Chapter 1: Why are the tile-hung walls on our Eversley house shedding tiles and letting damp in upstairs?
What we find
Vertical tile hanging looks light, but each tile depends on a small fixing. A tile-hung wall carries clay tiles with two holes, hung from battens on nails or pegs, and many have a nib on the back that hooks over the batten. When the nails rust or the battens behind rot, tiles slip, tilt and drop to the ground. Where the wall rises out of the main roof, the junction relies on lead (a flashing is the strip that seals that joint), and lead that has lifted or split lets water run down inside the wall.
On an Eversley house the signs are fairly consistent: a bare patch on the wall where tiles are missing, a stain on the bedroom ceiling or wall near the abutment, and sometimes green growth in the joint where water never dries. Clay tile hanging also takes a lot of weather on its south and west faces, and the damage tends to show there first.
What we fix
We work from scaffold or a ladder, taking off the slipped area and checking the battens behind it. Rotten battens are cut out and replaced with treated timber, a breathable membrane goes behind if the old backing has failed, and the sound tiles are rehung with stainless steel or copper fixings that will not rust through again. Where tiles are missing, we source reclaimed ones in a matching orange, because new tiles seldom blend with weathered ones.
The abutment gets new lead flashing and soakers (small pieces of lead interleaved with the tiles so that water is carried over them and out). Our lead roofing and leadwork page explains how that is formed. Chimney leadwork is typically priced between £350 and £920 in UK cost guides, and the fixed quote only comes after the survey.