New build snagging survey in Tavistock

Tavistock's centre is a remarkable, largely intact Victorian planned town in green Hurdwick stone, built on mining wealth, with Georgian survivals and terraced miners' cottages in the villages around it. None of that historic fabric is where the new building goes. Modern estates sit on the fringes of the town, on the more ordinary ground away from the protected core, and it is those fringe estates this survey is aimed at.

Tavistock sits in the Tavy valley on Dartmoor's western edge, and it is consistently wet: the moor sits east, pulling in the prevailing south-westerly and funnelling rain up the Tamar valley from the other direction too, so the town gets weather from two directions rather than one. Steep sites are common, and the dataset notes wind loading on tall stone chimneys as a live local concern on the older stock, which is a fair warning for how seriously wind should be taken on any new roof here as well.

A dry-fix ridge or verge system needs to be properly wind-rated on a Tavistock fringe estate, not just adequate for an average Devon town, and checking that it has been fitted to that standard is exactly what an aerial survey close up can confirm or call into question.

A defects period that runs through a wet Dartmoor-edge winter is being tested harder than one somewhere sheltered. Booking the survey early in that window, rather than waiting to see what shows up, catches a marginal detail before a full moor-edge winter has had the chance to turn it into a leak.

Tavistock's postcode area is PL19. The Pannier Market and the abbey remains sit at the heart of the Hurdwick-stone centre, part of the wider Cornwall and West Devon Mining World Heritage Site, a useful marker for distinguishing the protected core from the fringe estates this survey actually covers, which sit further out on more ordinary ground.

Okehampton, Launceston and Ivybridge, all covered elsewhere on this site, share Tavistock's moor-edge exposure to a greater or lesser degree, and a plot near any of those boundaries is worth checking against the right page, since the exact balance of Dartmoor and Tamar valley weather shifts from one to the next.

Natural and Delabole slate, often with stone-bedded ridges, are the traditional coverings in this part of West Devon, though the modern fringe estates are more likely built with concrete tile, which needs its own wind-rating check rather than an assumption that it performs the way the older stone-bedded roofs nearby do.