Torch-down roofing is a type of modified bitumen membrane that is installed using an open flame torch to adhere it to the roof surface, creating a tough, waterproof layer. The process involves cleaning and prepping the roof deck, laying down a base sheet, then heating the back of the torch-down membrane with a propane torch while carefully unrolling it onto the roof. The heat melts the bitumen, causing the membrane to stick firmly and form a seamless seal. This method prevents leaks and is often used on low-slope or flat roofs. However, improper heating can cause damage like blistering or burns, so it’s important to follow the manufacturer’s temperature guidelines closely.
Before starting, homeowners can safely check the roof for cleanliness, dryness, and any structural damage that could affect installation. A simple test is to inspect the surface for dust, debris, and moisture, as these can prevent proper adhesion. Once installation begins, it’s wise to keep the torch flame moving steadily to avoid overheating sections of the membrane. If you are uncertain about techniques or local fire codes, it’s best to call a licensed roofing professional who has experience with torch-down systems. When consulting a contractor, ask how they manage torch safety, and inquire if they follow the exact manufacturer temperature and overlap specifications to maintain your roofing warranty. This ensures a durable roof that protects your home for years.