Can you put solar panels on a tile roof? Mounting, breakage and the real added cost

Yes. Clay and concrete tile roofs carry solar arrays, but they cost more to mount on than shingle. The tile industry's installation manual requires a deck flashing and a tile flashing at every penetration, and its technical brief prohibits fastening equipment to the tiles themselves, so each attachment means lifting, cutting or swapping tile. Price that work as an adder per watt: a $2,000 tile adder on an 8 kW system is $0.25 per watt above the quote's base.

The adder is only half of the decision. A tile roof is two layers with two different lifespans: the tiles you see, which shed most of the water, and the underlayment beneath them, which protects the deck from what gets past the tiles. Panels bolted through both layers for 25 years turn the condition of that hidden layer into the real question, because lifting tile later to repair underlayment means lifting the array first.

This guide sits in the roof and property section. It explains how installers mount on tile, what the Tile Roofing Industry Alliance's published standards require at each attachment, what breakage really costs, and how to price the whole tile premium against the U.S. Department of Energy benchmark line this site uses in its per-watt cost guide. Every dollar figure for tile work below is an illustration with its inputs printed, because no public dataset reports tile adders on their own; replace the inputs with your installer's line items.

Clay, concrete and the layer you cannot see

Clay tile is fired earth; concrete tile is a cast mix of cement and aggregate. For solar mounting the two behave alike in the ways that matter: both are rigid, both are heavy compared with shingle, both can crack under a misplaced boot, and neither can simply be drilled and sealed the way a shingle roof is. The Tile Roofing Industry Alliance (TRI Alliance), the trade body whose concrete and clay tile installation manual carries an IAPMO Uniform Evaluation Service report (ER-2015), describes an installed tile roof as a highly effective water shedding assembly whose performance depends on every component being installed properly. Its March 2024 Concrete and Clay Roof Tile Installation Manual defines the underlayment as a water shedding membrane installed over the roof sheathing, rafters or trusses.

That two-layer design is why tile and solar need care. Water that drives past the tiles in wind or rain is meant to run down the underlayment and out at the eave. Any hole punched through that membrane for a solar mount must be sealed to the deck and then covered again at the tile surface, or the system leaks slowly into the deck where nobody sees it for years.

Slope matters as well. The manual says tile installed on slopes below 3:12 is considered decorative only and must sit over an approved membrane roof covering, and it requires a double layer of underlayment where the slope falls between 3:12 and under 4:12. On a low-slope tile roof, then, the membrane under the tile is doing the waterproofing, and a solar attachment that breaches it is breaching the only real water barrier on that plane.

Ask your roofer two questions before the solar design is final: what underlayment sits under the tiles, and roughly how old it is. The answer decides whether the next section's mounting cost is the only tile cost, or the smaller of two.

Three ways installers mount on tile

Installers generally quote one of three approaches, sometimes mixing them on one roof. The names vary by region and by racking maker, so ask which method the quote assumes and ask to see the manufacturer's installation instructions for the specific mount. The table describes each method in general terms; it is not a ranking.

Tile mounting methods compared (general descriptions; confirm the specific product and detail with your installer)
Method	What happens at each attachment	Tile handling	Questions to ask
Tile hook	A hooked bracket is fastened to the rafter through the deck, sealed at the underlayment with a deck flashing, and passes between or under tiles to reach the rail.	The tile over each hook is usually notched or ground so it sits flat over the hook; the tile is relaid, not discarded.	Which deck flashing is used at each penetration? Is a tile flashing installed above it, as the TRI Alliance details require?
Replacement flashed tile	The tile at each attachment point is swapped for a flashed replacement piece, often metal or a molded part shaped to the tile profile, with the stanchion passing through its built-in boot.	One field tile removed per attachment; those tiles become spares.	Is the replacement piece made for your tile profile? Who supplies replacements if one is damaged later?
Tile removal under the array (comp-out or shingle-out)	Tiles are removed where the array will sit, the underlayment is renewed or covered with a composition roof section, and standard flashed mounts go into that surface. Tile is relaid around the array edges.	Many tiles lifted and stored; some reused at the edges, the rest kept as spares.	Is the new surface under the array tied into the tile at every edge with proper flashing? What happens to the removed tiles?

