
A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual, manufacturer's
instructions, and as specified.
B. Installer Qualifications and Requirements:
1. Company specializing in performing the Work of this Section with minimum five years
documented experience and licensed or approved by manufacturer.
2. Applicator shall designate a single individual as project foreman who shall be on site
at all times during installation and who shall have certification of training by roofing
system manufacturer.
C. Comply with applicable State, and local codes for roof assembly fire hazard requirements.
1.6 PRE-INSTALLATION CONFERENCE
A. Convene minimum of one week prior to commencing work of this Section.
1. Include Contractor, roofing applicator, Owner's representative,Architect,
manufacturer's representative, and applicable subcontractors.
B. Review installation procedures and coordination required with related Work.
1. Record discussions and agreements, and furnish copy to each participant.
1.7 DELIVERY, STORAGE, AND HANDLING
A. Deliver products in manufacturer's original containers, undamaged,with seals unbroken and
labeled with manufacturer's name, product brand name and type, date of manufacture,
approval or listing agency markings, and directions for storage and mixing with other
components.
B. Store products in weather protected environment, clear of ground and moisture.
1. Protect liquid material and roof insulation from direct sunlight exposure.
2. Stand roll materials on end.
1.8 PROJECT CONDITIONS
A. Weather Limitations: Proceed with installation only when existing and forecasted weather
conditions permit roofing system to be installed according to manufacturer's written
instructions and warranty requirements.
LRS Architects, Inc.
City of Tigard [ADDM. 01] Thermoplastic Membrane Roofing (TPO) (Alternate A): 07 5423
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B. Do not apply roofing membrane to damp or frozen deck surface; do not begin work until
surfaces are sufficiently dry to receive new work.
C. Do not expose materials vulnerable to water or sun damage in quantities greater than can be
rendered watertight during the same day.
D. Refrain from roofing operations when wind velocity is sufficiently high to lift roofing membrane
sheets and pose a danger to workers.
1.9 SEQUENCING AND SCHEDULING
A. Coordinate Work of installing associated metal flashings as the work of this Section proceeds.
1.10 WARRANTY
A. Special Warranty: Manufacturer's standard or customized form, without monetary limitation, in
which manufacturer agrees to repair or replace components of membrane roofing system
manufacturer that fail in materials or workmanship within specified warranty period. Failure
includes roof leaks.
1. Warranty includes membrane roofing, base flashings, roof insulation, fasteners, cover
boards, roofing accessories, and other components of membrane roofing system.
2. Warranty Period: 15 years from date of substantial completion.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Subject to compliance with requirements, provide roofing systems of one of the following:
1. Carlisle SynTec Incorporated.
2. Firestone Building Products Company.
3. GAF Materials Corporation.
4. Johns Manville.
5. Versico Incorporated.
2.2 PERFORMANCE REQUIREMENTS
A. General Performance: Install membrane roofing and base flashings to withstand uplift
pressures, thermally induced movement, and exposure to weather without failure due to
defective manufacture, fabrication, installation, or other defects in construction. Membrane
roofing and base flashings shall remain watertight.
B. Material Compatibility: Provide roofing materials that are compatible with one another under
conditions of service and application required.
C. FM Approvals Listing: Provide membrane roofing, base flashings, and component materials
that comply with requirements in FM Approvals 4450 and 4470 as a part of a membrane
roofing system, and that are listed in FM Approvals' "RoofNav"for Class 1 or noncombustible
construction, as applicable. Identify materials with FM Approvals markings.
1. Fire/Windstorm Classification: Class IA-90.
2. Hail Resistance: MH.
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2.3 TPO MEMBRANE ROOFING
A. Fabric-Reinforced Thermoplastic Polyolefin Sheet:ASTM D 6878, internally fabric or scrim
reinforced, uniform, flexible TPO sheet.
1. Thickness: 60 mil nominal (0.060 inch)
2. Exposed Face Color: As selected from manufacturer's full range.
2.4 AUXILARY MEMBRANE ROOFING MATERIALS
A. General: Auxiliary membrane roofing materials recommended by roofing system
manufacturer for intended use, and compatible with membrane roofing.
1. Liquid-type auxiliary materials shall comply with VOC limits of authorities having
jurisdiction
B. Counterflashing: Metal, as specified in Section 07 6000.
C. Sheet Flashing: Manufacturer's standard unreinforced thermoplastic polyolefin sheet flashing,
minimum 55 mils thick, of same color as sheet membrane.
D. Flexible Membrane Flashing: Rubberized asphalt, reinforced, self-adhering membrane,
minimum 40 mil thickness.
E. Wood Nailer Strips: Furnish preservative treated wood nailer strips complying with
requirements of Section 06 1053.
1. Perlite and wood fiber cants may only be used by specific approval of Architect in
installations where cants are not required to be fastened to roof deck as
recommended in FMG 1-49 Loss Prevention Data Sheet for Perimeter Flashing.
F. Fasteners: Factory coated steel fasteners and metal or plastic plates complying corrosion
resistance provisions of Factory Mutual 4470, designed for fastening membrane to substrate,
and acceptable to membrane roofing system manufacturer.
G. Termination Bar: As recommended by system manufacturer.
H. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet
fleshings, preformed inside and outside corner sheet fleshings, T-joint covers, lap sealants,
termination reglets, and other accessories.
2.5 ROOF INSULATION
A. General: Preformed roof insulation boards manufactured or approved by TPO membrane
roofing manufacturer, selected from manufacturer's standard sizes suitable for application, of
thicknesses indicated.
B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class I, Grade 3, felt or glass-fiber
mat facer on both major surfaces.
