Cracked roof tiles have four common causes
Cracked roof tiles come from four things here: impact, foot traffic, wind lifting and dropping them, and the slow failure of the fasteners or battens holding them. Only one of those is weather doing something unusual, and the most common cause is somebody walking on the roof.
That matters because it changes how you think about the problem. A cracked tile is usually evidence of something that happened to the roof rather than of the roof wearing out, and the two have very different implications for what else might be wrong.
This article covers each cause, which breakages are urgent and which are cosmetic, why matching replacements is the awkward part, and when a few broken tiles are telling you about a bigger problem underneath.
Impact is the most obvious cause
Falling branches, dropped tools and hail all break tile, and the damage is usually localised to wherever the object landed. Clay is more brittle than concrete and tends to break more cleanly, but both will crack under a hard enough impact.
Hail is a real if intermittent local factor. The NOAA Storm Events Database records 98 hail reports in Maricopa County across the ten years from 2016 to 2025, 62 of them an inch or more across, with 16 reports at Scottsdale-labelled locations (NOAA NCEI).
Those are reports rather than every occurrence, and reporting is denser where more people live, so they describe observation as much as weather. The practical point is that hail here is occasional rather than annual, so impact damage is more often something that fell or was dropped.
Trees are worth a specific mention. A branch overhanging a tile roof is a slow-motion impact source, and the trimming is cheaper than the tiles.
Foot traffic breaks more tiles than weather does
This is the cause people underestimate, and it is the one most within your control. Tile is brittle and is not designed to be walked on casually, and a single trip across a roof by someone who does not know where to tread can crack a dozen tiles.
The City of Scottsdale’s own homeowner guide makes the point directly, describing clay and concrete tile as brittle and liable to break when walked on. It also says roof work can be dangerous and lethal for the inexperienced.
The usual culprits are not roofers. Satellite installers, solar technicians, air conditioning engineers, painters and pest control operators all end up on roofs, and most have no particular training in walking tile. If any trade has been on your roof, that is worth an inspection afterwards.
Can you walk on a tile roof? covers why the answer is almost always no, and what a professional does differently when access is unavoidable.
Wind lifts, moves and drops tiles
Wind does not usually shatter a tile outright. It lifts the leading edge, moves the tile out of position, and drops it back onto the one below, which is where the crack comes from. A roof can be full of hairline damage from a single storm with nothing visibly missing.
Wind is the dominant local hazard. The City of Scottsdale’s homeowner guide names it as the most damaging element in the southwestern desert, and the Storm Events database records 659 thunderstorm wind reports in Maricopa County over the decade to 2025.
Tiles at edges, ridges and hips take the worst of it, because that is where wind pressure concentrates and where the fixings are working hardest. A roof that has lost or moved tiles along a ridge line after a storm is showing a pattern rather than an accident.
Fasteners and battens fail quietly
Tiles are held by fasteners, by battens, or by a combination, and all of those age. Corroded nails, split battens and degraded mortar at ridges and hips all let tiles move, and a tile that can move will eventually break or slide.
This is the cause that overlaps with the roof genuinely wearing out, rather than with something happening to it. If tiles are slipping in several areas with no storm to explain it, the fixing system is the suspect rather than any individual tile.
Thermal movement drives a lot of this. The Scottsdale Municipal Airport station averages about 93 days a year at or above 100 degrees Fahrenheit under NOAA’s 1991 to 2020 normals, and the city’s guide describes attic heat expanding and contracting components and working nails loose over time (NOAA NCEI).
A cracked tile is not automatically a leak
This is the part that surprises people. On a tile roof the tiles are a rain screen and a sunshade, and the waterproofing is the underlayment beneath them. A single cracked tile over sound underlayment often leaks nothing at all.
That is why a roof can carry visible damage for years without a drop appearing inside, and why a homeowner who finds a broken tile is not necessarily facing an emergency. It is also why the absence of a leak is not evidence that nothing needs doing.
The real risk is exposure. A cracked or missing tile lets sunlight onto the membrane below, and ultraviolet light is exactly what ages that membrane fastest. The damage from a broken tile is usually done to the layer underneath, slowly, rather than to your ceiling immediately.
Slipped tiles expose the membrane fastest
A tile that has slid out of position is worse news than one that has cracked in place, because it uncovers a strip of underlayment completely rather than merely weakening the cover over it. In this climate that exposed strip starts ageing at a different rate from the rest of the roof.
It also breaks the drainage path. Tiles work as an overlapping system that sheds water downhill, and one tile out of position interrupts that for everything above it, so water that should have run over the top goes underneath instead.
That combination of exposed membrane and interrupted drainage is what turns a slipped tile into a leak during the next heavy rain. When a tile roof leaks in heavy rain covers how that presents indoors and how it gets diagnosed.
