# Tile Roof Replacement: Lift and Relay or a Whole New Roof?

URL: https://roofwiseusa.com/roof-replacement/tile-roof-replacement
Updated: 2026-09-17
Review: Reviewed by RoofWise USA Editorial Team, editorial review: primary sources checked and independently fact-checked

With tile, the tiles usually outlast the underlayment beneath them, so a tile roof replacement is often a lift and relay of your own tiles, not new tile.

A tile roof replacement is usually not what the phrase sounds like. On a clay or concrete tile roof the tiles routinely outlive everything holding them down, so the job most homeowners actually buy is a lift and relay: the tiles come off, the underlayment and fasteners on the deck are renewed, and the same tiles go back on with the broken ones swapped out. That is a different scope, and a different price, from buying a roof's worth of new tile. Almost none of the pages that rank for this phrase tell you which one they are pricing.

- The tiles are rarely the problem. The National Park Service puts clay tile's life expectancy at "generally about 100 years, and often several hundred," and says it is "unusual that all of the clay tiles on a roof need to be replaced unless matching replacements cannot be obtained."
- What fails is underneath. The NPS is blunt about it: "Often, it is the fastening system used to secure the tiles to the sheathing that fails and needs to be replaced rather than the tiles themselves."
- Tile is heavy. The Department of Energy's Building America Solution Center says tiles are "approximately three times heavier than asphalt roofing, so roof framing and sheathing must be structurally adequate to support the weight."
- Tiles break when people stand on them. IBHS testing found "tiles are very susceptible to accidental damage from foot traffic or poor installation."
- A quote that does not say whether your tiles are being reused, and what a replacement tile costs, is not a quote you can compare to anything.

## Lift and relay, or new tile: which job are you being quoted?

Two different jobs share the name "tile roof replacement," and they are not close in cost.

**Lift and relay.** The tiles are removed and stacked, the deck is inspected, new underlayment and fasteners go down, and the same tiles are reinstalled. Individually broken tiles are replaced as they turn up. The NPS [describes this as ordinary practice](https://www.nps.gov/orgs/1739/upload/preservation-brief-30-clay-tile-roofs.pdf): "it is not uncommon for old tile roofs to be stripped of all their tiles in order to re-lay the tiles with new fastenings and battens," and once the deck work is done "the historic tiles can be re-laid with new corrosion-resistant nails or hooks." Some building departments permit the work under its own name. The City of Rialto, California [states in its re-roof handout](https://www.rialtoca.gov/DocumentCenter/View/8623/Re-Roof-Requirements) that "lift and relay is permitted for existing tile roofs to replace the underlayment," that "broken tiles will have to be replaced," and lists it on the permit counter as a "tile reset."

**New tile.** The whole covering is bought again. That is the right answer when the existing tiles are widely broken, spalled or delaminated, or when the profile has been discontinued and no matching tile can be sourced, which the NPS names as the usual reason a full tile replacement becomes necessary.

The distinction is worth a direct question to every roofer who bids: are my tiles being reused, how many are you assuming will break, and what do you charge for each replacement tile? Get that per-tile price in writing before the work starts rather than after, for the same reason you get a per-sheet price for replacing rotted decking. The broken count cannot be known until the roof is stripped, which makes it the line item most likely to move.

The order of operations is the same as any [roof replacement](https://roofwiseusa.com/roof-replacement/roof-replacement): covering off, deck inspected and repaired, underlayment down, flashing renewed, covering back on. Tile just adds a step nobody thinks about, which is handling a roof's worth of heavy, brittle material twice without breaking it.

## Why the underlayment gives out first

Tile is a shedding surface, not a seal. Some profiles are not watertight on their own at all: the NPS notes that Spanish, Barrel, Mission and other interlocking shapes "are not themselves completely water-repellent when used on very low-pitched roofs," and "have always required some form of sub-roofing, or an additional waterproof underlayer." The layer doing the waterproofing is the one you cannot see from the yard.

<Figure slug="fig-tile-underlayment-exposed" caption="This is a lift and relay opened up: the tiles set aside, and the battens and felt that were doing the waterproofing now in plain view. What the job renews is everything in the photograph except the tiles, which go back down afterwards." />

That layer is ordinary roofing material with an ordinary lifespan. GSA's [technical procedure for clay tile](https://www.gsa.gov/real-estate/technical-procedures/clay-roof-tile-repair-and-reattachment) specifies "asphalt-saturated organic felt conforming to ASTM D 226, Type II, non-perforated. Nominal weight 30 pounds per 100 square feet (1.5 kg/sq m); two layers required." Felt, nails and flashing age at their own pace regardless of how good the tile above them still looks. The NPS lists the same failure points: rotted pegs, rusted nails, and "the deterioration of metal flashing, valleys, and gutters."