1. Compressive Strength per ASTM D 1621: 25 lbs psi.
2. Size: Maximum 4 by 4 foot sheet.
C. Tapered Insulation: Provide factory-tapered insulation boards fabricated to form slopes
indicated.
LRS Architects, Inc.
City of Tigard [ADDM. 01] Thermoplastic Membrane Roofing (TPO) (Alternate A): 07 5423
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D. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where
indicated for sloping to drain. Fabricate to form slopes indicated.
2.6 INSULATION ACCESSORIES
A. General: Preformed roof insulation accessories recommended by insulation manufacturer, for
intended use and compatibility with membrane roofing.
B. Fasteners: Factory coated steel fasteners and metal or plastic plates complying corrosion
resistance provisions of Factory Mutual 4470, designed for fastening roof insulation and
insulation cover board to substrate, and acceptable to roofing system manufacturer.
C. Insulation Cover Board: Acceptable products:
1. G-P Gypsum Corporation: ASTM C 1177, glass mat faced water-resistant gypsum
board, 1/4 inch thick; DensDeck Roof Board.
2. USG: ASTM C 1278, fiber-reinforced water-resistant gypsum board, 1/4 inch thick;
Securock Roof Board.
3. Johns Manville: ASTM C 1289, Type II, Class 2, mineral-surfaced fiber glass-
reinforced high-density plyisocyanurate,1/4 inch thick; Invinsa Roof Board.
PART 3 EXECUTION
3.1 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, for compliance with the
following requirements and other conditions affecting performance of roofing system:
1. Verify roof openings and penetrations are in place and curbs are set and braced and
that roof drain bodies are securely clamped in place.
2. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at
penetrations and terminations and that nailers match thickness of insulation.
3. Verify that surface place flatness and fastening of steel roof deck complies with
requirements specified for steel decking.
4. Verify deck surfaces are dry and free of snow or ice.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION AND COORDINATION
A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing
installation according to roof system manufacturer's written instructions. Remove sharp
projections.
B. Prevent materials from entering and clogging roof drains and conductors and from spilling or
migrating onto surfaces of other construction. Remove roof-drain plugs when no work is
taking place or when rain is forecast
C. Coordinate with Work of other Sections to assure proper and adequate provision for interface
with Work or this Section.
LRS Architects, Inc.
City of Tigard [ADDM. 01] Thermoplastic Membrane Roofing (TPO) (Alternate A): 07 5423
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3.3 INSULATION INSTALLATION
A. Coordinate installing membrane roofing system components so insulation is not exposed to
precipitation or left exposed at the end of the workday
1. Remove and replace insulation that has become wet or damaged from improper
temporary edge seal or as result of inclement weather conditions.
B. Comply with membrane roofing system and insulation manufacturer's written instructions for
installing roof insulation.
C. Install tapered insulation under area of roofing to conform to slopes indicated.
D. Install insulation with long joints of insulation in a continuous straight line with end joints
staggered between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4
inch with insulation.
1. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations.
E. Mechanically Fastened Insulation: Install each layer of insulation and secure to deck using
mechanical fasteners specifically designed and sized for fastening specified board-type roof
insulation to deck type.
1. Fasten insulation according to requirements in FM Approvals'"RoofNav"for specified
Windstorm Resistance Classification.
2. Fasten insulation to resist uplift pressure at corners, perimeter, and field of roof
3. Tape joints of Insulation when recommended by insulation or membrane
manufacturer.
F. Install cover boards over insulation with long joints in continuous straight lines with end joints
staggered between rows. Offset joints of insulation below a minimum of 6 inches in each
direction. Loosely butt cover boards together and fasten to roof deck.
1. Fasten cover boards according to requirements in FM Approvals' "RoofNav"for
specified Windstorm Resistance Classification.
2. Fasten cover boards to resist uplift pressure at corners, perimeter, and field of roof
3.4 MECHANICALLY FASTENED MEMBRANE ROOFING INSTALLATION
A. Install mechanically fastened membrane roofing according to roofing system manufacturer's
written instructions.
B. Start installation of membrane roofing in presence of roofing system manufacturer's technical
personnel.
C. Roll out membrane free from wrinkles or tears. Allow sheet to relax for a minimum of 30
minutes before installing.
D. Accurately align membrane roofing, and maintain uniform side and end laps of minimum
dimensions required by manufacturer. Stagger end laps.
E. Mechanically fasten or adhere membrane roofing securely at terminations, penetrations, and
perimeter of roofing.
F. Apply roofing sheet with side laps shingled with slope of roof deck where possible.
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G. Seams: Clean seam areas, overlap membrane roofing, and hot-air weld side and end laps of
membrane roofing and sheet flashings according to manufacturer's written instructions to
ensure watertight seam installation.
1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut
edges of sheet membrane.
2. Verify field strength of seams a minimum of twice daily and repair seam sample
areas.
3. Repair tears, voids, and lapped seams in roofing that does not comply with
requirements.
H. Spread sealant bed over deck drain flange at roof drains and securely seal membrane roofing
in place with clamping ring.
3.5 FLASHINGS AND ACCESSORIES INSTALLATION
A. Install sheet flashings and performed flashing accessories and adhere to substrates
according to membrane roofing system manufacturer's written instructions.
B. Apply sheet flashing to seal membrane to vertical elements; extend sheet flashing a minimum
of 8 inches above top of roof plane.
1. Apply bonding adhesive to substrate and underside of sheet flashing at required rate
and allow to partially dry. Do not apply to seam area of flashing
C. Flash penetrations and field-formed inside and outside corners with cured or uncured sheet
flashing.