Tiles on the ground are the signal to act
Finding pieces of tile in the garden after a storm is the clearest signal a tile roof gives, and it is worth acting on rather than sweeping up. Fragments on the ground mean a tile somewhere above has either broken in place or come off entirely, and the roof is now open where it was not.
Collect the pieces rather than discarding them, because they tell a roofer the profile and colour being matched, which is useful if sourcing turns out to be difficult. Photograph where they landed too, since that narrows down which elevation to look at first.
The same applies to debris in gutters. Fragments of tile washing down into a gutter are often the first sign of ridge or hip damage, which is exactly the area most exposed to wind and least visible from the ground.
Matching replacement tiles is the awkward part
Sourcing the replacements is frequently a harder problem than fitting them. Tile profiles and colours change over the decades and manufacturers discontinue lines, and on top of that the colour of a thirty-year-old roof has shifted in the sun regardless of what the new tile looked like when it left the factory.
Scottsdale’s housing stock makes this common. Census American Community Survey 2023 five-year estimates put 102,546 of the city’s 138,422 housing units, about 74 percent, as built before 2000, and the city’s guide records tile becoming the material of choice in the 1990s (US Census Bureau).
The practical answers are limited and worth knowing in advance. Salvaged tiles of the same profile, tiles taken from a less visible elevation and replaced there with new ones, or accepting a visible difference. A roofer who raises this before starting is doing you a favour rather than making excuses.
Those census figures are survey estimates with margins of error, so read them as a picture of the housing stock rather than a count.
Repair is usually proportionate
A handful of broken tiles on a sound roof is a repair rather than a project, and treating it as one is the right response. The tiles are replaced, the underlayment beneath them is checked while it is accessible, and that is the whole job.
That check is worth insisting on. While tiles are off is the only cheap opportunity to see the membrane underneath, and a roofer who is already up there can tell you its condition at no extra cost. Declining to look is how a tile repair in one year becomes a surprise in the next.
The question worth asking is whether the breakage is a symptom. A few cracked tiles under a tree is an event. Tiles slipping across several elevations with no storm behind it is the fixing system failing, and patching individual tiles then becomes a recurring cost rather than a fix.
If the underlayment is also near the end of its life, the economics change again, because the tiles have to come off for that work anyway. That is the moment to ask whether two separate jobs should be one.
Where to start
If you can see broken tiles from the ground, or you have had any trade on the roof recently, get an inspection that goes up and reports in writing. Do not go up yourself: tile breaks underfoot, and the usual result of a homeowner inspecting tile damage is more tile damage.
If tiles are slipping rather than cracking, or the damage is spread across the roof, treat it as a question about the fixings and the membrane rather than about tiles. Our guide to roof problems in Scottsdale sets out how those failures present.
If you would rather have someone look at it, Residential Roofing Scottsdale works across Scottsdale and the surrounding Valley. Call (480) 919-1173, or read our tile roof repair in Scottsdale page for what a repair involves.
Frequently asked questions
These are the questions homeowners in this area ask most often about broken tile, which is the roof problem most people can actually see from their own garden. Each answer is kept short deliberately, with a link to the detailed article where one exists.
Will a cracked tile cause a leak?
Not necessarily. The underlayment beneath the tiles is what keeps water out, so a single cracked tile over a sound membrane often leaks nothing. The real damage is that it exposes that membrane to sunlight, which ages it faster than anything else.
How urgent is a broken roof tile?
It is rarely an emergency, but it should not be left indefinitely. The exposed underlayment beneath a missing or slipped tile deteriorates faster than the rest of the roof, so the cost of waiting is paid in membrane life rather than in immediate leaks.
What causes tiles to slip out of position?
Corroded fasteners, split battens, failed mortar at ridges and hips, and wind lifting and dropping them. Thermal movement contributes, because daily expansion and contraction works fixings loose over years, which the city’s own homeowner guide describes.
Can broken tiles be replaced individually?
Yes, and on a sound roof that is the proportionate repair. The harder part is usually sourcing tiles that match, because profiles get discontinued and an old roof has faded in the sun, so matching may mean salvaged tiles or borrowing from a hidden elevation.
Do I need to replace the whole roof if several tiles are broken?
Usually not, if the breakage is localised and the underlayment is sound. The calculation changes when tiles are slipping across several areas, which points at the fixings, or when the membrane is near the end of its life anyway.
Can I replace a roof tile myself?
It is not advisable. Tile is brittle and breaks underfoot, so the common outcome is more damage than you started with, and the city’s own guide calls roof work dangerous for the inexperienced. Replacement also involves lifting surrounding tiles without disturbing the membrane.