Age and type of house
A barn conversion hangs a mezzanine from an old truss and no calculation is in the pack. Which load path is unverified?
The load path from the mezzanine into the old truss, and from that truss onward, is unverified. The conversion hangs a floor from a truss that belonged to the barn roof, and no calculation is in the pack. The survey can see the connection that is visible. It cannot see a design showing the truss and its supports can carry a floor. That path is the one left unverified. The visit has not calculated it and has not approved it.
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?
An old roof truss was arranged to carry roof weight out to the walls. A mezzanine adds the floor, people and furniture, hung on members that may not have been meant for it. Without a calculation, the pack does not show the path from joist to truss to wall. The fact the floor is standing is not a design check. Bolts can be present and still be unverified. The survey records the arrangement. It does not supply the missing design.
Ask the solicitor for any structural calculation or building-regulations approval for the mezzanine. The survey does not issue a building-regulations certificate. An engineer can review the load path if those papers are missing. Do not tell a lender the hanging floor is proved because it has not fallen. The inspection has not designed strengthening and has not said the truss is adequate.
What should you ask your surveyor?
- Where does the mezzanine connect into the truss?
- Is any engineer's calculation named in the pack?
- What supports the truss after the new load enters it?
What are the typical next steps?
- Ask the solicitor for the calculation and any building-regulations approval.
- Do not treat the standing floor as a proved design.
- If the papers are missing, ask an engineer to review the load path.
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
Has the survey issued building-regulations approval for the mezzanine?
No. The survey does not issue building-regulations approval. It saw a mezzanine hung from an old truss and no calculation in the pack. Approval, if it exists, is a paper the solicitor should ask for. The load path stays unverified in this report. A later certificate would be extra evidence, not something this visit created.
Does an old truss become a floor beam because it is still standing?
No. Standing shows it has carried the load so far. It does not show the path was designed for a mezzanine. No calculation is in the pack, so the survey has not verified capacity. Age of the timber is not a design check. An engineer would have to review it. The floor being up is not that review.