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Northwest ENERGY STAR® Homes, Version 3 (Rev. 01 )
B STAR
Rims-Arm Thermal Enclosure System Verifier Checklist'
Home Address: 11340 SW Hallmark Terrace City: Tigard State:OR
Inspection Guidelines Must Builder
Verifier
Correct verified Verified
1. High-Performance Fenestration
1.1 Fenestration shall meet or exceed Northwest ENERGY STAR Homes BOP or TCO 2 I ❑ I ❑ I 0 I ❑
2. Quality-Installed Insulation
2.1 Ceiling,wall,floor,and slab insulation levels shall meet or exceed Northwest ENERGY STAR
Homes BOP Prescriptive Path or TCO requirements 3'45 ❑ ❑ ❑
2.2 All ceiling,wall,floor,and slab insulation shall achieve RESNET-defined Grade I installation
or,alternatively, Grade II for surfaces with insulated sheathing(see checklist item 4.4.1 for ❑ ❑ O ❑
required insulation levels)
3. Fully-Aligned Air Barriers6
At each location noted below,a complete air barrier shall be provided that is fully aligned with the insulation as follows:
•At interior surface of ceilings.Also, include barrier at interior edge of attic eave using a wind baffle that extends to the full height of
-the-insulation. Include a baffle in every bay or a tabbed baffle in each bay with a soffit vent that will also prevent wind washing of
insulation in adjacent bays.
•At exterior surface and interior surface of walls 7
•At interior surface of floors,including supports to ensure permanent contact and blocking at exposed edges 8'9 .
3.1 Walls 70
3.1.1 Walls behind showers and tubs ❑ ❑ 0 ❑
3.1.2 Walls behind fireplaces _ ❑ ❑ 0 ❑
3.1.3 Attic knee walls ❑ ❑ 0 ❑
3.1.4 Skylight shaft walls ❑ ❑ ❑ 0
3.1.5 Wall adjoining porch roof ❑ ❑ 0 ❑
3.1.6 Staircase walls ❑ ❑ _0 IZI❑
3.1.7 Double walls ❑ ❑ ❑ 0 .
3.1.8 Garage rim/band joist adjoining conditioned space _ ❑ ❑ 0 ❑
3.1.9 All other exterior walls ❑ ❑ 0 ❑
3.2 Floors
3.2.1 Floor above garage ❑ ❑ 0 ❑
3.2.2 Cantilevered floor ❑ ❑ ❑ 0
3.2.3 Floor above unconditioned basement or vented crawlspace ❑ ❑ 0 ❑
3.3 Ceilings 10
3.3.1 Dropped ceiling/soffit below unconditioned attic ❑ ❑ O ❑
_
3.3.2 All other ceilings ❑ ❑ 0 ❑
4. Reduced Thermal Bridging
4.1 For insulated ceilings with attic space above(i.e., non-cathedralized ceilings),uncompressed ❑ ❑ 0 ❑
insulation a R-21 extends to the inside face of the exterior wall below.
4.2 For slabs on grade,insulation under slab meets or exceeds Northwest ENERGY STAR
Homes BOP or TCO,and 100%of slab edge insulated to a R-5 at depth specified by BOP or ❑ ❑ ❑ 0
__ TCO and aligned with thermal boundary of the walls.°•5 __ _
4.3 HVAC and other attic platforms constructed to allow for full-depth insulation below. ❑ ❑ ❑ 0
4.4 Reduced thermal bridging at abovezgrade walls separating conditioned from unconditioned space(rim/band joists exempted)
using one of the following options: 1"
4.4.1 Continuous rigid insulation sheathing, insulated siding,or combination of the two; z
R-3 in Climate Zone 4, a R-5 in Climate Zones 5&64' 15,OR; ❑ ❑ ❑ _ 0
4.4.2 Structural Insulated Panels(SIPs), OR; ❑ ❑ ❑ 0
4.4.3 Insulated Concrete Forms(ICFs), OR; ❑ ❑ ❑ 0
4.4.4 Double-wall/staggered stud framing76,OR(see next page); ❑ ❑ ❑ 0
Effective for homes permitted starting 01/01/2012 Revised 04/16/2012 Page 1 of 14
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t
Northwest ENERGY STAR® Homes, Version 3 (Rev. 01 )
HOMES TA if Thermal Enclosure System Verifier Checklist'
Inspection Guidelines Must Builder Verifier N/A
Correct Verified Verified
4.4.5 Advanced framing, including all of the items below: ❑ ❑ m ❑
4.4.5.a All corners insulated to zR-6 at edge17,AND; ❑ ❑ la ❑
4.4.5.b All headers above windows&doors insulated's,AND; _ ❑ _ _❑ VI ❑
4.4.5.c Framing limited at all windows&doors7s,AND; ❑ ❑ 0 ❑
4.4.5.d All interior/exterior wall intersections insulated to the same R-value as the
El
rest of the exterior wall 20,AND; ❑ ❑ El
4.4.5.e Minimum stud spacing of 19 in. o.c.framing unless construction documents
specify other spacing is structurally required 21 ❑ ❑ m ❑
5. Air Sealing
5.1 Penetrations to unconditioned space fully sealed with solid blocking or flashing as needed and gaps sealed with caulk or foam
5.1.1 Duct/flue shaft ❑ ❑ 0 ❑
5.1.2 Plumbing/piping ' ❑ ❑ m ❑
5.1.3 Electrical wiring ❑ ❑ m ❑
5.1.4-- Bathroom and kitchen exhaust fans ❑ ❑ - m -0
•
5.1.5 Recessed lighting fixtures adjacent to unconditioned space ICAT labeled and fully
gasketed.Also,if in insulated ceiling without attic above,exterior surface of fixture ❑ ❑ el ❑
insulated to>R-10 to minimize condensation potential.
