techy Universe on Instagram: "A worker is heating a waterproofing sheet with a gas torch and carefully bonding it onto the roof surface. The heat melts the underside of the bitumen membrane, allowing it to stick firmly and form a seamless, watertight layer. This method is commonly used on flat roofs, terraces, and building edges to prevent water leakage and moisture damage. Torch-on waterproofing provides strong adhesion, long life, and excellent resistance against rain, heat, and weather change