Chartered surveyors in Blackburn

Normally solid walls of brick or stone with no cavity, lime mortar, timber suspended floors and lath-and-plaster internally. Any damp-proof course is either slate or absent altogether.

What we usually find. Damp at low level is the most frequent finding, usually where a slate damp-proof course has been bridged by raised ground or by later solid floors and cement render. Chimney stacks, roof coverings and rainwater goods are often at or beyond the end of their serviceable lives, and earlier repointing in cement rather than lime can trap moisture and spall the brick face.

Worth knowing. Solid walls cannot be treated like cavity walls. Injected chemical courses and internal tanking frequently move the problem rather than resolve it, so the cause matters more than the last remedy applied.

Cavity walls with insulation increasingly built in, flat-roofed elements such as garages, dormers and rear additions, and a broader range of manufactured materials.

What we usually find. Flat roofs of this era are frequently on their second or third covering and are a common source of water ingress. Textured coatings applied before the mid-1980s may contain asbestos, as may some cement products, soffits and floor tiles.

Worth knowing. Asbestos-containing materials are usually safe if undisturbed and in good order, but they matter a great deal if you intend to remove ceilings, take down a garage or open up the layout.