Profile: Holborn Asphalte Co Ltd. specializes in single ply roofing, built up felt roofing, reinforced bituminous membrane roofing, hot-melt structural waterproofing systems and lead works. Felt roofing is used to waterproof flat and low-pitched roofs. Our single fly roofing provides long term waterproofing to roofs, roof gardens and podium decks. Our mastic asphalt is used to waterproof roofs, terraces, balconies, walkways, roof gardens, water features, podiums, steps, car & lorry parks and bridge decks.