Age and type of house
If a timber-frame house is lined with plasterboard, has the survey seen the frame?
Not if the lining stayed in place. Plasterboard, often on battens with a gap behind it for services, is a finish, so the studs and sheathing were not seen, and a brick outer skin is a further layer rather than a view of the timber. The report should say the frame was not seen, rather than describe timber it did not look at.
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?
Fire stopping at a party wall is a different question, already worth asking where two frames meet. This one is about access inside the house you are buying. A service void can hold pipes and cables the surveyor will not test. It does not become a structural inspection because a socket was unscrewed. The Level 1 scope does not include removing secured panels, and a standard home survey does not open the structure as a matter of course.
A brick skin can still be mistaken for a cavity wall. Here the point is narrower: even if the surveyor knows there is a frame, the lining stopped them seeing it. Ask which parts, if any, were visible in a cupboard or a loft, and do not let one glimpse stand for every wall. There is no reason to cut the plasterboard before you own the house.
What should you ask your surveyor?
- Which parts of the frame did you actually see?
- Is the plasterboard on a void, or fixed in a way you could not judge?
- Are you describing the brick skin, the lining, or the timber?
What are the typical next steps?
- Do not read a smooth internal wall as a sound frame.
- Ask the report to say unseen where the lining was not opened.
- Leave fire stopping as its own question if the wall is shared.
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
Does a brick outer leaf prove there is a cavity and wall ties?
No. On a timber frame the brick can be a skin. Ask what was seen, and do not import a cavity-wall repair.
Will the survey unscrew the lining as standard?
No. Secured linings stay put unless you agreed something else. Unseen means unseen.