What is an EPDM rubber roof

EPDM is a rubber membrane used in suitable low-slope applications. The roof assembly also includes details around seams, penetrations and edges.

For an existing roof, ask whether the crew can confirm the membrane and its condition. If you are comparing installation scopes, check how each proposal covers seams, edges and transitions.

Talk with Dekoven Roofing about which materials and installation options may fit your roof.

What EPDM is

EPDM is a synthetic rubber membrane used on flat and low-slope roofs. It comes in large sheets, which means fewer seams than many other flat roof systems, and it is commonly used on homes, additions and commercial buildings.

How it is installed

The membrane is attached or adhered to a prepared surface, with seams and details such as edges, walls and penetrations finished with compatible materials. How well those details are built often matters more than the sheet itself.

Where it fits

• Flat and low-slope roofs with suitable drainage.
• Additions and porch roofs.
• Commercial buildings where the system is specified.
• Roofs where the deck and insulation are in sound condition.

What to ask

Ask which membrane thickness and attachment method are proposed, how seams and flashing are handled and what the manufacturer's terms cover.

Frequently asked questions

Is EPDM good for Wisconsin winters?

It is used in cold climates, but the installation details and drainage matter. Ask the roofer how the proposed system suits your building.

Can EPDM be repaired?

Localized damage can often be repaired with compatible materials once the cause is identified.

Related: Ask which roofing system fits your property