D. Clean seam areas, overlap, and firmly roll sheet flashings into the adhesive. Hot-air weld side
and end laps to ensure a watertight seam installation
E. Terminate and seal top of sheet flashings.
F. Coordinate installation of roof drains, sumps, overflows, and related flashing to NRCA
recommendations.
1. Taper sumped areas.
3.6 FIELD QUALITY CONTROL
A. Field inspection will be performed by roofing system manufacturer's technical representative
by periodic observation of work in progress.
1. The representative, as a minimum, shall be present to observe the deck preparation,
general installation procedures, and final completion.
B. Repair or remove and replace components of membrane roofing system where inspections
indicate that they do not comply with specified requirements.
C. Additional inspections, at Contractor's expense, will be performed to determine compliance of
replaced or additional work with specified requirements.
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3.7 PROTECTING AND CLEANING
A. Protect membrane roofing system from damage and wear during remainder of construction
period. When remaining construction will not affect or endanger roofing, inspect roofing for
deterioration and damage, describing its nature and extent in a written report, with copies to
Architect and Owner.
B. Correct deficiencies in or remove membrane roofing system that does not comply with
requirements, repair substrates, reinstall roofing system, and repair base flashing to a
condition free of damage and deterioration at the time of Substantial Completion and
according to warranty requirements.
C. Clean overspray and spillage from adjacent construction using cleaning agents and
procedures recommended by manufacturer of affected construction.
END OF SECTION
LRS Architects, Inc.
City of Tigard [ADDM. 01] Metal Framed Skylights (Alternate A): 08 6300
City Hall, Police and Permit Center Re-Skin Page 1
May 22, 2014
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes:
1. Skylight frames, glazing support plates.
2. Structural design of skylight frames and glass.
3. Watertight interface with building.
B. Related Sections:
1. Section 01 2300: Alternates,for Work of Alternate A.
2. Section 07 6000: Flashing and Sheet Metal
3. Section 07 9200: Joint Sealants
4. Section 08 8000: Glazing, for glass installed in metal framed skylights.
1.2 SUBMITTALS
A. Product Data: Manufacturer's specifications, including construction details, material
descriptions, dimensions of individual components and profiles, and finishes.
B. Shop drawings: Include plans, elevations, sections, details, and attachments to other work.
1. Include structural analysis signed and sealed by a professional engineer responsible
for their preparation.
C. Glass Samples: One12 inch square sample of each type of skylight glass.
D. Finish Samples: Two samples for each type of exposed finish required.
E. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, for metal framed skylights proposed.
F. Sealant manufacturer's certification of sealant compatibility, approval of sealant joint design,
and application procedures.
G. Glass manufacturer's approval of glazing details and structural glass design.
H. Maintenance Data: For metal framed skylights to include in maintenance manuals.
1. Include a key plan for glass sizes, make-up and source for future replacement.
1.6 QUALITY ASSURANCE
A. Manufacturer and Installer Qualifications:
1. Entity capable of assuming single responsibility for engineering, manufacturing, and
installing work of this Section.
2. Design framed skylight system under direct supervision of a professional engineer
experienced in design of work of the type specified in this Section and licensed in the
State of Oregon.
B. Testing Agency Qualifications: An independent agency qualified according to ASTM E 699 for
testing indicated.
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C. Welding: Qualify procedures and personnel according to AWS D1.2, `Structural Welding
Code-Aluminum."
1.7 PRE-INSTALLATION MEETING
A. Conduct a preinstallation meeting with Architect, Contractor, Installer and related trades
present at least one week prior to start of installation.
1.8 PROJECT CONDITIONS
A. Field Measurements: Indicated measurements on Shop Drawings.
1.9 WARRANTY
A. Special Assembly Warranty: Manufacturer and Installer agrees to repair or replace any
component of metal framed skylight that fail in material or workmanship within 5 years.
1. Failures include, but are not limited to, the following:
a. Structural failures including, but not limited to, excessive deflection.
b. Noise or vibration caused by thermal movements.
c. Deterioration of metals, metal finishes, and other materials beyond normal
weathering.
d. Adhesive or cohesive sealant failiures.
e. Water leakage.
2. Warranty Period: 5 years from date of Substantial Completion.
a. Silicone Sealant Manufacturer's Warranty: 10 years on weather seals and
structural silicone.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer:
1. DeaMor Associates, Inc. (503-284-6799; 206-574-3449)
B. Other Manufacturers: Submit according to requirements of Section 01 2500.
2.2 PERFORMANCE REQUIREMENTS
A. Provide products that have been tested in accordance with following methods to verify
compliance with specified performance requirements:
1. Structural Performance: ASTM E 330, No breakage, component disengagement or
permanent distortion at 1.0 and 1.5 times design load for both positive and negative
static pressure.
2. Water Leakage: ASTM E 331; No water leakage at 6.24 PSF static pressure, with test
pressure maintained for full duration of one 15-minute cycle.
3. Air Infiltration: ASTM E 283, Air infiltration not to exceed 0.06 CFM/SF at 10.0 PSF
static pressure.
B. Design and size components to withstand dead and live loads caused by snow drift loading
and positive and negative wind pressure as required by State of Oregon Structural Specialty
Code based on the International Building Code.
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C. Limit deflection of skylight members to 1/180 of their length up to 20 feet and 1/240 over 20
feet, or limit deflection of glass to 3/4 inch over one light, whichever is less.
