EPDM is a synthetic rubber membrane used on flat roofs. It has become popular because it is durable, flexible and has few joints. Homeowners often ask how long it will last, and the honest answer is that it depends on several things rather than one number.
The material
EPDM is designed to resist sunlight, temperature changes and weather, and it does not rot or rust. Good-quality membrane, in a suitable thickness, is made to give many years of service. Quality varies between products, so the make and thickness matter.
The installation
How well the roof is laid has a large effect. The deck must be sound, clean and dry, the sheet bonded evenly without trapped air, and the edges, upstands and corners finished carefully. Most failures of EPDM roofs are caused by poor detailing at edges and joints, and not by the rubber itself.
The build and drainage
Ponding water and poor falls put extra stress on the membrane, and blocked outlets cause problems. A roof with proper falls and clear drainage is easier on the covering.
Maintenance
EPDM needs little maintenance, but it should still be looked at from time to time. Clear leaves and debris, keep outlets and gutters clear and check edges and seams. Small issues, such as a lifted edge, are easy to repair if caught early.
Damage
Sharp objects, heavy foot traffic and tree branches can puncture a membrane. Using protective walkways where people need access helps.
What to expect
Rather than relying on a number from a brochure, ask your roofer about the product, the guarantee, if any, that comes with it and how the roof will be detailed.
See our EPDM Rubber Roofing section or call 07766 547309.
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