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GRP as a roofing material is very robust extremely hard wearing and has a 50-year lifespan. With the emergence of GRP roofing as a material that has a 30-year plus history. In order to look at the present product, lets look at the material history. Glass reinforced polyester or GRP was first used in the 1940s, the product has in the last 30-years become a standard material for the construction of water tanks, cladding sheets and high-performance flat roofing coatings.
The product is a composite material, it is made from polyester resin and is further reinforced by CSM (chopped strand mat glass fibre). This product is very light but incredibly strong making this an ideal product to meet the demands of all roof designs. The resin comes in tins or large drums and when mixed with the right consistency with catalyst this cures very quickly. With the chopped stranded mat, this comes in rolls from 1m wide and can accommodate large areas with rolls from 10m² to 120m².
The different thickness of the rolls is 225g/ 450g/600g, these accommodate everything including overlays, flat roofing, new roofs and even walkways or areas with heavy foot traffic. The application of GRP is straight forward and can be learned on a 1 to 2-day course which can be attended through GRP roof manufactures.
The system is hand laid with rollers and brushes, and the finish is very high standard. The trim edges and details trims are all pre-formed and are manufactured from GRP in the UK and abroad. A typical roof can be covered and sealed within 1 working day and anything from 20-150m² can also be covered on larger projects. The material can be formed to suit any roof shape and when applied is highly flexible so complex details can be coated, and trims are easily cut to suit the shape of the roof. Once the roof has been coated the roof will be seamless and waterproof.
Another great quality is that the roof is virtually maintenance free and can be cleared down by hand. Fibreglass roofing will not rot or smell and is less likely to gather organic moss like other traditional roof system such as RBM (reinforced bitumen membranes). The GRP roof material is completely flame free and nearly all come with BBA Certification showing that the product has passes through the resting process. With a proven track record GRP is here to stay in the roofing sector.
1. Size of roof
2. Design build up
3. Specification 15-40 year
4. Roof or walkway design
5. Ease of access to roof areas
If you would like to learn more about GRP Roofing our blog is full of information.