TPO (thermoplastic polyolefin) roofing is a popular choice for flat or low-slope roofs, known for its energy efficiency and durability. However, leaks around skylights installed on TPO roofs can happen for a few common reasons. These leaks typically occur because of poor flashing installation, sealant failure, or membrane damage. If the flashing around the skylight isn’t properly sealed or if the adhesive loosens over time, water can find its way in. Moreover, temperature changes can cause the TPO membrane to expand and contract, potentially leading to small cracks or gaps that allow water to seep through. To diagnose a leak, homeowners can look for water stains or damp spots around the skylight frame inside the house, and carefully inspect the roof surface for gaps or blisters in the membrane. It’s wise to check the sealant and flashing for breaks and to clear any debris that might be causing water to sit around the skylight area.
For a safe DIY check, use a gentle water spray to simulate rain and watch for leaks inside, but avoid walking on the roof if you’re unsure of its condition. If you notice persistent leaks or damage, it’s time to call a professional roofer experienced with TPO installations and skylight repairs. When reaching out to a contractor, ask if they specialize in TPO roofing and if their repair work maintains the manufacturer’s warranty on your roof. Another important question is how they handle flashing and sealing around skylights to prevent future issues. Proper, warranty-friendly repairs will ensure that your investment lasts and your home stays dry without surprises.