Hello and welcome to the Derek Lyall GRP Roofing Ltd Website.

Derek has over 35 years experience in the roofing and building business and is pleased to offer customers new and old Topseals GRP flat Roofing waterproof System with a 25 year Manufacturers Guarantee

GRP or (and here's the science bit) Glass Reinforced Plastic is a wet laid, GRP laminate made from cold applied, preaccelerated, unsaturated polyester resin solution in styrene reinforced with emulsion bound chopped strand mat. Finished with a pigmented polyster topcoat and cured with peroxide catalyst to give a monolithic, fully bonded GRP layer of either 450gm or 600gm glass content.

In other words Topseal is a layer of GRP laid to a prepared deck to form a waterproof layer that will last and last and last !

Here are some of the many roofs that we have replaced with the GRP Roofing System.

These roofs not only keep out the rain and snow but looks good too and with the 25 year guarantee is hard to beat.