Chapter one
Terraced roofs along Handcross High Street
Terraces and shops share walls, stacks and gutters, so lead work and neighbours matter on this street.
Mid Sussex District Council describes the Handcross historic core as 19th-century, with terraced houses and shops lining both sides of the High Street. A terrace is one long roof cut into slices by party walls, the shared walls between neighbours, and every slice meets the next at a junction. That is where we look first. On a terraced roof the water seldom comes in through the middle of a slope; it comes in where the tiles stop and the brick starts, along the abutment, around a shared stack or in the gutter that two houses drain into.
At a glance
- Terraced roofs share walls, stacks and gutters
- Lead flashing seals each roof to its party wall
- Neighbours must be told before a party-wall chimney comes down

1.1 Flashings, soakers and shared gutters
The metal that seals a roof against a party wall is the flashing, usually lead, stepped to follow the slope. Under it, small folded sheets called soakers sit beneath each course of tiles and carry water out over the surface. When lead lifts or soakers corrode, rain finds the gap and soaks into the wall plate, then shows as a damp patch inside, sometimes in the next house. We trace it from inside the loft and photograph it from above. A shop at the foot of a terrace often has a flat or lean-to extension behind it, and the point where that meets the pitched roof is another favourite entry for water. Where a shop sits under the roof, a gutter hidden behind the fascia board is a frequent culprit: its outlets are small, and a blocked one spills over into the masonry below. Our lead roofing page explains how the work is done, and our chimney repairs page covers shared stacks.

1.2 Neighbours and the party wall
Because a terrace is shared, some work involves the people next door. Under the party wall rules on GOV.UK, taking a chimney off a shared wall is notifiable: the neighbour must hear from you two months to a year ahead of the start date, and a lack of reply is not consent. Taking the breast out itself calls for Building Regulations approval every time. Ordinary repairs on your own side need none of that. Even so, telling the neighbours before scaffold goes up saves awkward conversations, and where two houses both want work, a single scaffold can often serve both and halve the cost of access for each.
Lead sheet codes for flashings and soakers
| Code | Thickness | Typical use |
|---|---|---|
| 3 | 1.32 mm | Soakers and light duty only |
| 4 | 1.80 mm | General flashings, the usual choice |
| 5 | 2.24 mm | General, vertical and pitched work |
| 6 | 2.65 mm | Larger roofs |




