Clay tile roofs are cherished for their durability and classic look, but seam failures can compromise their performance. Seam failure occurs when the junctions between tiles, or between tiles and flashing, become cracked, displaced, or improperly sealed. This often happens due to natural settling of the roof, temperature changes causing expansion and contraction, or the clay tiles shifting from wind or impact. Moisture and debris can then infiltrate these weak points, leading to leaks and structural damage over time. To diagnose seam failure, homeowners can safely climb into the attic on a dry day and check for water stains, mold, or rot. Outside, you can visually inspect the roof using binoculars or from a safe ladder spot, looking for gaps or broken tiles around the edges and near penetrations like vents and chimneys.
If you notice gaps or cracked mortar around tile seams, simple temporary fixes include cleaning out debris and applying a compatible sealant designed for clay tiles to slow moisture entry. However, since improper repairs may void manufacturer warranties or cause more harm than good, it’s crucial to call a professional roofer for a thorough evaluation. When speaking to your contractor, ask: “What is your process for assessing underlying damage beneath the tiles?” and “Will your repair work maintain my roof’s warranty and use manufacturer-approved materials?” A skilled roofer will carefully lift and reset tiles, replace damaged flashing, and ensure proper sealing with materials suited for clay roofing. This approach preserves the roof’s integrity and aesthetic while preventing costly water damage down the line.