MBTechnology Combustible Deck (AC-1)
Maximum Slope 1:12
- Optional: Glass Fiber Taped Joints
- Optional Insulations: Minimum 1/2” thick, glass fiber, wood fiber, phenolic, perlite, polyisocyanurate, polyisocyanurate composite, or EPS/perlite composite
NOTE: When EPS insulation is applied over a metal or combustible deck, a thermal barrier complying with section 2603.4.1.5 or applicable current section of the IBC is required.
- 1-Ply Layflat SBS LF25, Layfast SBS TU35, Layflat SBS LF25W, Layflat SBS LF40, Layfast SBS TU43, Layflat SBS LF40W, Layflat SBS LF60, Layfast SBS TU70, or Layflat SBS LF60W; mechanically fastened or fully adhered with ASTM D312 roofing asphalt, hot mopped, or ASTM D3019 cold process adhesive.
- 2-, 3-Plies Layflat SBS LF25, Layfast SBS TU35, Layflat SBS LF25W, Layflat SBS LF40, Layfast SBS TU43, Layflat SBS LF40W, Layflat SBS LF60, Layfast SBS TU70, or Layflat SBS LF60W; fully adhered with ASTM D312 roofing asphalt, hot mopped, or ASTM D3019 cold process adhesive, each ply.
- Coated with ASTM D1227 asphalt emulsion with clay or aluminum pigment reflective additive applied at a minimum coverage rate of 3 gal./sq.
Note: The component materials of each system must be applied in the order in which they are listed above.
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'
- NFPA-256 - National Fire Protection 'Standard Method of Fire Tests of Roof Covering'
- UBC-15-2-94 - Uniform Building Code 'Test Standard for Determining the Fire Retardancy 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.
