The NRCA Roofing Manual: Membrane Roof Systems—2015 was released in March and updates and replaces The NRCA Roofing Manual: Membrane Roof Systems—2011. Other current volumes in The NRCA Roofing Manual include The NRCA Roofing Manual: Metal Panel and SPF Roof Systems—2012; The NRCA Roofing Manual: Steep-slope Roof Systems—2013; and The NRCA Roofing Manual: Architectural Metal Flashing, Condensation and Air Leakage Control, and Reroofing—2014.
The NRCA Roofing Manual is a best-practices guide for roof system installations in North America. NRCA's best practice approach generally is more conservative than building codes' minimum requirements and may be consistent with or more conservative than manufacturers' requirements.
If you have previous volumes of The NRCA Roofing Manual, you will notice the content flow has changed in the new volume. NRCA acknowledges its manuals are not read cover to cover. Consequently, this volume has been reformatted to be used as a reference manual with roofing contractors and roof system designers in mind. Guides for developing roof system specifications are placed in the first chapter where they can easily be located ahead of component-specific information.