Garland Combustible Deck (AC-48)
Slope: 2:12
- ½”Wood fiber, 1-1/2” polyisocyanurate, ½”Dens-Deck
Note: When insulation is not used, HPR Glasbase, HPR Premium Glasbase, VersiPly 40, or 1-ply ASTM D4601 Type II Base Sheet mechanically fastened is required.
1a.) Optional: VaporSmart SA membrane
- Minimum, 1 ply of HPR SA FR (Self Adhesive), OR StressBase 80, FlexBase Plus 80, FlexBase E 80, StressBase 120, FlexBase 80, VersiPly 80 or OptiMax. Adhered with Weatherking, Green-Lock Plus, or ASTM-D312 Type IV roofing asphalt.
- Minimum, 1 ply StressPly SA FR Mineral (Self Adhesive), OR VersiPly Mineral, StressPly Mineral, StressPly FR Mineral, StressPly EUV FR Mineral, StressPly EUV, StressPly Legacy FR Mineral, StressPly Plus FR Mineral, StressPly Max, OptiMax FR Mineral, StressPly Legacy FR Mineral; Adhered with Weatherking, Green-Lock Plus, or ASTM-D312 Type IV roofing asphalt**
- Primer: Garla-Block 2K Primer applied at 0.5 gal./sq; Allow to dry completely.
- Coating: White-Star Adhesive applied at 2.0 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'
- 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.
