Non-standard construction
Is an aluminium bungalow frame, together with the ring beam, any evidence on corrosion the internal lining hides, or only a note of what was visible?
Hidden corrosion is not shown here. An aluminium bungalow frame and its ring beam were recorded as construction the survey could name or partly see. They are not evidence of corrosion hidden by the internal lining, because that lining was not removed. Aluminium can corrode where it stays damp or where it meets other metals, but this visit did not expose those faces. The report notes the frame and the beam. It has not decided that hidden metal is sound or pitted.
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?
A ring beam ties the tops of the frame members and often sits behind eaves linings and ceiling edges. Internal plasterboard or fibre lining conceals the legs and the connections. Condensation on a cold metal frame is a known risk in some of these bungalows, yet a risk is not a measurement of loss of section. The survey did not cut linings and did not test the metal. Visible paint on a skirting line is not the ring beam.
Ask the solicitor for any earlier opening-up report, coating specification or structural note on the aluminium frame. Without that, the lining still hides the question the survey could not answer. A specialist can expose agreed points if you need the ring beam and the legs seen. Tell a lender the frame was identified as aluminium and that corrosion behind the lining was not inspected. Do not convert the system name into a clean bill of health.
What should you ask your surveyor?
- Was the ring beam seen, or only inferred behind linings?
- Did the visit remove any internal lining to look for corrosion?
- Is the aluminium frame named rather than tested?
What are the typical next steps?
- Treat hidden corrosion as uninspected.
- Ask the solicitor for any opening-up or coating records.
- Tell a lender the lining was left in place.
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 white staining on a skirting prove the frame has corroded?
No. Salts or staining low on a wall can have several causes, and they are not a view of the aluminium. The lining was not removed, so the ring beam and the legs were not examined for pitting. Note the stain as a separate damp comment if the report makes one. It is not a metal test.
Are aluminium frames the same as steel stanchion frames?
No. Both can be non-standard metal systems, but the metal, the sections and the usual defects differ. This report is about an aluminium bungalow frame and a ring beam, not about a steel stanchion house. Do not copy advice written for a different system. The limit here is what the lining still hides, which this visit did not open.