Does the surveyor have to cut a plaster sample before they are allowed to mention damp?

What is the fuller explanation?

A home survey is visual. None of the levels guarantees concealed parts, and a standard Level 1 or Level 2 does not remove secured panels. Cutting plaster is opening up. It needs the owner's consent, it damages the finish, and it answers a narrower question than the inspection. The surveyor is still entitled to describe a tide mark, mould or a high surface reading, and to say how uncertain that description is. Silence until a laboratory sample exists would hide the very clue you are paying them to record.

A sample, if you later agree one, tells you about that piece of plaster. It does not map the whole house, and it is not required before the report may use the word damp. The Property Care Association's homeowner advice is about understanding moisture, not about forbidding a surveyor to speak until the wall is chased. If the sentence recommends further investigation, that is the moment to discuss a sample, a plumber or a roofer. Do not confuse that recommendation with a hole that should already have been cut.

What should you ask your surveyor?

• What did you actually see, as against what a sample might later show?
• Are you recommending opening up, or only recording the surface?
• Would a plaster sample change the access limits you have already written?

What are the typical next steps?

1. Do not delay reading the damp comment because no plaster was cut.
2. Do not expect the survey fee to include opening the wall.
3. If you want a sample, agree it with the owner as a separate visit with a written scope.

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

Which pages should you read next?

• Can an unheated house on a cold viewing feel damp without the walls being saturated?
• Can a leak in the porch roof wet the porch floor without the house damp-proof course having failed?
• Air bricks are only on the front and the rear void has none the surveyor could see. What ventilation of the floor has not been shown?
• Guide: What does damp mean in a home survey?
• All UK home survey questions

Sources

• RICS: RICS Home Surveys (Home Survey Standard)
• Property Care Association: Structural problems, including damp, dry rot, wet rot and woodworm (homeowner advice)
• GOV.UK: Damp and mould: understanding and addressing the health risks for rented housing providers