Clay tile roofs are a beautiful and durable choice, but integrating skylights into these roofs can sometimes lead to leaks. These leaks often happen because clay tiles are rigid and don’t easily conform to the angled edges of skylights, creating gaps where water can find its way inside. The most common causes include improperly installed flashing, cracked or missing tiles around the skylight, or sealants that have deteriorated over time. Diagnosing leaks usually starts during or after rain—check for water stains or drips inside the room beneath the skylight. From outside, look for cracked or broken tiles, gaps around the flashing, and sealant that’s peeling or cracked. A safe DIY check is to gently lift tiles around the skylight (being careful not to damage them) to inspect the flashing and look for gaps or rust. Avoid removing too many tiles, and never walk directly on the tiles—it’s better to wear soft-soled shoes and use knee boards if necessary.
If you find any signs of leakage, or if your inspection raises concerns about flashing or tile condition, it’s wise to call a professional roofer experienced with clay tiles and skylights. A roofer can properly reseal flashing, replace damaged tiles, and ensure the skylight's fit is weatherproof. When consulting a contractor, clarify if they will inspect both the flashing and the surrounding tile underlayment and ask, “How do you ensure the flashing integrates properly with the clay tiles to prevent future leaks?” Also inquire, “Will the repair maintain my roof’s warranty and the skylight manufacturer’s warranty?” These questions help confirm they understand the delicate balance between tile roofing and skylight installations and that your investment stays protected.