The topics include thermoplastic polyolefin roof membranes exposed in the western US for seven years, principles of design and installation of below-grade and building deck waterproofing in 2010, dual barrier protected membrane roof assemblies,
roofing assembly simulated heat and light test, and electrical conductance methods for locating leaks in roofing and waterproof membranes.
These additional standards will enable PV module manufacturers and others to certify their products when used as part of an FM Approvals
roofing assembly.
Cost is another consideration, and the entire
roofing assembly and its location must be considered, Tendler notes.
A non-destructive evaluation investigates moisture penetration into a
roofing assembly. Several types are available, including capacitance, nuclear, and infrared.
Another resource, Modified Bitumen Design Guide for Building Owners, contains information on the total
roofing assembly, deck materials, roof insulation, vapor retarders, primers, asphalt adhesives, base sheets, ply sheers, membrane modified bitumens, surfacing, flashings, and accessories.