What is GRP/Fibreglass Roofing?

What is GRP/Fibreglass Roofing?

GRP Roofing or as it’s full term ‘Glass Reinforced Plastic’ commonly also known as Fibreglass is constructed from a polyester resin, which is then strengthened by chopped strand mat glass fibres to form a laminate. In roofing, this provides a strong yet lightweight alternative to lead roofing, providing a strong, durable and weatherproof material perfect for flat roofs.  

When was GRP/Fibreglass Invented?

The material was first invented in 1938 by Russel Games, affectionately known as the ‘Father of Fibreglass’  In the early days, fibreglass - which was also known as ‘Glass Wool’ had a massive array of uses, it was used in the construction of boats - as well as used as a form of building insulation.

Technological advances since the 1930’s has seen GRP one of the most commonly used materials in the worldwide construction industry.

GRP/Fibreglass Attributes

So what makes GRP an excellent choice for roofing?

  • Low Mass - It is very lightweight.
  • Flexibility - It can be cut and made into any shape.
  • Strong & Stable - Some GRP Roofing is strong enough to walk on.
  • It Lasts - 30 Years In service Upwards
  • Tidy - There are no joints or seams
  • UV Resistant - 100%
  • Waterproof - 100%

How does GRP/Fibreglass Roofing Work?

We sell Fibreglass Roofing/GRP roofing in kits mainly. These kits contain everything an individual needs to create their Fibreglass Roof, the kits contain:

Resin, Topcoat, Fibreglass Matting, Hardener, Mixing Chart & Tape. Edges and trims are available separately. These products are then simply applied to a roof deck, providing a fit for purpose, cost effective roofing solution which looks fantastic.

You can see how easy applying a Fibreglass Roof is here:


This range of video tutorials have been created to allow any DIY Savvy individual install and benefit from their fibreglass roof.

GRP/Fibreglass Roofing Vs Lead Roofing

Fibreglass has quickly become the number one choice for customers looking to replace lead roofing. The replacement cost of a lead roof far outweighs the costs of a fibreglass roof whilst the high value of scrap lead can also see lead roofs targeted by criminals.

Fibreglass Roofing from Apex

At Apex, we started out supplying, repairing and fitting fibreglass for boats. Identifying the products use in the roofing sector, we began to supply high quality fibreglass roofing, we are a family run business based in Devon and have built up a strong customer base for our fibreglass roofing kits and resins, having 25 years of experience in the industry.

You can read more about our story, here:


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