After the fire: roofs of the 1766 rebuilding
A village rebuilt within a short span carries its roofs' age in the nails, battens and underlay, not in the slates.
Heytesbury was rebuilt after the fire of 1766. That has a consequence two and a half centuries later. A covering laid within a few years of its neighbours tends to age at about the same pace, so the faults arrive together: nails that have corroded through, battens that have softened where water sits against them, and slates or tiles that have begun to slide in their courses.
The covering itself is rarely the first thing to give out. In the field, a sound slate sitting on a rotted nail is a common sight, and a slipped course shows up from the road as a gap or a dark line. What matters is the distinction between local failure and general exhaustion. A few slipped units among many sound ones can be dealt with individually, each secured with a tingle, which is a thin copper or lead strap standing in for the failed nail. When the nails have gone across a whole slope, patching is a false economy, because the next row will follow.
The decision is made from under the roof as much as from over it. Old roofs often have no underlay, only the back of the covering. Light shining between slates from inside, soft battens and dark stains at the foot of the rafters give a more reliable picture than the surface does. Where a roof has to be stripped, we sort and keep the good slates, fit fresh battens and underlay, and bring in replacements that match for size, colour and thickness. Our slate roofing page explains how that works for natural slate.
For listed buildings in the village, the nature of the repair decides whether consent is needed. A straight match, material for material, is one conversation with Wiltshire Council. A change of covering is a different one.



