Concrete roof tiles are durable and long-lasting but can encounter a few common failure modes over time. One typical issue is cracking or breaking of individual tiles, often caused by impact from falling branches or foot traffic during roof inspections. Tiles can also fail due to improper installation, such as inadequate fastening or incorrect spacing, which allows tiles to shift, leading to leaks or damage from wind uplift. Another frequent problem is efflorescence, a white powdery substance on the tile surface caused by water-soluble salts rising through the concrete. While not structurally damaging, it can affect the tile’s appearance. Additionally, moss and algae growth on concrete tiles can trap moisture and accelerate wear, especially in shaded or damp climates.
To check your concrete tile roof safely at home, start by inspecting the roof from the ground with binoculars to look for broken, displaced, or missing tiles. Inside your attic, look for signs of water stains or daylight coming through, which may indicate leaks. Avoid walking on concrete tiles as they can be brittle and break underfoot. If you spot cracked or loose tiles, it’s best to call a professional roofer experienced with concrete tile systems. When contacting a contractor, ask whether they will inspect the fasteners and underlayment along with tile replacement, and if they offer any warranty on labor and materials. Confirm they will use the correct tiles to match existing ones and follow the manufacturer’s installation guidelines to maintain your roof’s warranty and longevity.