D. Design fasteners for a 4 to 1 safety factor based on ultimate loading.
E. Design skylight assembly to withstand temperature variations up to 120 degrees F without
over stressing glazing,fasteners or framing.
F. Design skylight so as to prevent excessive noise such as popping and creaking and wind
harmonics.
G. Design bearing and edge clearances as required to accommodate expansion and contraction
of glazing materials with edge clearance of 1/4 inch minimum to nearest metal surface.
H. Design skylight system with a continuous integral gutter system on glass supporting members
to drain water or condensation to exterior.
1. Condensation Gutter Channels: Minimum 3/8 inch inside edge of glass support shelf
on glass supporting members to capture water at intersection of glass and framing.
2. Locate horizontal gutters above rafter gutters interlocked with a positive drip tab to
direct water into rafter gutter.
Design horizontal glazing components, including eave, flush glazed to allow water to move
freely off skylight.
J. Design and engineer sealant joints for intended use.
2.3 METAL MATERIALS
A. Framing Members including Perimeter Angles and Caps:
1. Extruded Aluminum:ASTM B 221, alloy 6063 or 6061, temper T-5 or T-6;Alloy and
temper as recommended by manufacturer for type of use and finish.
2. Tubular or I-Beam Framing Sections: 0.10 inch minimum thickness.
B. Formed Aluminum: ASTM B 209, 6061-T6 alloy sheet material and accessories.
1. Structural Members: Minimum 0.01 inch thickness.
2. Non-Structural Members: Minimum 0.06 inch thickness.
3. Anchor plates as required for structural adequacy.
C. Pressure Caps: Manufacturer's standard aluminum components that mechanically retain
glazing.
1. Include snap-on aluminum trim that conceals fasteners.
D. Anchors, Fasteners, and Accessories: Manufacturer's standard, corrosion resistant,
nonstaining, and nonbleeding; compatible with adjacent materials.
1. Pressure Cap Fasteners: ASTM A 193, non-magnetic, 300 series stainless steel
screws, with neoprene sealer washers.
2. Where fasteners are subject to loosening or turning out from thermal and structural
movements, wind loads, or vibration, use self-locking devices.
3. Exterior Fasteners: Non-magnetic, 300 series, stainless steel, finished to match
framing system.
4. Interior Fasteners, Not Exposed to Moisture: Zinc-plated steel.
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E. Anchor Bolts: ASTM A 307, Grade A, Property Class 4.6, hot-dip zinc coating, ASTM A 153,
Class C.
F. Concealed Flashing: Manufacturer's standard, corrosion resistant, nonstaining, and
nonbleeding flashing compatible with adjacent materials.
G. Exposed Flashing and Closures: Manufacturer's standard aluminum components not less
than 0.060 inch thick.
H. Sealants: Silicone type specified in Section 07 9200.
Slip Joint Liner: Line slip joints to prevent metal to metal friction.
1. Teflon or 3-M Scotch Ultra-High Modular Weight(UHMW) polyethylene tape with
adhesive one side, thickness as required to allow free movement and prevent noise
due to thermal expansion.
J. Dissimilar Metal Protection: 3-M "Scotchrap 50 inches, 10 mil, black vinyl corrosion resistant
tape.
2.4 GLAZING SYSTEMS
A. Glazing:As specified in Section 08 8000. Size overhead glazing in conformance with loading
and local code requirements.
B. Glazing Gaskets: Extruded silicone or Santoprene, compatible with adjacent sealant,
mechanically interlocked into skylight glazing bars and caps so that gasketing provides a
setting surface and waterproof seal against both surfaces of glass.
1. Tape or butyl gaskets not allowed in glazing system.
C. Spacers, Setting Blocks: Manufacturer's standard elastomeric types.
1. Provide extruded glazing wedges, mechanically locked into glazing bars, which fully
support glass edges with silicone block to prevent slipping and lateral movement of
glass.
D. Glazing Sealants:As specified in Section 08 8000.
2.5 FABRICATION
A. Fabricate aluminum components before finishing.
1. Pre-tab and shop weld or solder flashing prior to finishing.
B. Fabricate aluminum components that, when assembled, have the following characteristics:
1. Profiles that are sharp, straight, and free of defects or deformations.
2. Accurately fitted joints with ends coped or mitered.
3. Internal guttering systems or other means to drain water passing joints, condensation
occurring within framing members, and moisture migrating within skylight to exterior.
4. Physical and thermal isolation of glazing from framing members.
5. Accommodations for thermal and mechanical movements of glazing and framing to
maintain required glazing edge clearances.
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C. Fabricate aluminum sill closures with weep holes and for installation as continuous
component.
1. Baffle system weep holes to prevent excessive air and water infiltration.
a. Use 30 PPI polyvinyl chloride coated reticulated foam, or equivalent,
mechanically compressed to 50 percent of its thickness.
2.6 FACTORY FINISHING
A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products"for
recommendations for applying and designating finishes to exposed aluminum surfaces.
B. High Performance Organic Finish (2 Coat Fluoropolymer): AA-C12C42R1x(chemical paint
finish of inhibitive primer and fluoropolymer color topcoat containing not less than 70 percent
polyvinylidene fluoride resin by weight) comply with AAMA 2604.
1. Color as selected by Architect from full range of industry colors and color densities.
PART 3 EXECUTION
3.1 EXAMINATION
A. Examine existing conditions and verify conditions are satisfactory for installation of skylights.
1. Verify that curb flashing extends over top of curb.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION
A. General:
1. Comply with manufacturer's written instructions and approved Shop Drawings.
2. Do not install damaged components.
3. Fit joints between aluminum components to produce hairline joints free of burrs and
distortion.
