Non-standard construction
What should you ask where a concrete lower storey meets a timber upper storey?
Ask about that line: cracks, a gap, staining, a flashing, or a shelf where the materials change. The junction is a condition question, while a certificate, if one exists, is paper the survey may not have read. The paper does not replace the junction on the day, and a missing paper does not invent the system.
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?
Water likes the change of material. So does movement, because the two parts do not behave the same way. The survey should say whether it could see the junction outside and in, or only one side. A standard inspection does not strip claddings. If both storeys were only inferred, the report should not draw a precise detail it did not see.
If the seller produces a repair certificate later, read what it covers. It might deal with one material and not the joint you are looking at. Your solicitor looks at the paper. The survey looks at the building. Do not average them into “it was repaired, so the crack does not count”. A crack that is there still needs the words the surveyor used.
What should you ask your surveyor?
- Could you see the junction, or only the two finishes?
- What is the condition of that line, in words?
- Did a certificate form part of your inspection?
What are the typical next steps?
- Describe the junction to anyone you ask for a quote.
- Read any certificate for what it actually covers. Do not let it delete a crack.
- Do not give the whole house one material name because the ground floor is concrete.
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
Is the upper timber a reason to ignore the concrete?
No. Each part, and the line between them, can have its own defects.
Does a guarantee of the concrete panels cover the timber storey?
Only if the document says so. The survey should not guess the small print it did not read.