GAP Ltd, trading as All-Purpose Plastics, manufactures and distributes PVC-U building products to customers across the UK. Its network of more than 110 depots provides broad product availability and local service for window and door installers, regional and national housebuilders, and refurbishment contractors. The range includes fascias, soffits, gutters, downpipes, cladding, windows, trims and door panels, as well as GRP doors, aluminium bi-fold doors and sliding doors. GAP also offers roofing products and sheet sales.

The company is the exclusive supplier of Rockdoor composite doors, which it describes as highly secure and thermally efficient. Customers can browse products and order online at trade prices, choosing UK delivery or collection from a local depot. Trade customers can also visit a depot to open a trade membership and access account pricing. GAP supports its product range with brochures, product guides, technical manuals and information on accreditations. Its nationwide depot network, online ordering service and range of building products make GAP a supplier for both local trade businesses and larger construction and refurbishment projects.