<html><head><style>h1 {text-shadow: 1px 1px #111111;}</style></head><body><h1><p style="color:white"><b>Conventional Roof</b></h1></body></html></p>


In conventional roofs, the waterproofing membrane is positioned on top of the insulation. 

DuPont™ Styrofoam™ Brand Deckmate™ XPS Insulation products are designed specifically for use in conventional flat and low-slope roofs. They help your roof resist the elements easily and economically with their direct-to-deck application and ability to deliver thermal performance without the need for a separate thermal barrier.

DuPont’s ultra-strong adhesives offer an alternative to metal fasteners with the added benefits of reduced thermal bridging and improved energy efficiency.

For flat roofs, we also offer solutions with a diminishing plane to create a gentle slope, significantly improving water drainage.

Explore products for conventional roofs.


Typical conventional roof assembly

Single-Ply Roof

Single-ply roofs are lightweight, flexible, cost-effective and quick and easy to install.


Information and ideas

Fully adhered roofs stay put with Styrofoam™ Brand Deckmate and Insta Stik

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