Wind makes it worse before the tiles ever move. IBHS [full-scale testing of tile roof systems](https://ibhs.org/wind/full-scale-wind-tunnel-testing-of-roof-tile-systems/) found that "water intrusion on tile roofs can occur at wind speeds as low as 50 mph," and recommends sealing the roof deck for all roof cover types. A tile roof can look untouched from the street and still be wetting its deck in a storm.

The cheapest useful check is from inside. The NPS suggests "periodic inspection of the underside of the roof from the attic after a heavy rain or ice storm for water stains," which "may reveal leaks in their early stages." Stains on the sheathing with intact tile above them are the classic sign that the underlayment, not the covering, is what has run out.

## What this does to the price

We do not publish a national average price per square for tile, because no authoritative body publishes one and the average would be meaningless here anyway. A lift and relay that reuses your tiles and a full new tile roof are different purchases sharing a search term, and the pages quoting one number for both are averaging across that gap.

What actually moves your number: whether the tiles are reused, how many break, the tile profile and whether it is still manufactured, pitch and access, how much decking has to be replaced, and what your local code requires of the underlayment. Those are assumptions, not facts, until someone is standing on your roof, so it is better to see them written down and adjustable than to see somebody else's average.

Tool: [Roof cost estimator](https://roofwiseusa.com/roof-replacement/tools/roof-cost-estimator). A low, typical and high planning range from your roof's footprint, pitch, material, layers and state, with sample prices clearly labeled.

## Weight, and whether your structure can carry it

Tile weight is the constraint that decides what you are even allowed to install. The Building America Solution Center's [guide to clay and concrete tile roofs](https://basc.pnnl.gov/resource-guides/clay-or-concrete-tile-roofs) states that tiles are "approximately three times heavier than asphalt roofing, so roof framing and sheathing must be structurally adequate to support the weight," and that "if replacing asphalt shingles, consult with an engineer to see if structural reinforcement is necessary." The NPS makes the same point from the preservation side: "clay tiles are heavy and it is important that the roof structure be sound," and in areas with heavy snowfall "the roof structure itself may also need added bracing."

This turns up in permit rules. Rialto's handout says tile roofs "may be changed out for one another; however, the weight of the tile must be identical," and that if the proposed tile is heavier than the existing tile or heavier than 6 lb per square foot, a California-licensed engineer's roof analysis and structural calculations are required. Swapping one material for another is a separate question, and a harder one: Rialto's "development standards do not permit a roof material change," because "[r]oof material in a neighborhood/community must match" and "[r]eplacement of roof must be like for like." Where a material change is entertained at all, the handout's submittal list requires Planning approval and adds that "if changing from Shingles to Tile or heavier material Structural Load calculations will be required."

**That is one city's rule, not a national one**
The 6 lb per square foot threshold above comes from one California building department's handout. Weight limits, engineering triggers and underlayment classes are set locally and vary widely. Your own building department is the only place to confirm what applies to your address, and a roofer telling you no permit or calculation is needed is making a claim you can verify for free.

## Why walking on a tile roof breaks tiles

Tile does not fail gracefully under a boot. Tiles are hung so they can move slightly, and the NPS warns that nails "should not be driven too deeply into the furring strips because too much pressure on the tile can cause it to break during freeze/thaw cycles, or when someone walks on the roof." It also lists foot traffic as a direct cause of damage: tiles "can be damaged by roofers walking carelessly on an unprotected roof while making repairs."

Profile matters. Flat shingle tiles, the NPS says, "can generally be walked on by a careful roofer without likelihood of much damage," while "high profile pantiles are very fragile and easily broken." Crews who do this properly spread their weight rather than trusting their footing, "using sheets of plywood, planks, or burlap bags filled with sand." GSA's procedure is stricter still: limit foot traffic over installed tile, require soft-soled footwear, and "do not walk over roof tiles unnecessarily."

The damage also spreads. The Building America Solution Center notes that "if a tile is broken, debris from the tile can impact other tiles, which can lead to a progressive cascading failure." One cracked tile in a valley can end up as several.

<Figure slug="fig-cracked-tile" caption="A crack this size still sheds most of the water that hits it, so it goes unnoticed from the ground for years while the rest reaches the underlayment. Once a piece works loose it becomes the debris that breaks the tiles below it." />

The practical version: every trip anyone makes across your tile roof has a cost. Satellite installers, solar crews, gutter cleaners, chimney sweeps and inspectors all leave breakage behind if they are careless, and the bill for it arrives years later as a stain on a ceiling.

