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  • FLEXI PROOF® One Piece EPDM Rubber Roofing Membrane for Flat Roofs information

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EPDM Rubber Roofing FAQs - your questions answered


EPDM Rubber Roofing FAQs 

EPDM (Ethylene Propylene Diene Monomer) is a type of synthetic rubber that is manufactured for all types of sealing products, including door seals and garden and household appliance hoses. In sheet format, EPDM’s unique properties make it the perfect material for all flat roofing applications:

  • EPDM repels all weather conditions.
  • EPDM has been proven to last in excess of 50 years.
  • EPDM is easy and quick to fit.
  • It’s flexible and bends easily with no stress, which means a perfect fit.
  • It stretches, with up to 300% elongation, so allows for typical building movement.
  • Its performance isn’t affected by extremes of temperature, and is proven to be stable between -30°C and +120°C.
  • EPDM roofing membranes are installed using a cold applied system – no naked flames required, making it a far less risky process.
  • EPDM doesn’t tear, split or crack with age.
What is EPDM?

Not at all! EPDM was first manufactured in America in the 1960s, and it has been used successfully all over the world ever since.

Are EPDM rubber roofing membranes new?

Unlike other, more widely known flat roofing materials, such as felt, the evidence from both laboratory tests and actual installations suggests that, when correctly installed, an EPDM flat roof will last in excess of 50 years.

How long will an EPDM rubber roof last for?

It is estimated that over 1.3 billion square metres of EPDM flat roof membrane have been installed worldwide, and in climates as extreme as the Middle East and Alaska.

How proven are EPDM rubber roofing membranes?

EPDM has an outstanding slate grey smooth finished appearance. A smart finish on any property, tt also complements slate and tiled roofs of period properties, making EPDM a highly versatile roofing material.

What does an EPDM rubber roof look like?

Because of our changeable climate a dark coloured roofing membrane is always preferable. EPDM attracts and collects more heat, so saving energy and reducing the demand for heating – it can actually help reduce your energy bills. And because of the reduced heating demand, EPDM rubber flat roofs create fewer carbon emissions, making it far more environmentally friendly than other flat roofing materials. Naturally, you’ll still need to ensure there is good insulation within your roof structure.

EPDM is a dark slate-grey colour, what impact will that have on my property?

EPDM is suitable for virtually all flat and low sloping roofs, whether you need to replace an old roof on your garage or are building a new extension.

Is an EPDM rubber roof suitable for my flat roof?

Yes you can! However, if you need regular access to the roof area, we recommend that you use our specially designed walkway pads, timber decking or tiles to prevent the possibility of damage.

Can I walk on it?

No, despite its considerable technical advantages, EPDM compares well with other quality flat roofing systems in terms of cost and, because it has a long lifespan, it will also often work out to be more cost effective in the long term – many other systems will last as little as 10 years or require regular repairs. And because installation is generally simpler and faster than other roofing systems, you’ll also save on labour costs.

It sounds too good to be true – is an EPDM rubber roof expensive?

EPDM is one of the most environmentally friendly materials used today in the construction industry. In fact, the International Kyoto Ecology Agreement recommends EPDM as the best value sustainable eco-sound roofing available. The amount of energy required during the manufacturing process is far lower than other materials, and the cleaners, primers and adhesives used during installation have been developed specifically to reduce VOC (Volatile Organic Compound) emissions. Post-industrial products can be recycled, used in the manufacturing of other roofing products and accessories, such as walkways and roofing tiles, which then reduces the impact on landfill.

Is EPDM environmentally friendly?

Insulating a flat roof can deliver real benefits – a warm comfortable room, lower energy bills and improved energy performance ratings.

An EPDM flat roof system has superior weathering properties, but it doesn’t remove the need for good insulation. Insulation is also a compulsory requirement if you are to comply with building regulations, particularly on residential roofs. In April 2006, the revised Part L of the building regulations came into force, with the aim of reducing the energy used in buildings.

Do you still need to use insulation with an EPDM rubber roof?

Both ClassicBond and DuoPly EPDM hold the coveted British Board of Agrement certificate. Download the certificates for ClassicBond and DuoPly EPDM for full details.

Do ClassicBond and DuoPly EPDM rubber roof membranes have British Board of Agrement (BBA) certificates?