I've got back a survey which highlights a problem with some dampness. It recommends checking in a cavity wall from the outside. What's involved with this and how much is this likely to cost? Thanks
With regard to the dampness within the cloakroom area, dampness from saturation of the external brick skin from rainwater and other pipework would not be transmitted to the inner skin unless the cavity was blocked. It is therefore essential to open up the external brickwork and examine the cavity to check for blockages. All blockages or bridging of the damp proof course should be removed and the external brickwork made good.