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Is EPDM better than felt?

Author

James Williams

Published May 04, 2026

EPDM is the more affordable option out of the two and has an average price similar to that of a felt roof system. EPDM is also extremely durable and more flexible than GRP when it comes to a building's expansion and contraction, meaning cracks are unlikely.

Accordingly, is rubber roofing better than felt?

Rubber roofing is extremely fire resistant and because you install the roof without a torch (instead using a rubber roofing adhesive) installation is very low risk compared to torching on felt.

Similarly, what is better EPDM or Fibreglass? EPDM is the more affordable option out of the two and has an average price similar to that of a felt roof system. EPDM is also extremely durable and more flexible than GRP when it comes to a building's expansion and contraction, meaning cracks are unlikely.

Simply so, are EPDM roofs any good?

Pro: A LongLasting, low Maintenance Solution That Looks Good EPDM roofing is leagues ahead of some older traditional flat roof material, such as felt for example. Rubber roofing is suitable for extreme conditions, giving you one of the most durable and reliable roofs available that typically lasts between 30-50 years.

What is the best material to use for a flat roof?

Ethylene Polypropylene Diene Monomer (EPDM) is one of the most versatile rubber roofing options on the market. Considered to be one of the best materials for flat roofs, rubber is a popular choice for industrial and commercial applications thanks to its ability to withstand extreme weather conditions.

Related Question Answers

What's the best roof felt?

Klober Permo Air is the most breathable felt on the market and is the perfect choice for unventilated roof spaces or climates where condensation is likely to be a problem.

What is the average cost of a rubber roof?

Rubber Roofing Average Costs For a 1,500 square foot roof, that's an estimated rubber roof cost of $4,000 to $15,000. Rubber roof shingles cost $4.00 to $8.00 per square foot, ($6,000 to $12,000 for a 1,500 square foot roof).

How long will a felt roof last?

The durability of felt is one of its main plus points. Depending on the manufacturer, the minimum guarantee you will receive is 10 years. However, it is commonly thought amongst roofing experts that torch-on felt can last beyond 30 years in many cases. Of course, this is as long as the roof is well maintained.

What is the best felt for flat roof?

A. In my opinion, the latest reinforced torch-on felts are the best material for most domestic flat roofs. They are the modern equivalent of the traditional built-up felt roof covering, where the layers of felt were bedded in hot-poured tar or bitumen.

Are felt roofs any good?

Felt roofs are the cheapest option when it comes to flat roof material, but probably not the prettiest. The modern bitumen felt roofs have good expansion and contraction properties, but may become damaged if they experience foot traffic in hot weather or from window cleaners leaning ladders on them in hot weather.

What does EPDM roofing look like?

EPDM is an extremely durable synthetic rubber roofing membrane (ethylene propylene diene terpolymer) widely used in low-slope buildings in the United States and worldwide. Its two primary ingredients, ethylene and propylene, are derived from oil and natural gas.

How long will a rubber flat roof last?

50 years

Can you lay roofing felt on top of roofing felt?

When felting over any old felt you can use a bitten primer to get a proper fix, some felts are also a 3 layer system allowing them to go over old felt, however if he has quoted for old felt to be removed then that is what he should have done. Any old felt roof needs to be completely taken up and re boarded.

How long will an EPDM roof last?

50 years

Does EPDM have to be glued down?

While the rubber roofs are known to be durable, they also need maintained. EPDM roofs are fully adhered or as many call it glued down. The system is not attached mechanically. With EPDM rubber roofs being glued down roofs, the roof must be maintained because seams will need adjusting, as they can start to pull apart.

Can you walk on EPDM roof?

Can you walk on a rubber (EPDM) roof - Yes, but only to an extent. All RKD Rubber Roofing Systems are designed to enable LIGHT foot traffic during installation and for any occasional cleaning or maintenance. The Resitrix membrane is reinforced and thicker than standard EPDM.

What goes under EPDM?

EPDM should be bonded over 5/8" plywood, 5/8" OSB board, or polyisocyanurate board with a fiberglass backing.

Does EPDM shrink?

Roof shrinkage affects roofs that rely on synthetic rubber membranes most commonly ethylene propylene diene monomer (EPDM). Despite its durability compared to other rubbers, EPDM naturally shrinks over time—several factors can speed up EPDM shrinkage.

What is the best EPDM roof coating?

Dicor RPCRC1 White EPDM Rubber Roof Coating The Dicor RPCRC1 is one of the most recommended products in the waterproofing and protecting coating for RV roofs. It is a good choice because of its great adhesion. The product is an acrylic coating, which is packed conveniently for ease of use.

Can EPDM be installed on plywood?

You can install EPDM membrane over an existing roof only if a new layer of 5/8" plywood, 5/8" OSB board or polyisocyanurate board with a fiberglass backing is used as a barrier to protect the EPDM.