5.1.6 Light tubes adjacent to unconditioned space include lens separating unconditioned ❑ ❑ ❑ 0
and conditioned space and are fully gasketed.
5.2 Cracks in the building envelope fully sealed
5.2.1 All sill plates adjacent to conditioned space sealed to foundation or sub-floor with
caulk. Foam gasket also placed beneath sill plate if resting atop concrete or ❑ ❑ m ❑
masonry and adjacent to conditioned space.
5.2.2 At top of walls adjoining unconditioned spaces,continuous top plates or sealed ❑ ❑ o .❑_
blocking using caulk,foam,or equivalent material
5.2.3 Sheetrock sealed to top plate at all attic/wall interfaces using caulk,foam,or
equivalent material. Either apply sealant directly between sheetrock and top plate or ❑ ❑ El ❑
to the seam between the two from the attic above.Construction adhesive shall not
be used.
5.2.4 Rough openings around windows&exterior doors sealed with caulk or foam ❑ ❑ 0 ❑
5.2.5 Marriage joints between modular home modules at all exterior boundary conditions ❑ ❑ ❑ 0
fully sealed with gasket and foam
5.2.6 All seams at Structural Insulated Panels(SIPs)foamed and/or taped per ❑ ❑ ❑ 0
manufacturer's instructions
5.2.7 In multi-family buildings,the gap between the drywall shaft wall(i.e.common wall) ❑ ❑ m ❑
and the structural framing between units fully sealed at all exterior boundaries
5.2.8 Rim/band joists between conditioned and unconditioned space fully sealed using ❑ ❑ 0 ❑
caulk or foam
5.3 Other Openings
5.3.1 Doors adjacent to unconditioned space(e.g., attics,garages,basements)or ❑ ❑ El ❑
ambient conditions gasketed or made substantially air-tight
5.3.2 Attic access panels and drop-down stairs equipped with a durable aR-10 insulated
cover that is gasketed(i.e., not caulked)to produce continuous air seal when ❑ ❑ m ❑
occupant is not accessing the attic 23
5.3.3 Whole-house fans equipped with a durable aR-10 insulated cover that is either
installed on the house side or mechanically operated 23 ❑ ❑ ❑ El
Verifier Name: Emily Vella-0302 Verifier Pre-Drywall Inspection Date: 6.3.13 Verifier Initials: EV
Verifier Name: Mike Wirkkula Verifier Final Inspection Date: 08.05.13 Verifier Initials: 1102
Builder Employee: Builder Inspection Date: Builder Initials:
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Northwest ENERGY STAR® Homes, Version 3 (Rev. 01 )
HOMES Thermal Enclosure System Verifier Checklist'
Notes:
1. At the discretion of the Verifier, the builder may verify up to eight items specified in this Checklist. When exercised, the
builder's responsibility will be formally acknowledged by the builder signing off on the Checklist for the item(s) that they
verified.
2. All windows, doors and skylights shall meet or exceed the component U-factor and SHGC requirements specified in the
relevant Northwest ENERGY STAR Homes BOP or TCO, located at:www.northwesteneraystar.com/partners. Note that the U-
factor requirement applies to all fenestration while the SHGC only applies to the glazed portion.
Fenestration utilized as part of a passive solar design may be exempt from these requirements. Exempted windows shall be
facing within 15 degrees of true south and directly coupled to thermal storage mass that has a heat capacity > 20 btu/ft3x°F
and provided in a ratio of at least 3 sq. ft per sq. ft. of south facing fenestration. Generally, thermal mass materials will be at
least 2"thick.
