Tile Lift-and-Relay vs. New Tile Roof: Cost Compared

Why a tile roof leaks while the tiles still look fine

Clay and concrete tiles shed most rain, but they are not watertight. Wind pushes water under the laps, and that water runs down the underlayment to the eave. The underlayment is the real waterproof layer. On many older roofs it is asphalt felt, and years of attic heat dry it out until it cracks, tears at the nail holes or simply crumbles at the eaves and valleys.

From the street the roof looks the same as the day it was built. Inside, you see stains near exterior walls, at valleys or under the lowest course of tile. Swapping a few cracked tiles does nothing when the layer beneath is gone, which is why repeat tile repairs on an old roof often stop working.

What happens during a lift-and-relay

The job is also called a refelt or tile reroof. The steps are the same on clay and concrete.

1. Tiles are lifted by hand, sorted and stacked on the roof or on padded ground staging.
2. Old underlayment, rotten battens and loose nails are stripped to the deck.
3. The deck is inspected and damaged sheets are replaced and photographed.
4. New underlayment goes down, typically two layers or a heavier synthetic or cap sheet, lapped toward the eave.
5. Valleys, walls, chimneys and pipes get new metal flashing instead of reused pieces.
6. Eave closures or bird stops are installed so the open ends of curved tile are blocked.
7. Sound tiles are relaid, broken ones replaced, and hips and ridges are reset and sealed.

Felt, synthetic or cap sheet: what goes under the relaid tile?

The underlayment is the part you are really paying for in a lift-and-relay, so it deserves more attention than the tile. Tile roofs in this climate are normally built to the moderate-climate installation manual from the Tile Roofing Industry Alliance and the Western States Roofing Contractors Association, which treats underlayment and flashing as the waterproofing and the tile as a weather shield on top. Within that standard there are three common builds, and each one trades something.

Two plies of felt

The traditional build costs the least, every inspector knows it, and it lies flat under curved tile. Its weakness is the same one that failed the old roof: asphalt felt slowly dries out under hot tile and turns brittle, first at eaves and valleys.

Synthetic underlayment

Synthetics are lighter, hold better at nail holes and resist tearing while crews walk the deck during the relay. The catch is that products vary widely, and not every one is approved for use under tile or rated for the heat that builds beneath it. Ask for the product name and check that the maker lists it for tile roofs.

Mineral-surfaced cap sheet over a base ply

This heavier two-layer build is the one we lean toward on low-pitch tile slopes and in valleys, where water moves slowly and sits longest. It costs the most in material and adds some weight, but it holds up best in the spots where old roofs fail first. Our tile roofing page covers profiles and new installs if you are weighing a full change.

Side-by-side: reusing tile or buying a new tile roof

Both options replace the underlayment and flashing completely. The difference is the tile on top, and that is the largest single material cost on a tile roof.

What drives tile roof underlayment replacement cost?

There is no dependable public planning figure for tile reroofs in this part of LA County, and shingle calculators do not translate. What moves a tile quote is the following.

• Roof size and pitch, measured in squares of 100 square feet.
• Breakage rate: older clay and weathered concrete crack more often when handled.
• Replacement tile supply: a current profile is easy, a discontinued one may mean salvage tile or borrowing from a hidden slope.
• Underlayment specification: two plies of felt, synthetic, or a mineral-surfaced cap sheet each price differently.
• Flashing scope around chimneys, walls, skylights and valleys.
• Deck repair found after the tile and felt come off, priced per sheet.
• Permit, inspection, staging and disposal.

When is a brand-new tile roof the smarter spend?

Reusing tile only saves money if the tile survives handling and lasts as long as the new underlayment. We recommend pricing new tile when any of these apply:

• Concrete tiles have worn through their surface, absorb water and break under light pressure.
• Clay tiles show widespread hairline cracks or flaking from impact or age.
• Many tiles were broken by foot traffic and the profile is no longer manufactured.
• You want a different color or profile, or a lighter product to reduce load.
• The home is in a mapped fire zone and the assembly must be rebuilt to meet current Class A rules.

For a closer look at the materials themselves, our comparison of clay and concrete roof tile covers weight, durability and appearance.

What we see on tile roofs in San Marino and Arcadia

Tile is common on Spanish Revival and Mediterranean homes in San Marino, where clay S-tile and barrel tile set the character of whole streets, and on concrete-tile homes from the 1970s onward in Arcadia. On both, we find the same pattern: tiles in decent shape over underlayment that has run out of life, especially at eaves, valleys and the walls where heat builds.

We also see damage from people walking the roof for other work, such as painting, satellite dishes or solar. Cracked tiles from foot traffic often line up in a path. When we quote a lift-and-relay, we photograph the tile condition, estimate how many replacements the roof will need, and state how those replacements are priced so there is no guesswork later.

Questions to settle before you approve a lift-and-relay quote

Two tile quotes can look close on the bottom line and describe very different jobs. Work through these with each bidder.

1. How many test tiles were lifted, and on which slopes?
2. How many replacement tiles does the price include, and what does each extra one cost?
3. Which underlayment product goes down, in how many plies, and is it listed for tile?
4. Are the battens new or reused, and are counter-battens included?
5. Is every flashing piece new, including the pans at walls and chimneys?
6. Are eave closures or bird stops written into the scope?
7. Where will lifted tile be staged, and how are the driveway and plants protected?
8. Is the permit its own line, with the underlayment inspected before tile goes back on?

A quote that cannot answer most of these is priced on a guess. Ours answers them line by line in writing, with photos from the test lift attached, so the reuse and new-tile options can be compared item for item.

Deciding with real numbers for your roof

The choice comes down to the condition of your tile and the availability of matches. We lift a few tiles during the inspection, check the underlayment and deck, and write both options into the quote when both make sense. If only a small area is failing, tile roof repair may be enough for now. To get both options priced for your home, call (725) 745-8803 or request a quote.