Structure
How should you read a steel frame that sits behind the brick?
A steel-framed house uses a steel skeleton with a brick or other skin. A home survey can name that construction when the frame is visible, and it can describe rust or cracked cladding it could see. It does not test the steel, certify a repair scheme, or tell a lender to lend. Lenders set their own criteria.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless a source says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
Why is a brick skin not proof that the steel frame is sound?
The brick, render or cladding is a covering. It can look ordinary from the street while the steel behind it is the thing that holds the house up. A survey that could not open the covering has not inspected the frame. A quiet elevation is a note about what was visible, not a test of the steel.
Approved Document A is guidance for building work on structure. It is not a rating of this house and it is not a certificate that the frame was built to it. If the report names a system, ask what was actually seen and what stayed covered.
What rust can a visual survey record on a steel frame?
Only rust it could see: a stanchion base where cladding is missing, a stain at a fixing, or a flake of coating on an exposed member. It cannot see steel inside a sealed cavity. It cannot say how much section is left, and it cannot sign a repair method.
A repair scheme, if one exists for that system, is a specialist document. The home survey does not attach it unless it was in the papers on the day, and even then the surveyor has not certified the work. Ask the solicitor what drawings and guarantees are actually in the pack.
Does naming the frame mean a lender will refuse the house?
No. RICS is clear that Level 1 and Level 2 are aimed at conventional construction, and that unusual construction is a different instruction. That is about the survey product. It is not a list of houses a lender must decline. Each lender sets its own criteria, and this page does not invent them.
A mortgage valuation is a separate job from the condition survey. A valuation that says nothing about the frame has not cleared it, and a condition note that names the frame has not valued the house. Keep the two documents apart when you talk to the lender.
Common questions
Cladding is missing on one corner only. Has the rest of the frame been seen?
No. The open corner is the part that was visible. Steel still covered on the other elevations was not inspected. Do not read one exposed stanchion as a survey of the whole frame.
The exposed steel has a black coating. Is that a repair the survey has approved?
A coating is something the surveyor could see. It is not a certificate, and the survey has not tested what is under it. Ask what system the house is, and whether any repair papers are in the legal pack.
There is no repair certificate in the pack. Has the survey failed?
The survey describes condition. Certificates are papers. A missing certificate is for the solicitor to chase. It does not, by itself, mean the steel has failed, and a certificate would not replace a look at rust the surveyor could see.
The house looks like an ordinary semi. Why mention the frame at all?
Because the structure may not be the brick you can see. If the report names a steel system, that name is the point. Looking ordinary is not evidence the frame was conventional.
A rust stain shows at the foot of one stanchion. Is the house unsafe?
The stain is a reason to ask what steel is left and whether a specialist should open that corner. It is not, on its own, a decision that the house is unsafe, and the survey has not calculated a loss of section.
The firm suggested Level 2 after the agent had already named a steel system. What do you ask about the scope?
Whether that product is the one they use for this construction. RICS describes Level 1 and Level 2 for conventional homes. Unusual construction is a reason to ask about Level 3 before you instruct, not after you have relied on the wrong scope.
The neighbour's identical house was mortgaged. Does that clear this one?
No. Another buyer's lender, on another day, is not your instruction. The survey of this house does not know that decision, and it does not copy it.
The surveyor did not open the cavity. What is still unknown?
The condition of the steel that the skin still covers, and whether a previous repair sits behind the cladding. The report should say the cavity was not opened.
Sources
Key facts
- What it is
- A frame of steel, often hidden behind brick, render or cladding. The skin is not the structure.
- What the survey can see
- Rust at an exposed stanchion, cracked or loose cladding, and whether the system was named.
- What it cannot do
- No laboratory test of the steel, no repair certificate, and no instruction to a lender.
- Survey level
- RICS describes Level 1 and Level 2 for conventional homes. Unusual construction is a reason to ask whether Level 3 is the product they offer.