Glass reinforced Plastic (GRP) – also commonly termed ‘Fibreglass’ or ‘Glassfibre’ – has been used as a construction material for boats since the 1960’s and is widely used wherever structural strength and waterproof qualities are required such as in the marine, transport and aquaculture industries.
GRP is an obvious choice as a roofing material as it is completely waterproof and does not rust, corrode or rot. When properly applied, a GRP roof will last 20 years and more, and can be easily repaired or added to if the need arises.
A GRP roof consists of a good quality substrate such as OSB3 board, onto which a number of layers of Chopped Strand Mat (CSM) are applied, thoroughly impregnated with a liquid polyester resin that has been activated with a hardener. A polyester Topcoat is then applied to add additional weatherproofing and the result is a uniform, seamless, fully waterproof and an easily maintained membrane.
Marine grade (Lloyds approved) resins are commonly used for roofs where certification is not required. The Topcoat should be a Roofing grade such as CrysticROOF standard topcoat which is available in Dark grey and light grey.
Where certification is required the CrysticROOF Premier system is recommended, which will give a job-specific 20 or 25 year guarantee from the manufacturer Scott Bader. This system can only be applied by a Premier Registered Contractor, who has undergone a Registration/Training course. We run this course at our premises in Midleton, see the CrysticROOF Premier brochure for more information.