The centre of Durham has changed little in two hundred years, and Georgian and older buildings are common around it. Old slate, stone and lime pointing do not respond well to blasting. Soft washing uses low pressure and a dilute cleaning solution that kills growth at the root, so the surface is cleaned rather than eroded.
Gutters on older houses can have deep joints that trap silt. Vacuuming lifts that sludge out along the full length of the run, and the camera lets you see cracked joints or tired brackets that would otherwise go unnoticed until they overflow.
Annfield Plain, Barnard Castle, Belmont, Billingham, Bishop Auckland, Brandon, Browney, Burnopfield, Blaydon, Carville, Chester-le-Street, Chilton, Consett, Coxhoe, Crook, Darlington, Dragonville, Eaglescliffe, Easington, Edmundbyers, Elwick, Esh Winning, Ferryhill, Finchale Priory, Framwellgate Moor, Gilesgate, Great Lumley, Greta Bridge, Hartlepool, Hamsterley, Hedworth, High Shincliffe, Houghton-le-Spring, Ingleton, Kelloe, Kirk Merrington, Lanchester, Langley Moor, Langley Park, Lintz, Meadowfield, Middleton-in-Teesdale, Mount Pleasant, New Coundon, Newton Aycliffe, Newton Hall, Wingate, Peterlee, Pity Me, Rushyford, Sacriston, Seaham, Seaton Carew, Sedgefield, Shildon, Spennymoor, Stanley, Stockton-on-Tees, Tanfield, Thinford, Tindale, Tow Law, Trimdon, Tudhoe, Ushaw Moor, West Rainton, West Auckland, Wheatley Hill, Willington, Witton Gilbert, Wolsingham.
