A GRP flat roof, or fiberglass roof as it’s also known, is one of the most popular flat roofing solutions in the UK. GRP stands for Glass Reinforced Polyester, a composite material formed by strengthening plastic with fine fibres made of glass.
This single ply laminate has been used as a reliable means of covering and waterproofing roofs for over 60 years. As well as commercial and domestic buildings, GRP has been used on a wide array of other applications, from boats and lorries to water tanks and ponds.
Installation
GRP flat roofs begin with a layer of catalysed resin being applied to good quality, completely dry roof decking, ideally OSB3 wood. A layer of fibreglass matting is then laid on top followed by another layer of catalysed resin to complete the system. Once cured, a fire retardant top coat resin is then applied to completely weatherproof the roof and give it a more attractive finish.
Repairs
Repairs are not something you’d associate with a GRP flat roof. As long as the original job was carried out correctly on suitable decking with properly installed trims and flashing, your GRP roofing system need little cause for concern.
Although impact resistant, should your fibreglass roof somehow develop a split or hole, there is nothing to stop another round of GRP being laid on top as long as the roof is still structurally sound.
Fibreglass roofs are unaffected by UV but fading can occur over the years. This will only affect the aesthetical quality of the roof, nothing internally. Should you want, any loss of colour can be combated by applying another layer of top coat to restore your GRP roof to its original glory.
If your GRP roof is leaking, a problem not normally linked to GRP, it may well be as a result of poor workmanship.
Talk to us
So whether you’re looking for a new roof installation, or repairs to an existing one – get in touch and we can discuss it with you.