When assessing timber decay (particularly dry rot - Serpula lacrymans) in relation to dampness, the surveyor must understand that:

A property shows damp with characteristic black mould appearing in winter only, no salt deposits, high relative humidity (70%+), and visible condensation on windows. The cause is most likely:

During external inspection of a building for penetrating damp, the surveyor identifies: poor pointing on south- west elevation (high rainfall exposure), cracked brickwork in one section, blocked gutters, and failed downpipe junction. Internally, damp appears scattered over multiple areas. What is the surveyor's primary finding and recommendation?

Black mould identification in buildings should note that:

To diagnose condensation as opposed to rising or penetrating damp, the surveyor should observe: