Chapter one
St Peter's flint and the lead beside it
Flint walls give a roof an uneven edge to seal against, so the lead and pointing at each junction decide how dry it stays.
Westhampnett's church and village lie on Stane Street, in the south of the parish. St Peter's is built of stone in the form of flint rubble, with some reused Roman bricks in the western part of the chancel, and it is roofed with tile except for its shingled tower cap. That cap is a different kind of covering from the tiles, so it gets its own look for gaps and rot where it meets the tower walls. Flint is a hard nodular stone laid in mortar, and a wall of it never gives a roof a straight line to work against. Wherever tile meets such a wall, the junction depends on lead flashing, and the lead in turn depends on what holds it, namely the mortar joint it is pushed into and the wedges that keep it from springing free.
At a glance
- St Peter's is flint rubble with reused Roman bricks
- Its roof is tile apart from the tower cap
- Uneven flint needs lead dressed into the joints

1.1 Lead on an uneven wall
On brick the lead lies flat. On flint it has to follow the bumps, so it is tucked into a raked-out joint, held with lead wedges and pointed over. When the pointing fails, rain gets behind the lead, and the damp can reach a ceiling a good way from the cause. At a survey we look at the joint, the lead's condition and whether sealant has been smeared on to hide a failure, because sealant over a loose flashing only postpones the leak. Leadworx names Code 4 as the code most often specified for general flashing, and reserves thicker sheet for heavier duty, and on a flint church or farmhouse our choice of code depends on how long the run is and how exposed it sits. Our lead roofing page explains the codes.

1.2 Who decides for a church roof
The parish church of St Peter is Anglican. For as long as it is open for worship, the Church's own faculty jurisdiction, not the district council, approves roof work, and that arrangement ends if the church closes. For a house the picture is simpler. Matching the existing tile and mortar is the sensible starting point, and aged roofs can house bats and nesting birds, which are legally protected, so the eaves and any gaps under the tiles get a look before stripping starts. Whether a conservation area or an Article 4 direction touches your address is something Chichester District Council's planning team can answer, and we ask the question before quoting for any change of covering.

Fig. 1 On the survey Lead pulled from a flint joint






