Home › Repair or replace › Tile roof repair: what to look for from the ground and why not to walk it

Tile roof repair: what to look for from the ground and why not to walk it

By · Updated

Clay and concrete tiles shed water, but the underlayment beneath them keeps it out. Here is how to read the signs without stepping on a single tile.

Tile roof repair starts with a surprise: the tiles are not what keeps your house dry. They shed most of the water. The layer underneath, called underlayment, does the sealing. When a tile roof leaks, the tile is often fine and the layer below has aged out. We show what you can check from the ground and the attic, and why we skip the on-roof steps.

Tiles shed water, underlayment stops it

Clay and concrete tiles overlap like fish scales. Wind-driven rain still gets under them. The underlayment catches it and sends it down to the eave. That layer wears out long before the tiles do. A roof can look perfect from the street and still leak at the first heavy storm.

What you can see from the ground

Use binoculars from the yard. Look for these signs:

  • Cracked or missing tiles, which show as dark gaps in the pattern.
  • Tiles that sit out of line with their neighbors, a sign they have slipped.
  • Broken ridge or hip tiles along the high lines.
  • Heavy moss or algae in the valleys, where water runs.
  • Stains on the fascia or soffit below the eave.

A single cracked tile is not an emergency. A cluster of them, or a slipped patch, deserves a visit from a licensed roofer.

Check the attic on a dry day

Take a flashlight into the attic. Look at the underside of the roof deck for dark streaks, damp insulation and daylight where there should be none. Water often runs along a rafter before it drips, so the stain can sit well away from the entry point. Mark where it lines up with a chimney, a valley or a pipe. Those are the usual weak spots.

Why you should not walk a tile roof

Tiles are brittle. Your weight cracks them, and a cracked tile you cannot see becomes the next leak. They are also slippery with dust, moss or dew, and many tile roofs are steep. So this is a case where being careful and being useful point the same way: do not go up. See working at height safely. The same logic runs through patching a roof in general.

Replacing tiles is the easy part

Swapping a broken tile takes minutes for a trained crew. The hard part is knowing why it broke. Was it a branch, hail, foot traffic, or a roof deck that has shifted? If the answer is the underlayment, the fix means lifting whole sections. A good roofer says so and shows you photos.

When repair stops making sense

If water stains show up in many places, or the underlayment is brittle across the whole roof, patching tiles buys little time. A sagging line along the ridge points to structure. That needs a licensed structural engineer, not a repair crew. Our repair or replace guide sets out the questions to ask.

What to ask a roofer

  • What is the condition of the underlayment, and how do you know?
  • Do you have matching tiles, or will the patch show?
  • Will you photograph the work before and after?
  • Who is responsible if a leak returns at the same spot?

Pick someone with tile experience, since the work differs from shingles. See hiring a roofer. We do not publish prices.

Frequently asked questions

Why does my tile roof leak if the tiles look fine?

The underlayment beneath the tiles does the waterproofing, and it ages out before the tiles do. Leaks often start there.

Can I walk on a tile roof to check it?

We advise against it. Tiles crack under weight and the surface is slippery, so a licensed roofer should do any work on top.

How do I check a tile roof without climbing?

Use binoculars from the ground for cracked, missing or slipped tiles, and check the attic for stains and daylight on a dry day.

Is one cracked tile a big problem?

Usually not on its own. A cluster of cracked tiles or a slipped patch is worth having a roofer look at.

When is a tile roof past repair?

When the underlayment is failing across the roof or leaks show up in many places. If the ridge sags, call a structural engineer.

Sources

What this page explains is based on these official sources. If you check one and it does not match what you read here, send it to us and the article gets corrected.

Keep reading