For Commercial ProfessionalsChange

Ballasted Waterproofing PRMA / Concrete Deck

In a Ballasted Waterproofing PRMA (Protected Roof Membrane Assembly) Concrete Deck roof system with Ballasted Single-Ply Insulation, a waterproof membrane goes over the concrete deck before the insulation board is installed, then ballast goes over a protective mat, holds the insulation in place and protects it from solar loading. The PRMA ensures a consistent moistureproof seal. Ballast, smooth 2” x 2’ x 2’ concrete pavers, water worn gravel or crushed stone, hold system in place.

Products for this Application

UL Fire Tested Assembly, UL 1256, Under Deck Flame Spread