EPDM Roofing

Ethylene Propylene Diene Monomer (EPDM) roofing is a type of thermoset membrane roof material. It is the most common material used to create rubber roofs, and is derived from oil and natural gases. EPDM roofs are widely used in commercial and residential applications.

Features

An EPDM roof is a single-ply rubber membrane ranging from about 45 to 60 mil in thickness. It is sold in rolls that can be as wide as 50 feet, though many rubber roofs require much narrower EPDM materials. The most common EPDM materials provide a smooth black finish, though some have pigments or dyes added to create a white finish. This white finish helps the roof to reflect the sun’s rays and keep the inside of the building cooler in climates with warmer average temperatures.

An EPDM roof is primarily designed for flat or lowslope roofing structures. While traditional shingles or rolled roofing may not perform well on flat roofs, rubber is bonded at the seams to create a continuous barrier. This allows EPDM roofing to keep water from penetrating the roof structure and leaking into the building. Rubber roofing also helps to protect commercial roofing against wind and other exterior elements.

Installers may use one of several methods to install an EPDM roof. A fully adhered system is glued to the deck using roofing adhesive. Mechanically fastened rubber roofs are attached using nails or screws along each loose edge of material. Loose-laid systems are fastened only around the perimeter, and are coated with gravel or aggregate to help weigh down the loose-laid sections. All rubber roofs use heat-sealed seam tape to ensure a watertight installation.

Benefits

Like all rubber roofs, EPDM systems are very lightweight and easy to install. They are extremely effective at waterproofing a roof structure, and last for many years with little to no maintenance. EPDM is also flexible, and can be installed on any type roof regardless of shape or design. These roofs can also be patched fairly easily when damaged by punctures or tears.

Fully Adhered White EPDM

ISO or other approved
substrate

– Fasteners & 3” Plates
– Insulation Adhesive
Standard, LVOC or Water Based Bonding Adhesive
EPDM Membrane
Cleaner/Primer

– All surfaces that will contact seam tape
3” Seam Tape

Mechanically Attached EPDM – ‘Bar-In-Seam’ Method

ISO or other approved substrate
– Fasteners & 3” Plates
– Insulation Adhesive
Any EPDM Membrane
– Max. 10’ Wide
Membrane Attachment
– Metal Anchor Bar, Polymer Batten Strip or Seam Plate
– Fastener
Cleaner/Primer
– All surfaces that will contact seam tape
7” Seam Tape

Ballasted EPDM

ISO or other approved substrate
– Fasteners & 3” Plates
– Insulation Adhesive
Standard, LVOC or Water Based Bonding Adhesive
– Applied to substrate & bottom of membrane
Any EPDM Membrane