The tile hook keeps the roof surface largely intact. The flashed replacement tile trades one tile per attachment for a purpose-made boot. Removing tile under the array is the most invasive option on the day of installation but it gives the attachments a conventional surface and renews the waterproofing exactly where the panels will hide it for decades. Which one is right depends on the tile profile, the age of the underlayment, local practice and what the building department accepts. Treat any installer who says only one method exists with caution, and treat any installer who says tile needs no special handling with more.

What the tile standards say about solar attachments

Tile is one of the few roof types where the roofing trade has published direct guidance aimed at solar contractors, and it is short enough to read before signing. Three points from the TRI Alliance documents carry straight into a quote review.

First, the TRI Alliance 2016 technical brief on flashing at tile penetrations says the attachment of any accessory directly to an individual tile or tiles is prohibited. Mounts must reach the structure underneath. A design that clamps rails to the tiles themselves fails this test.

Second, the same brief defines a penetration broadly: an object fastened to or through the roof sheathing that protrudes through or alters the underlayment or the roof tile is a penetration and requires flashings. It says all such penetrations require an approved deck or underlayment flashing and a tile flashing, consistent with the installation manual's detail MC-02, which shows the required two-step deck and tile flashing and notes that all penetrations require a deck and tile flashing. The brief also acknowledges that there has been confusion in the solar community about what tile flashing is required, so it is worth confirming that both steps are in your installer's plan.

Third, the 2024 installation manual's section on solar systems says the roof must be constructed to support the loads of the roof-installed solar system, that roof-mounted or integrated systems serving as roof coverings must conform to Chapter 9 of the International Residential Code, Chapter 15 of the International Building Code or other applicable codes, and that solar systems on tile roofs should be installed according to the manual, the solar manufacturer's installation guidelines and the applicable building code. The older 2008 brief on solar systems adds that appropriate flashing must keep water flowing on the surface of the tile or redirect it onto the tile surface or off the roof. Whether the framing meets the load requirement is a separate check, and the guide to whether a roof can support solar panels works through the weight and snow tests building departments apply.

Ask for the flashing detail by name. The installer should be able to say which deck flashing and which tile flashing go at each mount, and show the product sheet.
Ask whether any part of the system attaches to tile. The answer should be no.
Ask for the structural letter or permit drawing. Tile is heavy before panels arrive; the permit set is where the load check lives.
Ask for photos of the underlayment flashing before tiles go back. Once tile is relaid, no inspection from the ground can confirm the first step happened.

Breakage, spare tiles and the matching problem

Some tiles break during a solar installation. Crews have to walk the roof, lift tiles, cut notches and set tiles back over brackets, and rigid tile does not forgive a misplaced foot. The TRI Alliance's 2014 brief on walkability says most manufacturers specifically do not warrant breakage due to foot traffic, and that broken tiles should be replaced as soon as possible to avoid damage to the underlayment from water intrusion or exposure to the sun's ultraviolet rays. The same brief recommends placing solar panels and other roof-mounted equipment so as to minimize roof traffic for long-term servicing.

The practical consequence is that breakage belongs in the contract, not in a conversation after the crew leaves. A fair quote on tile says how many tiles the installer expects to replace, who supplies replacements, whether the installer will source matching tile, and what happens to tiles removed for the array. Removed tiles that are stored and returned as spares are worth asking for, because they match your roof.

Matching is harder than it sounds on an older roof. Tile profiles and colors get discontinued: the TRI Alliance published a 2026 bulletin listing roofing tiles discontinued in North America, written to help roofers and homeowners identify them and decide between repair and replacement. If your roof was installed decades ago, ask the installer or a roofer to identify the tile before work starts, and get a plan for what replaces a broken piece if the profile is no longer made. The manual's repair procedure, for reference, is to cut any fasteners, remove the broken pieces, remove the fasteners and repair the underlayment before setting a new tile.

Before work starts, photograph every roof plane the crew will touch, including close-ups of any already cracked tiles.
Ask for the tile type, profile and color to be named in the contract or work order.
Agree in writing on spare tiles: how many, who supplies them, and where they are left.
After installation, walk the property with binoculars or ask for the installer's post-job photos of every plane, and report cracked tiles in writing while the workmanship warranty is fresh.

