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What Is GRP Roofing (UK)?

What Is GRP Roofing

GRP (Glass-reinforced Plastic) is a type of composite material that combines glass fibre with resin. It’s used in many different applications, including commercial and residential roofs. Grp roofing is also known as fibreglass roofing. It is a type of flat roofing system.

It can be made into sheets or panels. The most common thicknesses are 1/2″ and 3/4″.

The advantage to using this kind of roofing is it has very low maintenance costs. However, it does require some additional work from roofers at the installation site.

The primary function of GRP is as a structural component. The strength of the material comes from its ability to be moulded into complex shapes with little or no warping. This allows it to be used in many different applications such as boat hulls, windscreens, car bodies and even aircraft wings. Because of this versatility, GRP is often used where other materials would simply break under the strain.

Benefits of GRP Roofing

GRP is a lead-free product and has been since it was first introduced on the market. This means that it will not leach any harmful chemicals into your home or business environment. It also means, if you are having a roof replacement, that it can be installed over existing roofs without having to remove them.

Roof Repair & Maintenance

GRP roofing comes with an average life expectancy of around 20 years. This is longer than traditional asphalt shingle roofs which last only 10 years. GRP roofs are a great alternative to lead-based products such as EPDM and PVC. They are also much more environmentally friendly than their predecessors.


Installing GRP roofing is fairly easy. There are two main types: single-ply and multi-ply. Single-ply GRPs come in several different colours and have a smooth surface finish. Multi-ply GRPs are available in black, white and grey. Both types of GRP are relatively inexpensive and can be installed by just about anyone.

GRP roofing is also easier to install because there are fewer seams to seal. This makes it less prone to leaks.

GRP vs EPDM Flat Roofing

EPDM (Ethylene propylene diene monomer) is a rubber-like polymer that can be used as a single layer or in combination with other materials such as polyethylene and bitumen. It’s an ideal choice for commercial buildings because it’s flexible, durable and easy to install.

Advantages of EPDM roofing

Some of the advantages of EPDM include:

  • Longevity up to 30 years
  • Does not crack or split
  • Sun resistant
  • Moss free


EPDM – Maintenance should only be carried out when required. This includes cleaning off any dirt and debris that gets into the seams, checking for any signs of damage to the membrane, and repairing tears or holes.

GRP – Because GRP is a product that is manufactured from recycled materials, it does not require regular maintenance. However, you need to check for any signs of damage and repair any tears or holes immediately.


EPDM – The lifespan of an EPDM roof depends on how well it is maintained.

GRP – The lifespan of a GRP roof depends on how well the manufacturer maintains it.


EPDM – Relatively easy to install.

GRP – Just as EPDM, GRP is also quite straightforward to install.

Durability and Lifespan

EPDM – An EPDM roof lasts about 25-30 years.

GRP – A GRP roof also has good durability and lasts about 25-30 years.

Environmental friendliness

EPDM – As stated above, EPDM is a recyclable product.

GRP – Although GRP is manufactured from recycled materials it still requires energy to manufacture. GRP can be recycled to produce new materials.


E PD M – EPDM is cheaper than GRP.

GRP – Due to the fact that GRP is manufactured from non-renewable resources, it costs more than EPDM.


Are GRP flat roofs any good?

Yes! GRP flat roofs are very versatile and offer excellent value for money. They have a long lifespan, they’re eco-friendly, and they come with a warranty. GRP roofs are suitable for both residential and commercial properties.

How do you maintain a GRP roof?

You don’t have to worry about maintaining a GRP roof. In fact, you shouldn’t even think about doing so. All you need to do is make sure that the roof is cleaned regularly and that any repairs are made promptly.

Can you walk on a GRP flat roof?

You sure can! GRP roofs are extremely durable and strong. There are no concerns regarding walking on them. GRP roofs are designed to withstand heavy objects and extreme weather conditions.

What happens if I get water on my GRP roof?

Even though GRP roofs are water-resistant, you’ll need to clean it off immediately. Cleaning off the water will prevent mould growth. You can dry the area with a damp cloth after the water has been removed.

Do GRP roofs leak?

They generally do not leak. However, roof surface cracks can lead to water ingress and leaks.

Will my insurance cover GRP roofs?

Most insurers will cover GRP roofs. Some may even pay for the installation. Make sure your insurer covers GRP roofs before you purchase one.

Is GRP safe?

GRP roofs are completely safe. They’re fireproof, waterproof and highly durable. They’re also eco-friendly and cost-effective.

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