Is GRP roofing flexible?

A fibreglass roof is a flat roof made out of glass-reinforced plastic materials. It is incredibly flexible, durable, and waterproof.

Which is better GRP or EPDM?

GRP roofs are less prone to damage than felt roofs and EPDM roofs too. This means that over the years, the chances of repairs are lessened and in turn more money will be saved. … EPDM is also extremely durable and more flexible than GRP when it comes to a building’s expansion and contraction, meaning cracks are unlikely.

Is GRP roofing any good?

Although pricier on average, GRP roofs come with a number of advantages on a level that few other flat roofing solutions can offer. 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.

Are GRP roofs 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. …

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How long will a GRP roof last?

Extensive testing has demonstrated the typical life expectancy of a GRP roof product to be well in excess of 50 years.

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. … And the movement which occurs during this process of thermal expansion can cause the GRP roof to crack open.

Is GRP roofing expensive?

As mentioned above the initial cost of GRP roofs is more expensive than other roofing systems. But compares favourably when compared over the roofs lifespan. The reason for this is fiberglass roofing benefits from some advantages that most other roofing systems cannot compete with.

Is Fibreglass roof better than felt?

Fibreglass is much more durable than felt and stronger too. It has no seams, so it’s less likely to fail and let water in, and it’s relatively easy for a professional to repair if damaged. … This is also more environmentally friendly, since roof felt is not widely recycled. The downside to fibreglass roofing is its cost.

What are the disadvantages of GRP?


  • They cost more. When you compare it to rubber materials, GRP costs more. …
  • They’re not for large roofs. It’s not always the best option for larger roof areas, and the expansion rates can be high.
  • They’re picky.


Can you walk on GRP roofing?

Yes, a Fibreglass Roof can be walked on. A roof with little to no foot traffic expected would suit 1 layer of 450g matting, a moderate level of foot traffic should use 1 layer of 600g matting and a balcony or a roof with regular foot traffic should use 2 layers of 450g matting. …

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Do Fibreglass roofs leak?

Leaks are caused in a fibreglass roof for a multitude of reasons. Water ingress has developed into a leak, this could be from a crack in the top coat, pinholes, faulty flashing or cracked rendering. You will need a GRP roofing specialist to conduct a roof survey to trace the fault or faults.

Should a GRP roof hold water?

GRP is highly water resistant, so it’s not as prone to leaks as felt flat roofs. However, water can still collect on the flat surface of the roof easily. If left there, it can potentially cause leaks and structural issues over time. This is known as ponding.

Can you recoat a GRP roof?

If your fibreglass roof is starting to show signs of wear and tear and you’re wondering if recoating fibreglass roofs is an option, the simple answer is yes – it is! There is absolutely no reason to replace your grp roof if it’s still in decent condition.

Will Fibreglass set in cold weather?

Our Top Tips for Fibreglass Work in Winter

Do not start fibreglassing if the temperature is below 5°C as it will not cure. … The resin should be left in a warm room the night before using it if the ambient temperature is below 10°C. Care should be taken to ensure that the resin does not freeze.

Which is better Fibreglass or rubber roof?

If you have a tight budget but need a flat roof which is still of high quality, EPDM is the most cost-effective option. GRP fibreglass is often the more premium product, but this needs to be balanced with the fact it can be the stronger and longer-lasting of the two.

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Can you GRP in rain?

It is very important to check weather conditions and temperatures before starting GRP application. It is advisable to avoid working in the rain. A check on the average temperatures forecast is also important to ensure that the correct amount of catalyst is mixed into the resins and topcoats.

Roofs and roofing