Tremco/GP Gypsum Dens-Deck:

Tremco/GP Gypsum Dens-Deck

A Fiberglass Mat Faced, Moisture Resistant, Gypsum Roof Board

Tremco/GP Gypsum Dens-Deck is used as a nonstructural roof board in a variety of low slope roof system configurations.  It is recommended as an overlayment board for isocyanurate insulation in cold applied BUR and MB roof systems, and can be used as a substrate for our single ply roof systems.  Tremco/GP Gypsum Dens-Deck can be used in a variety of nonstructural roofing applications.


Tremco/GP Gypsum Dens-Deck consists of a water resistant, silicone treated gypsum core, faced with embedded fiberglass mats on the top and bottom of the board.  Dens-Deck meets ASTM C 1177/C 1177M-99, the Standard Specification for Glass Mat Gypsum Substrate for use as sheathing.

Roofing & Weatherproofing Peace of Mind

We deliver peace of mind to building owners and facility managers by managing roofing and building life cycles for customers in all industries, including education, healthcare, government, manufacturing and more.

  • Tremco Roofing offers the industry's most comprehensive roofing and weatherproofing solutions for restoration, repair, maintenance, replacement and new construction.
  • WTI (Weatherproofing Technologies, Inc., a subsidiary of Tremco Incorporated), provides roofing services, construction management and general contracting.
  • Our Canam Building Envelope Specialists affiliate provides building envelope solutions to eliminate air leaks, improve energy efficiency and reduce costs.


US: 1.800.852.6013

Canada: 1.800.668.9879