Stronghold was established in 1998 and began as The Glass Fibre Roofing Company, a specialist roofing contractor that installed GRP (glass reinforced plastic) flat roofing systems. They are now a leading supplier to the UK fibreglass flat roofing industry, supplying GRP products to wholesale, trade professionals, self-builders and DIY customers. We stock a range of these products including premium resin, topcoat, brushes, rollers, squeegees and more.