When deciding between an overlay and a tear-off for concrete tile roofing, it’s important to understand what each involves. An overlay means placing a new layer of roofing tiles directly over the existing ones without removing the old tiles. This can be faster and less costly, as it reduces labor and disposal fees. However, overlays are best suited only when the current roof structure is in good condition and able to support the extra weight of a second layer. Concrete tiles are quite heavy, so if you notice sagging, visible cracking, or water damage within the roof deck or attic, it’s a sign the existing roof may need more thorough repairs or a full tear-off. Simple diagnostics include inspecting your attic for signs of moisture, checking the roof deck’s strength by walking carefully on the tiles, and watching for unevenness in the tile surface which could hint at underlying issues.
A tear-off involves removing all old concrete tiles, underlayment, and any damaged roof decking before installing new tiles. Although more labor-intensive and expensive, it allows a roofer to address hidden damage, replace the underlayment, and ensure a solid, long-lasting roof. Homeowners can safely inspect the roof visually and look for broken tiles, granule loss, or flashing issues, but any gaps or persistent leaks warrant a professional inspection. When calling a roofer, ask “How do you assess whether an overlay is suitable for my roof?” and “What warranty options do you offer with each approach?” Since warranties and local building codes vary, these questions help you understand the roofer’s expertise and what protections you have after installation. Being cautious upfront avoids costly repairs and protects your home investment for many years.