Grestec Tiles : Tile Supplier to architects, trade and specifiers - We are a supplier of commercial floor and wall tiles to the UK’s architectural and specification market. Call 0345 130 2241 now. Supplier of high-quality floor and wall tiles to the UK’s architectural and design community, offering an extensive range of porcelain, ceramic, glass & natural stone tile products. Grestec's tile col Supplier of high-quality floor and wall tiles to the UK’s architectural and design community, offering an extensive range of porcelain, ceramic, glass & natural stone tile products. Grestec's tile collections ensure a comprehensive portfolio suitable for commercial areas, retail, health & leisure, bars & restaurants, hotels and residential projects.