Specifications 2 1 o - CJ a7
t iar 93� , / R0( Built Up Roofing Specifications
,Jo s Manville S
hn Manvill Specification 4GIS
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Four Ply Smooth Surfaced Fiber Glass Built -Up Roof. For
use over JM insulation, approved decks or other approved Non- Nailable Deck
or Approved Insulation
insulations, on inclines of up to 6 , r per foot (500 mm/m).
Concrete Primer
For Regions 1, 2 and 3 (If Required)
Materials per 100 sq. ft. (9.3 m') of Roof Area
Asphalt
Concrete Primer (If required): 1 gallon (3.8 liters)
2"
Felts: GlasPly Premier or GlasPly IV 4 plies a
Asphalt (Interply): Trumbull or other JM Approved Asphalt — — V.V I -
Incline per foot Asphalt Nominal Weight °
Up to 1" (25 mm) 170 °F, Type II, Flat 92 lbs. (42 kg)
1" to 3" (25 to 76 mm) 190 °F, Type III, Steep 92 lbs. (42 kg) n 8 i /z" Exposure t
3" to 6" (76 to 152 mm) 220 °F, Type IV, Special Steep 92 lbs. (42 kg) GlasPly Premier or
0 to 6" (0 to 152 mm) PermaMop 92 lbs. (42 kg) m N GlasPly IV
Surfacing: VI I Surfacing
Topgard Type A 1 - 2 gallons (6.6 - 7 6 liters) +
Topgard Type B — Fibrated 2 - 3 gallons (7.6 - 11.4 liters) 4GIS
Asphalt (Type consistent with slope) 15 lbs. max (6.8 kg)
Fibrated Aluminum Roof Coating* 2 gallons (7 6 liters)
Application
Approximate installed weight 112 - 160 lbs. (51 - 73 kg)
Note: On roof decks with slopes up to 2" per foot (166.6 mm /m), the roofing
* For immediate application of Fibrated Aluminum Roof Coating, apply over felts may be installed either perpendicular or parallel to the roof incline.
• Topgard Type B which has been allowed to dry Otherwise, apply over asphalt
surfacing which has been weathered over one season On slopes over 2" per foot (166.6 mm /m), refer to Paragraph 6.11 of this
section for special requirements
General Using GlasPly Premier or GlasPly IV, apply a piece 9" (229 mm) wide, then
over that, one 18" (457 mm) wide, then over that, one 27" (686 mm) wide.
This specification is for use over any type of approved structural deck Over these 3 partial sheets, install a full width 36" (914 mm) piece. The
which is not nailable and which offers a suitable surface to receive the following felts are to be applied full width, overlapping the preceding felts
roof. Poured and pre -cast concrete decks require priming with JM by 27 (699 mm) so that at least 4 plies of felt cover the substrate at all
Concrete Primer prior to application of hot asphalt. locations. Install each felt so that it is firmly and uniformly set, without
This specification is also for use over JM roof insulations or other voids, into the hot asphalt (within ±25 °F [ ±14 °C] of the EVT) applied just
approved rigid roof insulations, which are not nailable and which offer a before the felt at a nominal rate of 23 lbs. per square (1.1 kg/m') , over the
suitable surface to install the roof. Specific written approval is required entire surface. Installation over porous substrates such as roof insulation
for any roof insulation not manufactured or supplied by JM. Insulation may require up to 33 lbs of hot asphalt per square (1 6 kg /m
should be installed in accordance with the appropriate JM Insulation
Specification detailed in the current JM Commercial /Industrial Roofing Surfacing
Systems Manual. This specification can also be used in certain reroofing Finish the entire membrane surface with a uniform application of the
situations. Refer to the "Reroofing" section of the JM Commercial/ selected coating. Refer to Paragraph 6.9.3 of this section for more specific
Industrial Roofing Systems Manual. This specification is not to be used information regarding the particular coating. Pay particular attention to
directly over poured or pre -cast gypsum or lightweight, insulating the installation directions printed on the label of the container for the
concrete fills. chosen coating.
Design and installation of the deck and /or substrate must result in the Asphalt
roof draining freely and to outlets numerous enough and so located as to
remove water promptly and completely. Areas where water ponds for Asphalt should meet the requirements of ASTM D 312.
more than 24 hours are unacceptable and are not eligible to receive a JM Guarantees require the use of Trumbull asphalt or another JM
JM Roofing Systems Guarantee. Approved Asphalt. The Contractor must provide an Asphalt Confirmation
Note: All general instructions contained in the current JM Commercial/ Number (ACN) on projects which require a JM Guarantee. The ACN will
Industrial Roofing Systems Manual should be considered part of this indicate that the asphalt was registered with the approved asphalt
specification. source
Check with a JM Technical Services Specialist for special asphalt
Flashings requirements in hot climates.
Flashing details can be found in the "Bituminous Flashings" section of the
JM Commercial /Industrial Roofing Systems Manual.
For an identical copy of this specification, ask for RS -2030.
6 -11