The short answer
A layered mix reflecting the town's mill, chapel and hillside history: older buildings with stone or slate coverings, terraces from the Victorian years with slate or tile, and later houses with interlocking tiles. We identify the covering first, because it decides everything that follows.
Nailsworth is a town of different dates sitting on different slopes. A mill, a chapel, a villa and a bungalow can stand within sight of each other, each with a roof built to its own rules. The survey starts by sorting out which rules apply.
Q1.1Is stone slate common on these hills?
The town lies in the Cotswolds, and stone slate roofing is traditional across that country. Cotswold District Council's technical guidance says old stone roofs survive all the way down the Cotswolds, as far south as the outskirts of Bath, with Campden at the northern end. Whether your particular house carries stone slate, clay, concrete or Welsh slate is something only a look at the roof will tell. Stone slate is heavy and laid in diminishing courses, so the biggest stones are hung low at the eaves and the slope shrinks to its tiniest pieces by the ridge. Our Cotswold stone roofing page explains the method, and the stone slate repairs page covers fixing slipped stones.
Q1.2What about the chapel and church-era buildings?
Roofs on public and religious buildings are usually bigger, higher and more ornate than those on houses: steep pitches, crested ridges, lead gutters behind parapets. A church that is still a Church of England church works through the faculty system, and its own advisers decide what is allowed. The houses built around such buildings are ordinary domestic roofs, and we treat them that way: a roof-top survey first, then pictures of what is wrong and a quote on paper.
Q1.3Which faults appear on Victorian terraces?
Slipped slates where nails have rusted, tired lead around chimney stacks, and cement fillets that have cracked at gable ends and let rain behind the verge. Damp in a gable wall or a brown ring appearing beside the chimney breast upstairs are the usual signs that one of these is under way. None of these is dramatic, but all of them admit water slowly, and slow water does the most damage to timber. Catching them early keeps a repair small, and that is what we aim for.