Torch-down roofing uses a layer of modified bitumen that is melted and adhered to the roof surface with a torch. One common weak spot is the pipe boot, the rubber or silicone sleeve sealing around plumbing vents or pipes. These pipe boots can crack, dry out, or become misaligned due to weather exposure, heat, or roof movement, causing leaks. A simple way to check for damage is to visually inspect the boot for cracks, tears, or gaps along the base where it meets the roofing membrane. You might also gently press around the boot to see if it's loose or if water can easily seep in under the edges. Because torch-down roofs can be sensitive to heat and damage, avoid using sharp tools or chemicals near the pipe boots during your inspection.
If you suspect a leak around a pipe boot, a temporary fix is applying roofing sealant designed for torch-down membranes to seal cracks or gaps, but it’s best to confirm this will not void any existing warranty. For more permanent repairs or if the boot is deteriorated or misaligned, calling a professional roofer skilled with torch-down systems is recommended. When consulting a contractor, ask whether they will replace the pipe boot or simply patch the area and if their repair method complies with the manufacturer’s warranty. Also, inquire about how they ensure the torch-down membrane won’t be damaged during the repair, since improper handling can lead to more leaks or roof damage.