Stage 02 · Walls and edges
Sandstone, brick and flint beside the roof
The appraisal names Pulborough Sandstone, Carstone or ironstone, Sussex brick and flint, and wherever a roof meets those walls the sealing work matters.
The walls in the older part of the village are built of local stone, ironstone, brick and flint, according to the council's appraisal. None of those tells you what is on the roof above, but all of them tell you where the weak points are likely to be. Water finds its way in where a slope butts up to a wall, around a chimney stack, and along a gable edge. These joints are sealed with flashing, and a flashing cut into a flint wall is not the same job as one set into plain brick, since flint leaves no neat mortar course to follow.
Why do chimneys and abutments leak before the tiles do?
A tile is a simple, overlapping thing. A junction is not. Where the roof meets a wall, the sealing is made of separate parts: lead or other metal let into the wall, soakers tucked under the tile edges, and mortar that has to hold against the weather. Any one of them can fail and let water run down behind the plaster long before a tile moves. We check each from the ladder and the loft. For lead we follow the standard sheet codes, and the heavier codes suit flashings better than the lightest code, which is recommended for soakers only. Our lead work page explains what we repair or renew.
Where roof meets wall
- Flashing
- Strip of metal sealing a junction
- Flaunching
- Mortar bed fixing chimney pots in place
- Soaker
- Lead sheet tucked under a tile edge
- Abutment
- Junction of a slope with a rising wall