The underlayment clock decides the sequence

The Department of Energy's roof and solar article says a roof will last anywhere from 20 to 50 years depending on the materials used, and that solar panels last about 25 to 30 years. Tile sits at the long end of that roof range in the sense that the tiles themselves often survive for decades. The trap is assuming the whole roof shares the tiles' life. The underlayment is a separate product with its own age and condition, and on an older tile roof it is the part a roofer will look at first.

If the underlayment needs replacing within the life of the array, the cheapest moment to do it is before the array goes on. Re-underlayment on a tile roof means lifting the tiles, renewing the membrane and relaying the tiles; doing that later means paying the solar installer to remove and reinstall the array as well. The Department of Energy makes the general point for every roof type, that replacing a roof and adding solar at the same time avoids having the panels reinstalled later. The roof replacement sequencing guide works through that decision with prices on each path; on tile, swap the words roof replacement for underlayment replacement and the arithmetic holds.

A related option, removing tile only under the array, can be a partial version of the same move. If the underlayment under the array area is renewed as part of the mounting work, the hidden section of roof gets new waterproofing exactly where it will be hardest to reach later. Ask for that to be priced separately so you can see what it adds.

Sequencing decision for a tile roof (a planning framework, not an inspection)
What the roofer reports	Sensible sequence	What to get in writing
Underlayment in good condition with long remaining life	Mount on the existing roof with full two-step flashing	Flashing method, spare tiles, breakage terms
Underlayment aging, likely to need work within the array's life	Renew underlayment first (or under the array area as part of mounting), then install	Separate price for re-underlayment; roofer and solar warranties that do not cancel each other
Underlayment failing now, or leaks already present	Roof work first; solar after the roof is signed off	Roofer's written condition report; solar price held or re-quoted after roof work
Low-slope tile (under 3:12) over a membrane	Treat the membrane as the roof; its age decides the timing	Who warrants the membrane after penetrations
Tile profile discontinued and few spares available	Plan breakage replacement before work; consider removing tile under the array and keeping it as spares	Named replacement plan and the number of spares kept on site

Pricing the tile adder against the benchmark

A tile premium is easiest to judge in the units this site uses everywhere else: dollars per watt DC. The U.S. Department of Energy's Q1 2025 residential benchmark, $2.95 per watt DC (modeled market price for an 8 kW system, 2024 dollars, checked October 30, 2026), is a national modeled comparison line, not a local price or a cap. A quote on tile will normally sit above a comparable shingle quote, and the question is whether the gap is explained by line items you can see.

The table runs one set of illustrative numbers. It takes an 8 kW system at the $23,600 benchmark price and adds tile adders from $1,000 to $5,000, then shows what each does to price per watt, to simple payback at an illustrative $2,400 a year of value (12,000 kWh at 20 cents), and to the value per kilowatt-hour the system would need to earn for a 12-year simple payback. No federal credit is included, because the residential credit is not available for systems placed in service after December 31, 2025.

Illustration only. Inputs: 8 kW DC; base price $23,600 ($2.95 per watt); production 1,500 kWh per kW a year (12,000 kWh); value 20 cents per kWh ($2,400 a year); no incentives, flat prices, no degradation.
Tile adder	Adder per watt	Total price	Price per watt	Simple payback	Value per kWh needed for 12-year payback
$0 (shingle-like baseline)	$0.000	$23,600	$2.950	9.8 years	16.4 cents
$1,000	$0.125	$24,600	$3.075	10.3 years	17.1 cents
$2,000	$0.250	$25,600	$3.200	10.7 years	17.8 cents
$3,000	$0.375	$26,600	$3.325	11.1 years	18.5 cents
$4,000	$0.500	$27,600	$3.450	11.5 years	19.2 cents
$5,000	$0.625	$28,600	$3.575	11.9 years	19.9 cents

Two patterns stand out. Each $1,000 of tile work adds $0.125 per watt on an 8 kW system and about five months to simple payback on these inputs. And the adder raises the break-even value per kilowatt-hour by roughly 0.7 cents per $1,000, which matters most where retail and export values sit close to the line; the 2026 break-even guide shows where your roof and rate fall. A tile adder that keeps the quote inside the range a tile roof justifies is a cost of the roof, not a red flag. An unexplained jump far above it is the same question the quote red flags guide asks of any price: what exactly is it paying for?