4. Rigidly secure nonmovement joints.
5. Install anchors with separators and isolators to prevent metal corrosion and
electrolytic deterioration and to prevent impeding movement of moving joints.
6. Seal joints watertight, unless otherwise indicated.
B. Metal Protection: Where aluminum will contact dissimilar materials, protect against galvanic
action.
1. Where possible, apply in shop.
2. Locate so as to be concealed after installation.
C. Install continuous aluminum sill closure with weatherproof expansion joints and locked and
sealed corners. Locate weep holes at rafters.
D. Install components to drain water passing joints, condensation occurring within framing
members, and moisture migrating within skylight to exterior.
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E. Fit and secure joints with screw and spline, with rigid joints and connections that are flush.
hairline, and weatherproof.
1. Reinforce aluminum components as required to receive fastener threads.
F. Install components level, plumb and properly aligned with uniform joints and reveals.
G. Install glazing as specified in Section 08 8000, and in accordance with skylight manufacturer's
instructions.
1. Retain glass with extruded caps screwed to rafters and continuous extruded
horizontal members at ridge.
H. Seal skylight system with minimal sealant, only as engineered for structural glass retention or
exterior waterproofing at horizontal butt joints.
1. Do not install sealant in contact with insulated glass seals.
2. Do not install sealant along rafter cap line or on interior of skylight.
Erection Tolerances:
1. Alignment: Limit offset from true alignment to 1/32 inch where surfaces abut in line,
edge to edge, at corners, or where a reveal or protruding element separates aligned
surfaces by less than 3 inches; otherwise offset limit to 1/8 inch.
a. At glass supporting members, align hairline joints to within 1/64 inch.
2. Location and Plane: Limit variation from true location and plane to 1/8 inch in 12 feet
but not greater than 1/2 inch over total length.
3.3 CLEANING AND PROTECTION
A. Leave glass and components free of protective material, identification labels and excess
sealant.
B. Clean glass and components prior to final acceptance in accordance with manufacturer's
recommended methods.
C. Protect skylights from damage during remainder of construction period.
1. Remove and replace defective or damaged components.
END OF SECTION
LRS Architects, Inc.
City of Tigard [ADDM. 01] Portland Cement Plastering: 09 2400
City Hall, Police and Permit Center Re-Skin Page 1
May 22, 2014
PART 1 GENERAL
1.1 SUMMARY
A. Section includes the following:
1. Portland three-coat cement plastering system with an acrylic finish coat over
suspended metal lath ceiling.
1.2 SUBMITTALS
A. Product Data, for each product specified.
B. Samples, 12 by 12 inches in size for each type of texture and color indicated.
1.3 QUALITY ASSURANCE
A. Standards: Comply with recommendations of the following:
1. Northwest Wall &Ceiling Bureau Standards.
2. Metal Lath/Steel Framing Association 920, "Guide Specifications for Metal Lathing
and Furring."
1.4 STORAGE AND HANDLING
A. Deliver material to job site in original containers with labels intact and legible.
B. Store materials inside, under cover, and dry, protected from weather, direct sunlight, surface
contamination, aging, corrosion, and damage.
1.5 PROJECT CONDITIONS
A. Comply with ASTM C 926 requirements, unless more stringent requirements indicated.
B. Do not mix or apply cement plaster when substrate or ambient air temperature is less than
40 degrees F. nor more than 80 degrees F.
C. Hot Weather:
1. Protect cement plaster from uneven and excessive evaporation during hot, windy,
and dry weather.
2. Moist cure base coat of cement plaster if ambient temperature is more than 75
degrees F. Moist cure for 48 hours after application of coats.
3. During hot, or dry to windy weather, moisten cement plaster and cover with a single
sheet of polyethylene plastic.
4. Moist curing is required at the start and end of each workday.
5. Moist curing not required when humidity is higher than 70 percent.
D. Protect adjacent work from soiling and moisture deterioration caused by plastering. Provide
temporary covering and other provisions necessary to minimize harmful spattering of plaster
on other work.
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PART 2 PRODUCTS
2.1 METAL SUPPORTS FOR SUSPENDED AND CEILINGS
A. Channels: Cold-rolled steel, Base metal thickness of 0.0538 inch with ASTM A 653, G60, hot-
dipped galvanized zinc coating.
1. Main Runners: 1-1/2 inch deep.
2. Cross Furring: 3/4 inch deep.
B. Wire Hangers: ASTM A 641, Class 1 zinc coating, soft temper, not less than 0.1620 inch
diameter.
C. Tie Wire: For saddle tying cross furring to main runners, ASTM A 641, Class 1 zinc coating,
soft temper, not less than 0.0475 inch diameter(18 gage).
2.2 LATH
A. Expanded Metal Lath:ASTM C 847 with ASTM A 653, G60, hot-dip galvanized zinc coating.
1. 3/8 inch (10 mm) rib lath, galvanized.
2.3 ACCESSORIES
A. General: Comply with ASTM C 1063 and coordinate depth of trim and accessories with
thicknesses and number of plaster coats required.
B. Provide the following accessories fabricated from hot-dip galvanized steel sheet or high
impact PVC:
1. Casing Beads: With perforated flanges in depth required to suit plaster bases and
flange length required to suit applications.
2. Control Joints: One-piece type, folded pair of unperforated screeds in M-shaped
configuration; with perforated flanged and removable protective tape on plaster face
of control joint.
3. Expansion Joints: Two-piece type, pair of casing beads with back flanges formed to
provide slip joint action and square edged reveal that is adjustable for joint widths
from 1/4 to 5/8 inch.