What does EPDM stand for?

Ethylene Propylene Diene Monomer

What is the best roofing material for a low pitch roof?

Modern low-slope roof or flat roofs tend to use a continuous membrane covering which can better resist pools of standing water. These membranes are applied as continuous sheets, bonded together with heat-welding or adhesives. A more expensive low-slope or flat roof option include sealed metal roofs using copper or tin.

Do Fibreglass roofs crack?

A common problem encountered with a GRP roof is the flaking and cracking of the top coat. The main reason for a GRP roof cracking is due to the roof being poorly installed. During the summer months, heat causes the fibreglass roof to heat up during the day and expand.

Which is best EPDM or GRP?

This is why EPDM is the better option between the two for larger roofs. EPDM is not easily affected by the sun and is resistant to blistering, cracking and rotting. The same can be said for GRP, which is the least likely to develop moss and extremely resistant to UV damage.

How do you fit a EPDM flat roof?

  1. Roof Deck Preparation. Clean the roof surface prior to installation.
  2. Install Drip Batten. Install the Drip batten wherever a gutter is present.
  3. Install Drip Back Drip Trim. The Drip Trim has a front and back piece.
  4. Chase out Wall Upstand.
  5. Relax Rubber Membrane.
  6. Fold Membrane Halfway.
  7. Apply Deck Adhesive.
  8. Sweep EPDM Membrane.

Do GRP roofs crack?

A common problem encountered with a GRP roof is the flaking and cracking of the top coat. The main reason for a GRP roof cracking is due to the roof being poorly installed. During the summer months, heat causes the fibreglass roof to heat up during the day and expand.

Is a Fibreglass roof noisy?

Where there is sometimes a noise problem experienced with these type of roofs, it is usually due to the expansion and contraction of the decking through the seasons due to the boards dimensionally reacting to thermal and moisture content changes.

What is EPDM roofing?

EPDM is an extremely durable synthetic rubber roofing membrane that is used worldwide. Its superior durability and cost-effectiveness are part of what makes EPDM one of the most popular flat roof systems installed in the U.S. today.

Is a fiberglass roof good?

Fiberglass roofing is a great option for your roof installation project because it is a tough and very resilient material that is non-porous, does not change shape, and won't dry out. Fiberglass is a very popular roofing shingle type.

Are Fibreglass roofs any good?

Most fibreglass roofs are guaranteed for 25 years but can last much, much longer if well looked after. Fibreglass is the most expensive of the options due to material costs, and although it is not as flexible as rubber it is incredibly resistant to damage and repairs are very easy and almost un-noticeable.

Are Fibreglass flat roofs any good?

As well as being more durable than traditional felt systems like pour-on or torch-on, GRP fibreglass is also a lot safer a solution. The chances of an on-site injury occuring are significantly less with fibreglass flat roof systems as it does not require any open flame or any other complicated or hazardous tools.

What is the longest lasting flat roof?

Metal Roofing Metal is different from most other commercial roofing material types for a few reasons. Due to the expert installation process and the nature of the material, metal is the most expensive roof type to have installed. However, metal roofing has the longest lifespan, lasting between 20 and 30 years.

Can you put EPDM over felt?

Is the surface suitable for an EPDM rubber roof? Asphalt and shingles aren't suitable for a rubber membrane to be bonded onto. However, for surfaces such as felt, overboarding and adding an EPDM rubber roof is ideal for adding protection to it and further insulating your roof.

Which is better TPO or EPDM?

EPDM has a dark surface, which in summer conditions will absorb heat, forcing cooling systems to work overtime, whereas TPO roofing reflects sunlight, allowing commercial air conditioners to work more efficiently. TPO also has a somewhat higher resistance to punctures than EPDM.

What is the most durable roofing material?

The Most Durable Roofing Materials
  • Asphalt Shingles. Asphalt shingles are very popular in the US for their affordable pricing and cost-effectiveness.
  • Wooden Shingles.
  • Metal Roofing.
  • Plastic Polymer.
  • Slate Shingles.
  • Solar Glass Roofing.

What material is used on a flat roof?

There are mainly three types of Flat Roof Materials commonly used for flat roofs. The three types of flat roofing materials are: EPDM Rubber:(Ethylene Propylene Diene Monomer) A common use is in vehicles: door seals, window seals, trunk seals, and sometimes hood seals. The synthetic rubber is also used for flat roofs.

How many layers should a flat roof have?

two layers

How do you insulate a flat roof?

How do you insulate a flat roof?
  1. Lay 12mm of plywood or OSB board across the timber joists as a base for the flat roof build up.
  2. Install a vapour control layer to reduce the risk of condensation and moisture compromising the flat roof structure.