5:12Concrete & clay tile
Tile Roof Replacement and Re-Lay
Most tile roofs that leak don't need new tile. They need new underlayment. On a re-lay, roofers lift the tiles, replace what's under them and set the same tiles back. Full replacement makes sense when many tiles are broken, discontinued or too heavy for the framing.
5:12Why tile fails
The tile outlives what's under it
HomeGuide rates tile at 30–100+ years. The underlayment beneath it does not last that long, and it is the layer that keeps water out of the house. Many tile roofs on 1980s homes in Danville, Blackhawk and Alamo are now at that point: the tiles look fine and the ceiling stains anyway.
Look for: slipped or cracked tiles, stains on ceilings near valleys and walls, granules or debris washing out at the eaves, and daylight through the deck in the attic.
A tile roof, layer by layer. A re-lay replaces layer 3 (and 4 if needed) and reuses layer 5.
6:12Re-lay or replace
Two ways to fix a tired tile roof
| Tile re-lay | Full tile replacement | |
|---|---|---|
| What happens | Tiles lifted and stacked; new underlayment, battens and flashing; same tiles reinstalled | Everything removed; new underlayment and new tile (or a different material) |
| Best when | Most tiles are sound and the profile is still available for replacements | Many cracked tiles, a discontinued profile, or you want a new look |
| Watch for | Breakage during handling: ask how many spare tiles are included | Weight and framing if switching tile types; HOA approval |
| Rules | Half or more of the roof: cool-roof rule; more than half in a very high fire zone: Class A | Same thresholds; product choice matters more |
4:12Concrete vs. clay
Concrete or clay tile?
Concrete tile
The common choice on 1980s and 1990s tract homes. Heavy (typically about 9–12 lb per sq ft), affordable for tile, and the color is in a surface coating that can fade.
Clay tile
Fired clay holds its color, weighs less than concrete in many profiles, and costs more. Barrel and S profiles suit Mediterranean and Spanish homes.
Switching from a lighter roof to tile, or between tile types, should start with a check of the framing. Weights vary by product, so ask for the manufacturer's figure.
3:12Rules & HOAs
Cool-roof, Class A and HOA approvals
- Cool roof. East of the Berkeley Hills ridge, replacing 50% or more of a steep-slope roof triggers the cool-roof rule (County; BayREN). Many tile colors are rated; confirm the product's aged reflectance or SRI.
- Class A. Tile is generally Class A. In very high fire zones (parts of Danville, Orinda, Lafayette, Moraga), the whole covering must be at least Class A when more than 50% is replaced in a year. Details.
- HOA. Blackhawk and other planned communities typically require architectural approval for roof color or material changes. Get approval before you sign a roofing contract.
Cracked-tile repair: a roofer can usually swap individual cracked tiles if matching tiles are available and the underlayment is sound.
3:12FAQ
Questions homeowners ask
Why does my tile roof leak if the tiles look fine?
Tile sheds most water, but the waterproofing is the underlayment beneath it. When that layer dries out and cracks, water that gets past the tiles reaches the deck. That is why many 1980s tile roofs leak with tiles that still look sound.
What is a tile re-lay?
Roofers lift the existing tiles, stack them, replace the underlayment (and battens or flashing as needed), then reinstall the same tiles, replacing broken ones. It keeps the look and saves the cost of new tile when the tiles are in good shape.
Can I switch from tile to shingles or metal?
Yes, and it removes a lot of weight from the framing. Check HOA rules first; in communities like Blackhawk, roof material and color changes typically need architectural approval.
Are concrete tile roofs Class A?
Concrete and clay tile are generally Class A. In a very high fire hazard zone, confirm the listed assembly with the roofer and the building department.
12:12Quote
Get a tile roof re-lay or replacement quote
Tell us about the roof. A local roofing contractor who serves your city can call to schedule an inspection and written bid.
- Composition, tile, flat and metal roofs
- Walnut Creek, Lafayette, Orinda, Danville and nearby
- Prefer to talk? (925) 281-5910