Damp and moisture meters
A socket on a dot-and-dab wall is cold and stained and the plasterboard was not pulled off. What void behind that socket was not inspected?
The void behind the plasterboard, in the dabs around that socket, was not inspected. The socket is cold and stained, and the board was not pulled off, so the cavity between board and masonry stayed closed. The survey can record a cold, marked face at the socket. It has not seen the void, has not traced a damp path inside it, and has not decided whether the stain is condensation on the board or moisture from the wall behind.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Dot-and-dab sticks plasterboard on dabs of adhesive and leaves a void. That void can be cold, and it can carry moisture the room never shows except at a socket cut, where the board is interrupted. Pulling the board off would be the way to look. It was not done. A cold stain is a reason to be interested in the void. It is not a view of it. The survey has not meter-mapped the masonry behind the dabs and has not called the whole wall wet.
Ask a damp surveyor or a plasterer who understands dot-and-dab if the void must be opened at this socket, and keep that as a further look. Tell the solicitor the home survey did not pull the board. Do not specify a tanking system from a stain around a faceplate. The unseen void is the limit. Until it is opened, the report should not pretend the space behind the socket was inspected.
What should you ask your surveyor?
- What void behind the socket was left uninspected?
- Why was the plasterboard not pulled off?
- Did the cold stain let you see into the dabs, or only the face?
What are the typical next steps?
- Treat the cold stained socket as a face note.
- Do not claim the void behind the dot-and-dab was inspected.
- Ask for a further look if that void must be opened.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If the socket works, has the void been cleared?
No. A working socket shows the electrics functioned in that moment, which the home survey did not test as an electrical inspection anyway. It does not inspect the void behind the board. The cold stain is still only on the face. The space in the dabs was not seen.
Can a dry skirting below mean the void is dry?
A dry skirting is another surface. It is not the void behind this socket, which was not inspected. Moisture in a dab cavity can show at the cut for the faceplate and nowhere else. The survey has not joined the skirting to a clearance of that hidden space. The board stayed on.