**Do not go up there yourself**
Assessing a tile roof from on top of it is a job for someone insured to do it, with boards or planks to spread their weight. From the ground you can see slipped, cracked and missing tiles with a zoom lens, and from the attic you can see what the underlayment is doing. Those two views answer most of the question without anyone risking a fall or breaking tiles that were fine.

## Your options, in order

**Repair what's damaged.** Good when: The roof is fairly young and the damage is limited to one area. Watch out: Patched shingles may not match, and a repair on a worn roof buys less time.

On tile, repair usually means swapping individual broken tiles and re-securing ridge and hip pieces, which is genuinely worthwhile when the underlayment still has life in it. IBHS testing flags hip and ridge tiles as "vulnerable despite lower wind forces," with poor attachment during installation as the likely cause, so those courses are a common repair. What repair cannot do is buy time for felt that has already failed; patching tiles above a spent underlayment moves water around rather than stopping it.

**Replace the roof with a roofer you choose.** Good when: The roof is old, leaking in more than one place, or the damage is widespread. Watch out: Get more than one written quote with the same scope, and be wary of large deposits or pressure to sign that day.

For tile, "replace" should be priced two ways so you can see the difference: a lift and relay reusing your tiles, and a full new tile roof. Ask each roofer to bid the same scope, including the assumed breakage rate and the per-tile replacement price, or the quotes will not be comparable no matter how detailed they look.

## Bottom line

On a tile roof, the tiles are usually the healthiest part of the assembly, and the underlayment, fasteners and flashing under them are what has actually worn out. That makes lift and relay the job most people need, and it makes "is my tile being reused, and what happens to the ones that break?" the question that separates a comparable quote from a vague one. Confirm with your building department what weight and underlayment rules apply before anyone changes the tile profile, and keep people off the roof in the meantime.

To weigh tile against the other coverings, see [the material comparison](https://roofwiseusa.com/roof-replacement/new-roof-cost). To find out what shape your underlayment is actually in, [the four kinds of roof inspection](https://roofwiseusa.com/roof-replacement/roof-inspection-cost) explains who to ask and what it buys.

Start the Roof Check: https://roofwiseusa.com/check

## Common questions

### Does a tile roof replacement mean I need new tiles?

Usually not. Clay and concrete tiles commonly outlast the underlayment and fasteners holding them down, so the job is often a lift and relay: the tiles come off, the underlayment is renewed, and the same tiles go back on. The National Park Service notes it is unusual for all the tiles on a roof to need replacing unless matching tiles cannot be obtained.

### What is a lift and relay or tile reset?

It is removing the existing tiles, stacking them, replacing the underlayment and fasteners on the deck, and reinstalling the same tiles with broken ones swapped out. Some building departments permit it under that name; the City of Rialto, California calls it a tile reset and states that lift and relay is permitted for existing tile roofs to replace the underlayment.

### Can I put tile on a roof that has asphalt shingles now?

Only if the structure can carry the load, and that is a question for an engineer and your local building department. The Department of Energy's Building America Solution Center says tiles are roughly three times heavier than asphalt roofing and that you should consult an engineer about whether structural reinforcement is necessary.

### Why do roofers say not to walk on a tile roof?

Because tiles break under foot. IBHS found tiles are very susceptible to accidental damage from foot traffic or poor installation, and the National Park Service notes that high profile tiles are especially fragile. Broken tiles then let water reach the underlayment.

### How long does the underlayment under tile last?

There is no single figure, and it depends on the material used, the climate and the slope. What is documented is the mismatch: clay tile life expectancy runs to about 100 years, while the felt, fasteners and flashing under it are the parts that typically fail first and get replaced.

## Sources

- [National Park Service Preservation Brief 30: The Preservation and Repair of Historic Clay Tile Roofs](https://www.nps.gov/orgs/1739/upload/preservation-brief-30-clay-tile-roofs.pdf)
- [GSA: Clay roof tile repair and reattachment](https://www.gsa.gov/real-estate/technical-procedures/clay-roof-tile-repair-and-reattachment)
- [DOE Building America Solution Center (PNNL): Clay or Concrete Tile Roofs](https://basc.pnnl.gov/resource-guides/clay-or-concrete-tile-roofs)
- [IBHS: Full-Scale Wind Tunnel Testing of North American and Australian Tile Roofing Systems](https://ibhs.org/wind/full-scale-wind-tunnel-testing-of-roof-tile-systems/)
- [City of Rialto, California Building and Safety: Re-Roof Requirements](https://www.rialtoca.gov/DocumentCenter/View/8623/Re-Roof-Requirements)