Hipped extension roof in slate-effect tiles

A single-storey hipped roof was covered in slate-effect interlocking tiles, with clay-coloured hip tiles clipped on a dry hip system. Where the new roof meets the two-storey house wall, a lead abutment flashing keeps rain out of the junction.

Where extensions usually leak

Most leaks on single-storey roofs are not in the middle of the tiles. They are at the junction where the extension roof meets the main house wall, because rain runs down the wall and straight into that joint.

A lead abutment flashing, stepped or chased into the brickwork, is the standard way to close that junction. On this job the flashing runs along the wall above the top course of tiles.

Slate look without the weight

Slate-effect interlocking tiles give a flat, modern slate look but lay faster and cost less than natural slate. They also suit low to medium pitches that are common on extensions.

The photos were taken after rain, so you can see water running cleanly off the tiles and hips into the gutter.