How to Repair or Replace a Broken Tile: The Step-by-Step Guide

A broken tile is not just a simple aesthetic annoyance: it lets rain through, weakens the under-roof and can eventually cause leaks into your loft. The earlier you act, the less the damage. Good news: replacing a tile is within the reach of a careful DIYer, provided you respect a few strict safety rules, because you are working at height.

Assessing the job before going up onto the roof

Before anything else, observe the roof from the ground with binoculars. Locate the broken tile, check whether there are cracked neighbours, and look at whether the battening or the roofing board under the tile seems to be in good condition. If there are holes in the substrate, or if several tiles are damaged over a large area, the job becomes more complex and deserves a professional's opinion.

• Check the weather: only work in dry, windless conditions, and never when the roof is wet or frozen.
• Never go up on a roof alone: a second person must stay on the ground for safety and to pass you the materials.
• If you have any doubt about the condition of the trusses, the covering or if the pitch is very steep, call in a roofer.
• Before buying a replacement tile, note the model: interlocking tile, flat tile or barrel tile, with the exact colour and finish.

The equipment and the price of a new tile

A replacement tile generally costs between 1 and 3 € each for a standard interlocking tile, sometimes more for old models or flat terracotta tiles. Allow between 10 and 25 € for a set including the ridge tile if needed. Ask a building materials merchant or a reclaim yard to find the right shade: a tile that clashes in the middle of a roof is immediately noticeable.

• Replacement tile identical to the existing model (1-3 €).
• Protective gloves and safety glasses.
• Chisel or cold chisel to remove the debris, and a hammer.
• Awl or simple nail to hook the tile if it is a hook tile.
• Stable ladder, ideally with a stabiliser, placed on flat ground.
• For fragile or steep roofs: scaffolding or a safety harness connected to an anchor point, to be entrusted to a professional.

The steps to replace the broken tile

1. Access the roof by a stable ladder: it must extend at least three rungs above the resting point, and be wedged on firm ground.
2. Remove the broken tile from underneath, sliding it upwards to release it from its hook or nail, then take it out sideways.
3. Carefully remove all the terracotta debris left on the roofing board and in the gutters, by hand or with a broom.
4. Check the condition of the substrate: if it is rotten, damp or holed, stop and have the roof diagnosed by a professional.
5. Slide the new tile in, wedging it in line with the neighbouring tiles, starting at the bottom of the hook.
6. Check the overlap: the tile must be aligned with its neighbours and the hook must hold it securely.
7. Check from the ground, stepping back, that the tile is in the plane of the roof and does not stick out.

The mistakes to avoid

• Going up on a wet roof or after rain: terracotta becomes extremely slippery.
• Leaning or walking at the edge of the roof without protection, especially on the ridges and verges.
• Breaking other tiles by walking on them: walk in the hollow of the tiles, on the areas supported by the roof structure, or use a roofer's crawling board.
• Using a tile of the wrong shade or another model, which creates a visible patch and doubtful watertightness.
• Not checking the gutter after the job: the debris can block the downpipe and make water overflow.

When to call in a roofer?

If the roof pitch is steep, if the building has more than two storeys, if several tiles are broken, or if you discover a damaged substrate, do not take the risk: a roofer works with scaffolding and a harness, and can check the watertightness of the area. The price of a small roof repair by a professional generally ranges between 150 and 400 € depending on the region and accessibility.

Replacing a broken tile is therefore often within your reach: a few tools, a suitable tile at 1-3 €, and a well-wedged ladder are enough for a durable repair. But the golden rule remains safety: if you have the slightest doubt at height, a professional will do the job faster and safely. By acting at the first cracks, you protect your roof structure and avoid costly leaks.