Up to 0.75%of conditioned floor area (CFA)may be used for decorative glass that does not meet Northwest ENERGY STAR
Homes BOP or TCO requirements. For example, a home with total above-grade conditioned floor area of 2,000 sq. ft. may
have up to 15 sq. ft. (0.75% of 2,000) of decorative glass. However, all decorative glass and skylight window areas count
toward the total window area to above-grade conditioned floor area (WFA) ratio. For homes using the Prescriptive Path that
have a WFA ratio greater than that stipulated in the BOP or TCO, an improved window U-Value is required. Guidance and
calculations for determining the adjusted U-value are provided in the BOP Reference Design Notes.
3. Insulation levels in a home shall meet or exceed the component insulation requirements specified in the relevant Northwest
ENERGY STAR Homes BOP or TCO, located at: www.northwestenerqvstar.com/partners. Compliance can be determined by
meeting component insulation requirements or using a total UA alternative.Where compliance will be determined with a total
UA approach, the State Certifying Organization (SCO)must approve the calculation method. Note that the U-factor for steel-
frame envelope assemblies shall be calculated using the ASHRAE zone method or a method providing equivalent results, and
not a series-parallel path calculation method.Additionally, reduction of ceiling insulation in space-constrained roof/ceiling
assemblies shall be limited to 500 sq. ft. or 20% of ceiling area, whichever is less. Also, note that while ceiling and slab
insulation can be included in trade-off calculations, Items 4.1 through 4.3 of the Checklist shall be met regardless of the UA
tradeoffs calculated.
4. Slab edge insulation is only required for slab-on-grade floors with a floor surface less than 24 inches below grade. Slab
insulation shall extend to the top of the slab to provide a complete thermal break. If the top edge of the insulation is installed
between the exterior wall and the edge of the interior slab, it shall be permitted to be cut at a 45-degree angle away from the
exterior wall.
5. Where an insulated wall separates a garage, patio, porch, or other unconditioned space from the conditioned space of the
house, slab insulation shall also be installed at this interface to provide a thermal break between the conditioned and
unconditioned slab.Where specific details cannot meet this requirement,partners shall provide the detail to EPA to request an
exemption prior to the home's qualification. EPA will compile exempted details and work with industry to develop feasible
details for use in future revisions to the program. A list of currently exempted details is available at:
www.eneraystar.gov/slabedge.
6. For purposes of this checklist, an air barrier is defined as any durable, rigid, solid material that blocks air flow between
conditioned space and unconditioned space, including necessary sealing to block excessive air flow at edges and seams. Air
barriers shall not be made of materials that are easily bent or torn. Additional information on proper air sealing of thermal
bypasses can be found on the Building America Web site(www.eere.energy.gov/buildings/building america)and in the EEBA
Builder's Guides(www.eeba.org). These references include guidance on identifying and sealing air barriers as well as details
on many of the items included in the checklist.
7. EPA highly recommends, but does not require, inclusion of an interior air barrier at band joists. An exterior air barrier at band
joists is required and can be achieved by sealing from the interior with caulk or foam or from the exterior with caulk or gasket
before sheathing is attached.
8. Examples of supports necessary for permanent contact include staves for batt insulation or netting for blown-in insulation.
Batts that completely fill a cavity enclosed on all six sides may be used to meet this requirement without the need for supports,
even though some compression will occur due to the excess insulation, as long as the compressed value meets or exceeds
the required insulation level. Specifically, the following batts may be used in six-sided floor cavities: R-19 batts in 2x6 cavities,
R-30 batts in 2x8 cavities, R-38 balls in 2x10 cavities,and R-49 batts in 2x12 cavities. For example, in a home that requires R-
19 floor insulation,an R-30 ball may be used in a six-sided 2x8 floor cavity.
9. Fully-aligned air barriers may be installed at the exterior surface of the floor cavity in all Climate Zones if the insulation is
installed in contact with this exterior air barrier and the perimeter rim and band joists of the floor cavity are also sealed and
insulated to comply with the fully-aligned air barrier requirements for walls.
10. All insulated vertical surfaces are considered walls(e.g.,exterior walls, knee walls)and must meet the air barrier requirements
for walls. All insulated ceiling surfaces, regardless of slope (e.g., cathedral ceilings,tray ceilings, conditioned attic roof decks,
flat ceilings,sloped ceilings),must meet the requirements for ceilings.
