Garland Combustible Deck (AC-48)
Slope: 2:12
- Optional insulation: ½”Wood fiber, ½”glass fiber, 1-1/2” polyisocyanurate, ½”perlite, ½”Dens-Deck.**
Note: when EPS insulation is applied over a metal or combustible deck, a thermal barrier complying with section 2603.4.1.5 of the IBC is required.
Note: When insulation is not used, 1-ply ASTM D4601 Type II Base Sheet or 1-ply VersiPly 40, mechanically fastened, is required.
1a.) Optional: Garland VaporSmart SA membrane
- Minimum, 1 ply of HPR SA FR (Self Adhesive), OR Stress Base 80, Flex Base Plus 80, Flex base E 80, Stress Base 120, Flex Base Plus 120, Stress Base E 120, Flex Base 80, Flex Base 120, VersiPly 80 or OptiMax. Adhered with Weatherking, Green-Lock Plus, Green-Lock Plus White or ASTM-D312 Type IV roofing asphalt,
- Minimum, 1 ply StressPly SA FR Mineral (Self Adhesive), OR VersiPly Mineral, Stress Ply Mineral, Stress Ply Mineral FR, Stress Ply EUV SPF FR Mineral, Stress Ply EUV Mineral, StressPly EUV, Stress Ply E FR Mineral, Stress Ply E Mineral, StressPly Plus FR Mineral, StressPly Max, BiFlex Cap, BiFlex Mineral Cap, OptiMax FR Mineral, Legacy FR Mineral; Adhered with Weatherking, Green-Lock Plus, Green-Lock Plus White, or ASTM-D312 Type IV roofing asphalt,**
- Primer: Garla-Block 2K Primer applied at 0.5 gal./sq; allowed to dry completely.
- Coating: Green-Lock Plus White flood coat applied at 5.0 gal./sq, covered with 3/8" diameter roofing gravel applied at 150 lbs./sq.
**ADDITIONAL NOTES:
- The component materials of each system must be applied in the order in which they are listed above.
- VersiPly 80, StressPly, StressPly E, and StressPly Plus may be used with this deck configuration in number 3 noted above with the restriction that they must be used in conjunction with an approved base sheet in number 2 noted above which has a thickness of at least 120 mil, (multiple base sheets may be used in this instance such that the combined thickness of the base sheets is equal to or greater than 120 mil). Cap sheet is to be adhered with Weatherking, Greenlock, or ASTM-D312 Type IV roofing asphalt.
- When insulation described in number 1 noted above is used, the base sheet described in number 2 above becomes optional when using an approved cap sheet as described in number 3 which is 115 mil or thicker, (multiple ply sheets which are approved for use with this deck may be used in lieu of one cap sheet such that the combined thickness of the sheets used is equal to or greater than 120 mil).
Evaluated to the following:
The roof covering systems in this section have been evaluated for external fire resistance Classifications A, B, C as outlined by the following test methods:
- ASTM-E108 - American Society for Testing & Materials 'Standard Methods of Fire Test of Roof Covering'
- FM-4470, Section 5.1.A - Factory Mutual 'Standard Method of Test for Fire Resistance of Roof Covering Materials'
- ULC-S107 - Underwriters' Laboratories of Canada 'Standard Method of Tests for Fire Resistance of Roof Covering Materials'
- UL-790 - Underwriters' Laboratories Inc. 'Tests for Fire Resistance of Roof Covering Materials'
Each system listing identifies the deck substrate as either non-combustible or combustible. Systems evaluated for combustible decks will provide the same ratings when applied over non-combustible decks. Unless otherwise noted in individual listings, combustible decks shall be sheathed with a minimum 15/32" veneer plywood or minimum 7/16" non-veneer APA rated sheathing panel (oriented strand board panels, structural particleboard panels, composite panels or wafer-board panels) or 3/4" thick solid wood sheathing boards. The component materials of each system must be applied in the order in which they are listed. All components of the system must be listed for external fire exposure by an agency acceptable to the AHJ.
Some Roof Covering Systems have been evaluated for other performance characteristics, in addition to external fire exposure. Where applicable, such additional performance characteristics are noted within the specific listing.
In all cases, manufacturer's instructions should be consulted for installation procedures and details not covered by these listings.
Listed Materials are identified by a label or marking bearing the wording, "Listed Roofing Component", a reference number or code and the WHI Certification Mark.
