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Dry roofing on flat tile roof

The ridge ensures the joining of the two sides of a tiled roof

The installation of the roof tiles makes it possible to make the junction between the two sides of a roof.
These tiles, which cover on each side flat tiles (called sub-ridge), must ensure not only sealing, but also the holding of the last row of tiles. They must also withstand the strongest winds. They can be set up according to the technique of the interlocking and nailed, this is the case of this model, or with mortar joints (called with embarrassments) with a plain model.
Coverage intervention is risky. It is therefore necessary on the one hand to avoid working alone, and on the other hand to ensure its safety: fixing ladders or scaffolding, wearing and hanging a safety harness, helmet, work shoes, glasses and gloves.


  1. Set up the ridge
  2. Wedge the tiles to ensure the tightness

Set up the ridge

Laying the pediment tile

The pediment tile is the junction between the two sides of the roof

1. The work starts with the installation of the pediment, a special tile that makes it possible to join the roof tiles of the two sides of the roof.

Setting up the ridge

Ridges arise in contrast to prevailing winds

2. Ridge laying is done in the opposite direction to the prevailing winds, to prevent them from rising in strong winds.

Nailing the ridge

The fixing of the ridge is done with nails

3. The tiles are laid dry, due to a compulsory fixation (lag bolt or galvanized nail) on the ridge tip.
Each tile has two non-through nailing holes. It is necessary to provide additional sealing on the head of each point or lag bolt.

Continuation of the laying of the ridge

Ridges are laid by overlapping

4. The roof tiles are laid by overlapping, the first against the pediment, the second on the first, and so on.
Each tile is nailed to the previous one, because of the alignment of the holes arranged at each end. Thus, each is fixed at the head and tail.

Wedge the tiles to ensure the tightness

Tiling the tile.

Tile rigging

1. Each tile must be perfectly positioned before installing screws or nails. Any shift will cause leaks, penetrations of water or snow, especially in case of strong wind.

Finished dry work

Once laid, the roof tiles ensure the waterproofness of the roof

2. The waterproofing of the roof is ensured once the roof tiles are finished. Indeed, the roof tiles flatten their edges on the row of sub-ridge tiles on each side of the roof. This arrangement prevents water and snow from rising, especially when pushed by the wind.

(photos / visuals: © Terreal, except special mention)

On the same topic

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  • Questions answers
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    • What is the risk of deformation of Flexoutuile plates under the effect of heat?
    • Replace tiles or repaint them?
    • How to make a garden shelter cover reliable and durable?

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