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Technical library detail

Covering Your Options - Cover boards are available in a variety of sizes and materials

Professional Roofing



Cover board; wood fiberboard; perlite; glass-mat-faced gypsum; fiber-reinforced gypsum; mineral fiber; high-density polyisocyanurate; cement; asphalt core

As NRCA’s history of technical bulletins demonstrates, using cover boards with low-slope roof membranes is good roofing practice. Before selecting a cover board, it’s important to review a roof membrane manufacturer’s literature or consult with its technical staff. Roof membrane manufacturers test roof assemblies for wind uplift and fire classification based on the entirety of the components within the assembly, including cover boards.

Note: Documents in this section are provided as Adobe Acrobat PDF files. In order to print and view PDF files, the Adobe Acrobat Reader software/plugin, which runs on Microsoft Windows, Macintosh, OS/2 and various versions of UNIX, must be installed on your computer. Adobe Acrobat Reader is available for download as freeware from Adobe Acrobat's website. Please note that the resolution of on-screen versions is not as high as printed versions of PDF files.

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