DensDeck® Roof Board

With fiberglass mats and a noncombustible gypsum core, is designed to address
persistent challenges inherent in commercial roofing assemblies.

As a thermal barrier, DensDeck panels provide needed fire resistance in FM Class 1
roofing systems. In mechanically attached single-ply membrane systems, DensDeck
is ideal as a noncombustible underlayment over the structural deck.

http://www.buildgp.com/roofboard_densdeckbrand


SECUROCK

Gypsum-fiber roof board employs advanced technology in delivering an exceptionally
strong, high-performance board for use in low-slope commercial roofing systems.

The board's dense concentration of gypsum and cellulose fibers provides exceptional panel
and bond strength, low surface absorption, and superior wind-uplift performance with no
face layer to delaminate.

http://www.usg.com/securock-roof-board.html