2.4 PLASTER MATERIALS
A. Base Coat Cements:
1. Portland cement, ASTM C 150 Type I.
2. Masonry cement, ASTM C 91, Type N.
B. Ready-Mixed Base Coat Plaster: Mill mixed portland cement, aggregates, and proprietary
ingredients.
1. Manufacturers:
a. Dryvit Systems, Inc.
b. LaHabra.
c. Parex Incorporated.
d. Sto Corporation.
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C. Acrylic Based Finish Coat: Factory mixed formulation of 100 percent acrylic polymer base
emulsion, colorfast mineral pigments, and fine aggregates specifically recommended by
acrylic based finish manufacturer for use over portland cement plaster base coats; include
manufacturer's recommended primers and sealing topcoats for acrylic based finishes.
1. Manufacturers:
a. Dryvit Systems, Inc.
b. LaHabra.
c. Parex Incorporated.
d. Sto Corporation.
2. Color as selected by Architect from manufacturer's full range of colors.
D. Tinted Primer(Surface Conditioner): Acrylic based finish manufacturer's standard factory-
mixed elastomeric-polymer primer for preparing substrate surface for application of finish
coat, with color closely matched to selected finish coat color.
E. Sand Aggregate for Base Coats:ASTM C 897.
F. Fiber for Base Coats:Alkaline resistant nylon fibers, free of contaminates, type specifically
manufactured for use in portland cement plaster or concrete.
1. Acceptable Manufacturer: Nycon, Inc.; Nycon Synthetic Fiber.
G. Water: Potable,free from substances harmful to plaster, lath and accessories.
2.5 CEMENT PLASTER MIXES
A. General: Comply with ASTM C 926 and recommendations of the Northwest Wall &Ceiling
Bureau Resource Guide"Portland Cement Plaster—Stucco"for applications indicated.
1. Fiber Content: Add fiber to mixes after ingredients have mixed at least 2 minutes.
Comply with manufacturer's written instructions but not to exceed 1 lb/cu.ft. of
cementitious material. Reduce aggregate quantities accordingly to maintain
workability.
B. Base Coats:
1. 1 part portland cement.
2. 1 part masonry cement.
3. 3-1/2 to 4-1/2 parts sand (volume of sand per sum of cementitious material)
4. Chopped nylon strands in amount recommended by manufacturer.
5. Water.
C. Factory Prepared Base Coats: Add water and fiber only; comply with finish coat
manufacturer's instructions.
D. Acrylic Based Finish Coat and Tinted Primer(Surface Conditioner): Apply material as factory
packaged; do not add other ingredients; comply with manufacturer's instructions.
1. Color:As selected by Architect.
E. Size batches for complete use within one hour after mixing.
F. Withhold 10 percent of mixing water until mixing is almost complete then add as needed to
produce necessary consistency. Keep water to a minimum.
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PART 3 EXECUTION
3.1 EXAMINATION
A. Verify areas and substrates are ready to receive work of this Section.
1. Proceed only after unsatisfactory conditions have been corrected.
B. Verify that substrate assembly meets deflection design criteria of minimum L/360.
3.2 PREPARATION
A. Protect adjacent work from soiling, spattering, moisture deterioration, and other harmful
effects caused by plastering.
3.3 INSTALLATION OF SUSPENDED CEILINGS AND SOFFITS
A. Coordinate with installation of overhead structural systems to ensure inserts and other
structural anchorage provisions have been installed to receive hangers for suspended ceilings
and soffits.
B. Attach framing components to structure above ceiling in accordance with ASTM C 1063,
recommendations of Northwest Wall & Ceiling Bureau Standards, and Metal Lath/Steel
Framing Association 920, "Guide Specifications for Metal Lathing and Furring,"and as
follows:
1. Main Runner Channels Spacing: 48 inches o.c.
2. Cross Furring Channel Spacing: 13 to 16 inches o.c.
a. Wire tie lath to cross furring channels at 6 inches o.c.
3.4 INSTALLATION OF LATHING MATERIALS
A. Standards: Install according to ASTM C 1063, recommendations of Northwest Wall &Ceiling
Bureau Standards, and Metal Lath/Steel Framing Association 920, "Guide Specifications for
Metal Lathing and Furring,"and requirements of State Building Code, Chapter 25, and as
follows:
1. Attach metal lath to accessories with tie wire.
2. Place sealant between joints of trim accessories.
B. Accessory Items: Install level, plumb and true, and so they create a proper screed and depth
for cement plaster.
C. Place casing beads at terminations of plaster finish. Butt and align ends. Secure rigidly in
place.
D. Locate control and expansion joints as indicated, or if not indicated, as follows.
1. Maximum Horizontal Surfaces Area: 100 sq. ft.
2. Distance between control joints not to exceed 18 feet in either direction or a length to
width ratio of 2-1/2 to 1.
3. Where control joints occur in surface of construction directly behind plaster.
4. Where plasterwork areas change dimensions, to delineate rectangular shaped areas
(panels)and to relieve the stress that occurs at the corner formed by the dimension
change.
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3.5 PLASTER APPLICATION
A. Apply plaster in accordance with ASTM C 926 and recommendations of Northwest Wall &
Ceiling Bureau Standards.
1. Do not deviate more than plus or minimum 1/4 inch in 10 feet from a true plane in
finished plaster surfaces, as measured by a 10 foot straightedge placed on surface.
B. Do not use materials that are caked, lumpy, dirty, or contaminated by foreign materials.
C. Do not use excessive water in mixing and applying plaster materials.
D. Use a shingle-type float for floating the Brown Coat to increase the density of the cement
membrane and increase water resistance and reduce cracking; Do not use a sponge-type
float.