11. The minimum designated R-values must be achieved regardless of the trade-offs determined using an equivalent U-factor or
UA alternative calculation. Note that if the minimum designated values are used, they must be compensated with higher
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Northwest ENERGY STAR® Homes, Version 3 (Rev. 01 )
Ercesy s>a
k�s_ Thermal Enclosure System Verifier Checklist'
values elsewhere using an equivalent U-factor or UA alternative calculation in order to meet the overall insulation
requirements. Also, note that these requirements can be met by using any available strategy, such as a raised-heel truss,
alternate framing that provides adequate space, and/or high-density insulation. In Climate Zones 1 through 3,one option that
will work for most homes is to use 2x6 framing, an R-21 high-density batt, and a wind baffle that only requires 0.5 in. of
clearance.
12. Up to 10%of the total exterior wall surface area is exempted from the reduced thermal bridging requirements to accommodate
intentional designed details (e.g., architectural details such as thermal fins, wing walls, or masonry fireplaces; structural
details, such as steel columns). It shall be apparent to the Verifier that the exempted areas are intentional designed details or
the exempted area shall be documented in a plan provided by the builder, architect, designer, or engineer. The Verifier need
not evaluate the necessity of the designed detail to qualify the home.
13. Mass walls utilized as the thermal mass component of a passive solar design(e.g., a Trombe wall)are exempt from this item.
To be eligible for this exemption,the passive solar design shall be comprised of the following five components: an aperture or
collector, an absorber, thermal mass, a distribution system, and a control system. For more information, see:
http://www.energvsavers.gov/your home/designing remodeling/index.cfm/mvtopic=10270.
14. If used, insulated siding shall be attached directly over a water-resistive barrier and sheathing. In addition, it shall provide the
required R-value as demonstrated through either testing in accordance with ASTM C 1363 or by attaining the required R-value
at its minimum thickness. Insulated sheathing rated for water protection can be used as a water resistant barrier if all seams
are taped-and sealed. If non-insulated structural sheathing is used at corners,advanced framing details listed under Item 4.4.5
shall be met for those wall sections. ■
15. Steel framing shall meet the reduced thermal bridging requirements by complying with item 4.4.1 of the checklist.
16. Double-wall framing is defined as any framing method that ensures a continuous layer of insulation covering the studs to at
least the R-value required in Section 4.4.1 of the checklist, such as offset double-stud walls, aligned double-stud walls with
continuous insulation between the adjacent stud faces, single sill (2x8)with staggered studs, or single-stud walls with 2x2 or
2x3 cross-framing. In all cases, insulation shall fill the entire wall cavity from the interior to exterior sheathing except at
windows,doors and other penetrations.
17. All exterior corners shall be constructed to allow access for the installation of z R-6 insulation that extends to the exterior wall
sheathing. Examples of compliance options include standard-density insulation with alternative framing techniques, such as
using three studs per corner,or high-density insulation(e.g.,spray foam)with standard framing techniques.
18. Header insulation shall be a R-3 for wall assemblies with 2x4 framing, or equivalent cavity width, and Z R-5 for all other
assemblies (e.g., with 2x6 framing). Compliance options include continuous rigid insulation sheathing, SIP headers, other
prefabricated insulated headers,single-member or two-member headers with insulation either in between or on one side,or an
equivalent assembly, except where a framing plan provided by the builder, architect, designer, or engineer indicates that full-
depth solid headers are the only acceptable option. The Verifier need not evaluate the structural necessity of the details in the
framing plan to qualify the home.Also, the framing plan need only encompass the details in question and not necessarily the
entire home. R-value requirement refers to manufacturer's nominal insulation value.
19. Framing at windows shall be limited to a maximum of one pair of king studs and one pair jack studs per window opening to
support the header and window sill.Additional jack studs shall be used only as needed for structural support and cripple studs
only as needed to maintain on-center spacing of studs.
20. Insulation shall run behind interior/exterior wall intersections using ladder blocking,full length 2"x6"or 1"x6"furring behind the
first partition stud,drywall clips, or other equivalent alternative.
21. Vertical framing members shall either be on-center or have an alternative structural purpose (e.g., framing members at the
edge of pre-fabricated panels) that is apparent to the Verifier or documented in a framing plan provided by the builder,
architect, designer, or engineer. The Verifier need not evaluate the structural necessity of the details in the framing plan to
qualify the home.Also,the framing plan need only encompass the details in question and not necessarily the entire home. No
more than 5% of studs may lack an apparent or documented structural purpose, which is equivalent to one vertical stud for
every 30 linear feet of wall, assuming 16 in.o.c.stud spacing.
22. Light tubes that do not include a gasketed lens are required to be sealed and insulated>R-6 for the length of the tube.
23. Examples of durable covers include, but are not limited to, pre-fabricated covers with integral insulation, rigid foam adhered to
cover with adhesive,or batt insulation mechanically fastened to the cover(e.g.,using bolts,metal wire,or metal strapping).
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