Re-covering a clay tile roof means installing a new layer of tiles over the existing ones instead of completely removing the old roof first. This practice is allowed under some local building codes but often comes with specific limitations. The basic rule usually permits only one overlay layer to prevent added weight that could stress the roof structure. Clay tiles can be heavy, so if your roof already has one tile layer, adding another might exceed code limits or the building’s weight capacity. Before starting a re-cover project, it’s important to check your local building codes and, if your home is under a roofing material warranty, confirm that re-covering won’t void that warranty. Simple diagnostics include a thorough inspection to see if the old tiles are in good shape and well-secured, without any cracks or loose spots. You can carefully walk on the roof wearing soft-soled shoes to check for stability, but avoid walking if tiles look brittle or damaged.
Safe DIY checks include looking closely at gutters and downspouts for tile fragments or dust, signs the old tiles are deteriorating. Also, peek inside the attic to check for signs of water leaks or deteriorated underlayment. If you notice sagging or structural issues, it’s best not to attempt a re-cover yourself and call a professional roofer. When you contact a contractor, ask: “Does local code allow a re-cover with clay tiles on this structure, and can it support the additional weight?” Also, “How will adding a second tile layer affect my current roofing warranty?” These questions ensure you’re aligned on legality and long-term performance, preventing surprises later on.