E. Apply 3 coats over metal lath, for a nominal total thickness of 3/4 inch, as follows:
1. Scratch Coat: Nominal 1/4 to 3/8 inch.
2. Brown Coat: Nominal 1/4 to 3/8 inch.
3. Finish Coat: Nominal 1/8 inch.
F. Moist cure cement plaster base coats for 10 to 14 days prior to application of acrylic finish
coat.
G. Tinted Primer(Surface Conditioner) and Preparation to Receive Acrylic Based Finish Coat:
Prepare cement plaster and concrete surfaces to receive acrylic based finish coat, and apply
tinted primer (surface conditioner), as recommended by manufacturer of acrylic based finish
coating.
1. Remove surface contaminants.
2. Remove loose, damaged or deteriorated materials.
3. Repair surfaces defects with patching materials.
4. Repair surface cracks.
5. Apply tinted primer (surface conditioner) by rolling.
6. Skim coat or level the surface to required tolerance and fill all voids.
H. Acrylic Finish Coat: Apply as recommended by manufacturer, and the following:
1. Apply only at an ambient temperature of 40 degrees F and rising, maintained for a
minimum of 48 hours after application.
2. Apply continuously in one operation to entire area.
3. Maintain wet edge.
4. Apply finish with no scaffold lines or other application marks.
5. Protect finished surface from climatic conditions until dry.
6. Do not moist cure acrylic finish coat.
3.6 PLASTER SURFACE TEXTURE
A. As approved by Architect.
3.7 CUTTING AND PATCHING
A. Cut, patch, replace, repair, and point up plaster as necessary to accommodate other work.
B. Repair cracks and indented surfaces.
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C. Point up finish plaster surfaces around items that are built into or penetrate plaster surfaces.
D. Repair or replace work to eliminate blisters, buckles, check cracking, dry outs, efflorescence,
excessive pinholes, and similar defects.
3.9 CLEANING AND PROTECTION
A. Remove temporary covering and other provisions made to protect other work.
B. Provide final protection and maintain conditions to ensure that plastering work is without
damage or deterioration at time of Substantial Completion.
END OF SECTION
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PART 1 GENERAL
1.1 SUMMARY
A. Section includes gypsum board and accessories including the following:
1. Interior gypsum board.
B. Related Sections:
1. Section 06 1053: Miscellaneous Carpentry, for wood framing that supports gypsum
board.
2. Section 06 1600: Sheathing, for exterior gypsum sheathing.
3. Section 07 9200: Joint Sealants
4. Section 09 9000: Painting,for gypsum board paint, prime and finish.
1.2 DEFINITIONS
A. Gypsum Board Construction Terminology: Refer to ASTM C 11 and GA-505 for definitions of
terms for gypsum board assemblies.
1.3 SUBMITTALS
A. Product Data, for each type of product indicated.
1.4 QUALITY ASSURANCE
A. Use skilled workers trained and experienced in necessary crafts and familiar with
requirements and methods needed for proper performance of work of this Section.
1. Installer: Company with not less than 3 years experience installing gypsum board
systems in project of similar size, quality and complexity under present name.
B. Comply with the following standards:
1. ASTM C 840, Specification for Application and Finishing of Gypsum Board.
2. Gypsum Association Document GA-216, Application and Finishing of Gypsum Board.
3. Northwest Wall and Ceiling Bureau recommendations for gypsum wallboard finishes.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Store materials inside under cover, dry and protected against damage from weather,
condensation, direct sunlight, construction traffic, and other causes.
1. Store gypsum panels flat in a manner to prevent sagging.
1.6 PROJECT CONDITIONS
A. Environmental Limitations: Comply with ASTM C 840 requirements or gypsum board
manufacturer's written instructions, whichever are more stringent.
B. Do not install interior products until installation areas are enclosed and conditioned.
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C. Do not install panels that are wet, those that are moisture damaged, and those that are mold
damaged.
1. Indications that panels are wet or moisture damaged include, but are not limited to,
discoloration, sagging, or irregular shape.
2. Indications that panels are mold damaged include, but are not limited to, fuzzy or
splotchy surface contamination and discoloration.
D. Maintain sufficient ventilation for proper joint treatment drying.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Subject to compliance with requirements, provide products of the following:
1. Gypsum Products:
a. CertainTeed Corporation.
b. G-P Gypsum.
c. National Gypsum Company.
d. USG Corporation.
2. Metal and Plastic trim:
a. AMICO.
b. Beadex.
c. Plastic Components, Inc.
d. Vinyl Corp.
B. Substitutions: Submit in accordance with requirements of Section 01 2500.
2.2 INTERIOR GYPSUM BOARD
A. General: Complying with ASTM C 36 or ASTM C 1396, as applicable to type of gypsum board
indicated and whichever is more stringent.
B. Gypsum Board: 5/8 inches thick with long edges tapered; Fire retardant Type X.
1. Gypsum board complying with ASTM C 1396 may be used for gypsum backing board
for multilayer applications, 5/8 inches thick, Type X.
2.3 TRIM ACCESSORIES
A. Interior Trim: Comply with ASTM C 1047.
1. Material: Galvanized steel sheet or plastic.
2. Shapes:
a. Cornerbead.
b. Bullnose bead.
c. LC-Bead: J-shaped; exposed long flange receives joint compound.
d. L-Bead: L-shaped; exposed long flange receives joint compound.
e. U-Bead: J-shaped; exposed short flange does not receive joint compound.
f. Expansion (control)joint.
g. Curved-Edge Cornerbead: With notched or flexible flanges.
