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FAQ's
Find quick, clear answers to our most frequently asked questions about product ordering, delivery schedules, trade accounts, and technical support.
Frequently Asked Questions
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EPDM stands for Ethylene Propylene Diene Monomer, a type of synthetic rubber used as a single-ply waterproofing membrane for flat and low-pitched roofs.
EPDM is available in rolls and sheets and is bonded to the roof deck using specialist adhesives. It is widely used on everything from domestic extensions and garages to commercial buildings and large flat roof projects.
With correct installation and basic maintenance, EPDM rubber roofing can last more than 50 years, making it one of the longest-lasting flat roofing materials available. Its synthetic rubber composition allows it to remain flexible and stable across a wide temperature range, resisting cracking, splitting, and degradation over time.
Yes, EPDM is particularly well suited to the UK's often wet, variable climate. It remains flexible and stable in temperatures ranging from -45°C to +120°C, which means it won't crack or split due to frost, freeze-thaw cycles, or summer heat. Its seamless waterproofing properties make it highly resistant to heavy rain, and it offers excellent UV resistance without degrading under prolonged sun exposure.
EPDM stands out from alternatives like felt and bitumen-based systems in several key areas:
Lifespan: EPDM significantly outlasts traditional felt, which typically needs replacing every 15 - 25 years, with cheaper options failing around 10–12 years.
Low maintenance: Once installed correctly, it requires very little ongoing upkeep.
Weather resistance: Superior resistance to rain, UV, and temperature extremes.
Cost-effectiveness: Lower long-term costs due to reduced maintenance and replacement frequency.
EPDM is designed for flat and low-pitched roofs. It is ideal for residential extensions, garages, outbuildings, sheds, porches, bay window roofs, and commercial flat roof applications.
It can be laid over timber decks and is also compatible with some existing substrates, including asphalt, with the correct fleece-backed membrane specification. It is not recommended for steep-pitched roofs, but for anything with a low pitch or completely flat profile, it is one of the most reliable options available.
Yes. Roofbase holds extensive stocks of EPDM rubber roofing membrane as well as the full range of accessories needed to complete an installation, including bonding adhesives, primer, seam tape, trims, flashings, and detailing products.
Having everything in one place means you won't need to source products from multiple suppliers, reducing project delays and ensuring system compatibility. Visit or contact your local Roofbase branch to confirm current stock availability.
Yes. At Roofbase, EPDM membrane can be sold by the length or cut to size, so you only pay for what you need. This is particularly useful for smaller or awkward roof shapes where buying a full roll would result in unnecessary waste.
Yes. Roofbase offers delivery to areas around each of their branches. For specific delivery areas, lead times, and any applicable charges, get in touch directly with your local Roofbase branch.
Absolutely. Every Roofbase branch is staffed by a team with extensive roofing product knowledge. Whether you're new to EPDM and want guidance on which system is right for your project, or you are an experienced contractor looking for specific product specifications and compatibility advice, the team can help.
EPDM is widely regarded as one of the most eco-friendly roofing materials available, and has been highlighted by environmental organisations, including Greenpeace, as a lower-impact, sustainable choice for flat roofing compared to alternative products.
This is due to EPDMs sustainability and extended life span, as well as its reusability and how, once retired, it can be recycled safely and effectively.
Very little. EPDM is one of the lowest-maintenance flat roofing materials available. Once correctly installed, it does not need painting, re-sealing, or regular treatment. It does not support moss or algae growth in the way some other materials do, which further reduces upkeep.
A basic annual visual inspection, checking for tears and punctures, debris build-up, and ensuring drains and gutters are clear , is generally sufficient to keep an EPDM roof performing well for decades. If any minor damage does occur, EPDM is easy and inexpensive to repair using patch kits, without the need to replace the entire membrane.
It’s also advisable to check a flat roof after a period of adverse weather too.
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