Reading a tile-roof quote line by line

Ask every installer to show the tile work as its own lines rather than folding it into the system price. Separated lines make three quotes comparable even when they use different mounting methods, and they make it obvious when one installer has left out a step another has included. Typical lines to look for, or to ask for if they are missing:

Number of attachment points and the mount type at each.
Deck or underlayment flashing product and tile flashing method at each attachment.
Tile removal, notching or replacement, priced per attachment or as a lump sum with the count stated.
Breakage allowance: the number of tiles the installer expects to replace and the price per replacement tile.
Any underlayment renewal under the array area, priced separately.
Disposal or storage of removed tiles, and how many are left as spares.
Workmanship warranty terms that name roof leaks at penetrations, and how long they run.
Detach-and-reinstall price for a future roof or underlayment job, or the method that will set it.

Line up the separated quotes in the quote comparison tool on price per watt, then compare the tile lines side by side. If one quote is far cheaper and omits the tile flashing step or the breakage allowance, the difference is not a discount; it is an unpriced risk that lands on you later.

When tile tips the decision elsewhere

Sometimes the tile premium, the underlayment age and the roof's layout add up to a project that makes more sense off the roof. A property with open, unshaded ground can sidestep tile handling entirely with a ground array; the ground mount versus roof mount guide compares the two mounts in the same per-watt units, including the trenching and foundation lines a ground quote adds.

In planned communities, tile roofs often come with an architectural review process, and visible changes to the roofline, such as a section of tile replaced under the array, may need approval. Many states have solar access laws that limit how far an association can restrict solar, but the review still happens; the HOA solar rules guide explains how to price a condition the board imposes. And if the roof is the right place but the price is not, getting two more tile-experienced quotes usually does more than negotiating one.

Itemizing a tile adder on an 8 kW quote

Illustrative inputs, every one replaceable with your installer's numbers: an 8 kW DC system priced at the $23,600 benchmark line before tile work; 24 attachment points using tile hooks; at each attachment, a deck flashing kit at $45 and three quarters of an hour of extra labor at $90 an hour for lifting, notching and relaying tile, so $112.50 per attachment; and a breakage allowance of 12 replacement tiles at $15 each.

Tile work: 24 times $112.50 is $2,700, plus 12 times $15 is $180, for a tile adder of $2,880. Per watt: $2,880 divided by 8,000 watts is $0.36. Total price: $26,480, or $3.31 per watt. At an illustrative $2,400 a year of value (12,000 kWh at 20 cents), simple payback moves from 9.8 years to 11.0 years. For a 12-year simple payback the system would now need to earn about 18.4 cents per kWh instead of 16.4 cents. If the roofer then reports that the underlayment needs renewing within a decade, the comparison that matters is no longer this adder; it is the price of renewing it now versus the price of renewing it later plus a detach and reinstall of the array.

One flashing step skipped, discovered years later

The failure that costs the most on tile is invisible on installation day. A mount sealed only at the tile surface, or only at the underlayment, can stay dry for several seasons before water finds the gap and runs into the deck under the array. By the time a ceiling stain appears, the panels have to come off to reach the leak. Ask for photographs of each underlayment flashing before the tile goes back, keep them with the contract, and make sure the workmanship warranty names leaks at penetrations (what the tile and shingle maker warranties cover is narrower than most owners assume).

Tile roof checks before you sign

Tile type, profile and color identified, and a plan for replacements if it is discontinued.
Underlayment type and condition from a roofer, in writing.
Mounting method named, with the manufacturer's installation instructions.
Deck flashing and tile flashing at every penetration, and no attachment to the tiles themselves.
Breakage allowance and spare tiles stated in the contract.
Tile work priced on its own lines, compared per watt across quotes.
Structural review or permit drawings that account for tile weight plus the array.
Workmanship warranty covering penetration leaks, and a detach-and-reinstall price for future roof work.

Tile roof solar questions

Does a tile roof cost more for solar than a shingle roof?

Usually, because each attachment involves handling tile and two layers of flashing, and some tiles break. No public dataset isolates the tile premium, so ask for the tile work as separate line items and convert it to dollars per watt. On an 8 kW system, every $1,000 of tile work adds $0.125 per watt.

