This updated version of the NRCA Roofing Manual provides you with the latest information about condensation and air leakage control. It contains comprehensive information about condensation and air leakage and vapor retarders and air retarders for low- and steep-slope roof systems. The guidelines also present the latest information about design considerations for vapor retarder placement, attic ventilation and applicable building code requirements and contain all the information regarding condensation and air leakage control from The NRCA Roofing Manual: Architectural Metal Flashing and Condensation and Air Leakage Control—2018.

Item # 4000e