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2.4 JOINTING SYSTEM
A. General: Comply with ASTM C 475.
B. Joint Tape: Paper.
C. Joint Compound:
1. Interior Applications:
a. Prefilling: At open joints and damaged surface areas, use setting-type taping
compound.
b. Embedding and First Coat: For embedding tape and first coat on joints,
fasteners, and trim flanges, use setting-type taping compound or drying-type,
taping compound.
1) Use setting-type compound for installing paper-faced metal trim
accessories.
c. Fill Coat: For second coat, use setting-type, sandable topping or drying-type,
topping compound.
d. Finish Coat: For third coat, use drying-type, topping compound.
PART 3 EXECUTION
3.1 EXAMINATION
A. Examine areas and substrates and verify conditions are ready to receive work of this Section.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Coordinate as required with other trades to assure proper and adequate provision in work of
those trades for interface with work of this Section.
3.3 GYPSUM BOARD INSTALLATION
A. General: Install and finish gypsum board to comply with ASTM C 840 and GA-216.
1. Butt panel together for a light contact at edges and ends, with not more than 1/16 inch
of open space between panels. Do not force into place.
2. Locate edge and end joints over supports.
3. At internal and external corners, conceal cut edges of boards by overlapping covered
edges of abutting boards.
4. Do not make joints other than control joints at corners of framed openings.
5. Maintain 3/8 inch minimum distance between fastener and board edge.
a. Drive specified screws with clutch-controlled power screwdrivers.
b. Dimple board surface 1/32 inch with fastener; do not fracture face paper.
6. Screw Fastener Schedule:
a. Panel Perimeter Spacing: 12 inches o.c., unless otherwise noted.
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b. Panel Intermediate Support Spacing:
1) Walls:
a) Framing at 16 inches on center: 16 inches o.c.
b) Framing at 24 inches on center: 12 inches o.c.
7. Isolate perimeter of non-load bearing partitions at structural abutments, except at
floors.
a. Provide 1/4 to 1/2 inch wide joints at these locations.
b. Trim edges with U-bead edge trim where edges of gypsum board are
exposed.
B. Walls:
1. Install gypsum board with tapered edges vertical, and to within 1/4 inch of floor,
unless horizontal application is required by GA or UL listing for wall types.
2. Stagger joints on opposite sides of partition.
3.4 ALLOWABLE INSTALLATION TOLERANCES
A. Maximum Ceiling Deflection: Provide framing and thickness of gypsum board, fastened as
required, to achieve maximum deflection of 1/360 of span.
B. Maximum Deviation from True Plane: 1/8 inch per 10 foot, and 1/16 inch in any running foot.
1. Check trim for conformance to tolerances.
3.5 CONTROL JOINTS
A. Provide control joints according to ASTM C 840 and in specific locations approved by
Architect for visual effect.
3.6 CORNER TREATMENT
A. Internal Corners: Treat as specified for joints, but fold reinforcing tape lengthwise through
middle and fit neatly into corner.
B. External Corners and Exposed Edges:
1. Install specified corner bead, fitting neatly over corner and securing with same type
fasteners used for installing wallboard.
2. Space fasteners approximately 6 inches o.c. and drive through wallboard into framing
or furring member.
3.7 GYPSUM BOARD FINISHING
A. General: Treat gypsum board joints, interior angles, edge trim, control joints, penetrations,
fastener heads, surface defects, and elsewhere as required to prepare gypsum board
surfaces for decoration. Promptly removed residual joint compound from adjacent surfaces.
B. Prefill open joints, rounded or bevel edges, and damaged surface areas.
C. Apply joint tape over gypsum board joints, except those with trim accessories not requiring
tape.
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D. Levels of Finish: Comply with GA-214, and recommendations of Northwest Wall and Ceiling
Bureau for gypsum board finishes, as follows:
1. Level 4, Three Coat Application: Gypsum board surfaces with paint finish.
E. Application of Levels of Finish:
1. Level 4 Finish: Three coat application.
a. Embed tape in joint compound leaving a smooth thin coat of joint compound
over tape.
b. Apply a separate coat of joint compound over the first coat, leaving a smooth
surface free of ridges, tool marks and sanding grooves.
c. Apply a final coat of joint compound feathered out over the second coat,
leaving a smooth surface flush with gypsum board and free of all marks.
Feather finishing compound to not less than 12 inches wide.
d. Cover fastener heads with a coat of joint compound followed with separate
second and final coats as described above for taped joints.
e. When finishing compounds are dry, sandpaper to obtain a uniformly smooth
surface, taking care to not scuff paper surface of wallboard.
f. Wipe gypsum board surfaces with damp cloth.
3.8 GYPSUM BOARD SURFACE TEXTURE
A. Gypsum Board Surface Texture: Match existing adjacent surface texture.
3.9 REPAIRS
A. Repair screw pops by installing new screw approximately 1-1/2 inches away from projecting
screw and reset projecting screw if face paper is fractured, remove projecting screw, fill
damaged surface and finish flush and smooth.
B. Fill cracks; finish flush and smooth.
3.10 CLEANING UP
A. Clean exposed surfaces affected by work of this Section, and repair imperfections in finish.
B. In addition to other requirements for cleaning, use necessary care to prevent scattering
gypsum board scraps and dust, and to prevent tracking gypsum and joint finishing compound
onto floor surfaces.
C. Remove scrap, debris, and surplus material of this Section at completion of each segment of
installation and dispose of in legal manner.
END OF SECTION
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