Can solar mounts attach directly to roof tiles?

No, according to the Tile Roofing Industry Alliance. Its 2016 technical brief says attaching any accessory directly to an individual tile is prohibited. Solar mounts should be fastened through the deck to the structure, with flashing at the underlayment and at the tile surface.

Will installers break my tiles?

Some breakage is common on tile, and the TRI Alliance notes that most tile manufacturers do not warrant breakage from foot traffic. That is why the contract should state a breakage allowance, who supplies replacement tiles, and how many spares are left. Broken tiles should be replaced promptly so the underlayment is not exposed to water and sunlight.

Is clay tile harder to put solar on than concrete tile?

Both are rigid and both need the same two-step flashing at penetrations, so the mounting principles are the same. Practical differences come from the specific profile, its fragility and whether replacement pieces are still made. Ask the installer which mounts and replacement parts are made for your exact tile, and plan for spares if the profile is hard to match.

Should I replace the underlayment before installing solar on tile?

If a roofer expects the underlayment to need work within the 25 to 30 year life the Department of Energy gives for panels, doing it before installation is usually cheaper than doing it later, because a later job adds removal and reinstallation of the array. Get the roofer's assessment in writing and price both sequences.

What is a comp-out or shingle-out tile installation?

It is an approach where tile is removed in the area the array will cover, the surface underneath is waterproofed with a conventional roofing section, and standard flashed mounts are installed into it, with tile relaid around the edges. It renews waterproofing under the panels but involves more tile handling, so ask how the edges are flashed and what happens to the removed tiles.

If your roofer's report puts the underlayment near the end of its life, read the roof-first sequencing worksheet next and price the renew-now and renew-later paths side by side before you sign the solar contract.

Sources and verification

TRI Alliance, Concrete and Clay Roof Tile Installation Manual (March 2024): Tile roof as a water shedding assembly; underlayment definition; tile under 3:12 decorative only over a membrane; double underlayment for 3:12 to under 4:12; detail MC-02 two-step deck and tile flashing at penetrations; solar section (roof must support solar loads, conformance with IRC Chapter 9 and IBC Chapter 15); tile repair procedure. Checked October 22, 2026.
TRI Alliance technical brief, Recommendations of Flashings at Tile Penetrations (2016): Attaching accessories directly to tiles prohibited; penetration definition; deck or underlayment flashing plus tile flashing required; confusion in the solar community noted. Checked October 22, 2026.
TRI Alliance technical brief #2008-01, Solar Systems: Roof must support solar loads; flashing must keep water on the tile surface or direct it off the roof. Checked October 22, 2026.
TRI Alliance technical brief #2014-02, Walkability on Concrete and Clay Roof Tiles: Most manufacturers do not warrant breakage from foot traffic; replace broken tiles promptly to protect underlayment; place solar equipment to minimize roof traffic. Checked October 22, 2026.
TRI Alliance, Discontinued Roofing Tiles in North America bulletin (2026): Existence and purpose of the 2026 discontinued-tile bulletin, listed on the technical briefs page; tile names were not extracted and are not printed here. Checked October 22, 2026.
U.S. Department of Energy, Replacing Your Roof? It's a Great Time to Add Solar (July 28, 2021): Roofs last 20 to 50 years depending on materials; panels about 25 to 30 years; doing both together avoids reinstalling panels later. Checked October 22, 2026.
IRS, Residential Clean Energy Credit: Not available for property placed in service after December 31, 2025 (page last reviewed July 4, 2026). Checked October 22, 2026.
U.S. Department of Energy, Solar Photovoltaic System Cost Benchmarks (Q1 2025): Table 2, 2025Q1 PV-only cost benchmarks: residential 8 kW DC system, modeled market price $2.95 per watt DC, 2024 dollars; used as this site's comparison line for the $23,600 base in the tables; not a local price. Checked October 30, 2026.

This page explains tile mounting practice and prices a tile premium on illustrative inputs; it is not a roof inspection, an engineering review or a code determination. Tile profiles, local codes and racking products vary, and only a roofer or engineer who has been on your roof can judge its underlayment and structure. No installer, racking product or tile brand is recommended here.