A-5.4.1.2.(1) Low-Sloped Membrane Roof Assemblies.

For low-sloped membrane roof assemblies, CAN/ULC-S742, “Standard for Air Barrier Assemblies – Specification”, provides pre-tested prescriptive solutions that have an air leakage rate not exceeding L/(s×m2). The air leakage rate of low-sloped membrane roof assemblies not identified in CAN/ULC-S742 should be determined in accordance with ASTM D8052 / D8052M, “Standard Test Method for Quantification of Air Leakage in Low-Sloped Membrane Roof Assemblies”.