Non-standard construction
A prefabricated concrete panel joint is open on a post-war house. Has the survey named the system or tested the concrete?
No. The survey has neither named the system nor tested the concrete. An open joint in a prefabricated concrete panel on a post-war house was recorded as a gap the eye could see. Many different systems used panels of that era, and an open joint does not identify which one this is. The visit did not sample the concrete or the reinforcement. The report notes the joint. Naming and testing remain undone.
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?
Post-war prefabricated houses rely on the panel, the joint and often hidden reinforcement working together. An open joint can let water into that edge and can mark movement or shrinkage, but the cause is not settled by the gap alone. System names matter because lenders and specialists treat different systems differently, and a visual label of “concrete panel” is not a name. Testing the concrete is a separate instruction. This visit did not do it and should not be read as if it had.
Ask the solicitor for any system identification, PRC certificate or engineer’s report already in the seller’s papers, and keep those documents apart from this note. A lender may want the system named before it will proceed, which this survey has not done. Do not ask anyone to drill the panel on the back of the home survey. If testing is commissioned, it needs its own instruction and its own result.
What should you ask your surveyor?
- Where is the open panel joint described?
- Does any sentence actually name a system?
- What shows the concrete itself was not tested?
What are the typical next steps?
- Treat the open joint as a visual note only.
- Ask the solicitor for any existing system identification.
- Keep any concrete test separate from this survey.
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 an open joint prove the reinforcement has failed?
No. An open joint shows a gap at the panel edge. It does not show the reinforcement, and the survey did not test the concrete. Failure of hidden steel is a separate question that needs investigation beyond this look. The report has named neither the system nor a defect inside the panel. It records the joint that was visible.
Can a neighbour’s house name this system for you?
No. A similar house nearby does not identify this one. Post-war estates can mix systems, and this visit did not name the system here or test this concrete. Use papers for this address, not a guess from next door. The survey’s finding stays the open joint it could see.