Dens-Deck Roof Board is an exceptional fire barrier, thermal barrier and recovery board used in various commercial roofing systems. The patented Dens Deck design employs glass mat facings front and back that are embedded into a water-resistant gypsum core, providing excellent fire resistance, moisture resistance and wind uplift properties. The unique construction of Dens Deck provides excellent flute spanning that stiffens and provides increased foot traffic resistance to the roof deck. Additionally, Dens Deck has been shown to withstand delamination, deterioration, warping and job-site damage more effectively than other roofing membrane substrates such as paper-faced gypsum board, fiberboard and perlite insulation.