Concrete tile and chimney flashing leaks most often stem from the flashing – the metal or waterproof material that seals the junction between the chimney and the roof. Over time, flashing can crack, rust, or pull away due to weather exposure or improper installation, allowing water to seep beneath your tiles and into the roof structure. Concrete tiles themselves are durable but can also crack or break from impacts, freeze-thaw cycles, or shifting roof framing. When water sneaks through damaged tiles or compromised flashing, it can cause stains inside your home, mold growth, and rot in the roof deck. A simple diagnostic step is to inspect the chimney flashing closely for gaps, rust, or curled edges, and to check the condition of surrounding tiles for cracks or displacement. From the safety perspective, examining flashing up close can be risky because of roof slopes and heights, so walking the roof should be done with care or avoided if you feel unsure.
If you spot damaged flashing or broken tiles, minor repairs might involve resealing small gaps with roofing sealant or replacing a handful of tiles, but persistent leaks or widespread wear are a job for a professional roofer. Always ask the contractor if they use manufacturers’ approved flashing materials and if their repairs will maintain your tile’s warranty. Two key questions to ask are: “How do you ensure flashing repairs won’t void my tile warranty?” and “Can you provide a written assessment of whether tile replacement or flashing repair is the better long-term solution?” This way, you can be confident the fix will last and safeguard your home properly.