Torch-down roofing is a type of modified bitumen roofing that is applied using heat, making it durable and waterproof, but it can develop leaks around skylights due to several common issues. Skylight leaks on torch-down roofs often occur because the roofing material wasn’t properly sealed around the skylight’s flashing or because the flashing itself has deteriorated or moved. The heat used during installation can sometimes cause small bubbles or weak spots in the roofing membrane near skylights, while weather exposure and roof movement over time may cause seals to crack or separate. Simple diagnostics for a homeowner include checking the skylight frame for visible cracks, inspecting the interior for water stains, and during or after a rain shower, watching carefully for any drips or water tracking. It’s important to proceed carefully when inspecting to avoid damaging the roof membrane or flashing.
Safe DIY checks involve gently cleaning the skylight and its surrounding roof area and looking for obvious gaps in the sealant or torn membrane. Avoid walking directly on torch-down roofs since that can cause damage. If you suspect a leak but can’t find the source easily, or if the flashing looks damaged, it’s smart to call a professional roofer experienced with torch-down systems. When you contact a contractor, useful questions include: “How do you ensure the skylight flashing maintains a watertight seal over torch-down roofing?” and “Can you inspect and repair the area without voiding my roof’s warranty?” A knowledgeable roofer will manage the heat-sensitive installation details and ensure any materials match existing layers for a secure, lasting fix.