Age and type of house
A sea-facing cavity wall is only suspected of wall-tie failure. Has salt air, by itself, proved the ties have failed?
No. Salt air has not proved the ties have failed. The report only suspects wall-tie failure, and suspicion is not proof. The cavity was not opened, so the ties were not seen, and salt air is not a test result. A sea-facing elevation does not, by itself, demonstrate that the ties are corroded or broken. Repeat the suspicion as a suspicion, and leave any opening of the wall to a further instruction.
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?
Coastal houses make the storey sound finished before anyone has looked. Salt is real weather. It is not a reading from a tie that is still inside the cavity. The inspection of a cavity wall from the outside sees the outer leaf, the mortar, any bowing or cracking that is visible, and sometimes staining. It does not see the metal in the void unless the wall is opened, which this visit did not do. No survey level guarantees concealed parts are sound, and the mirror of that sentence matters here: concealed parts have not been proved failed either.
If the surveyor suspects tie failure, ask what they saw that prompted the suspicion, and what they could not see. A rating, if they gave one, belongs to that visible concern. It is not a laboratory result. Rating 3 would mean serious and/or urgent and would point a buyer toward written quotations or investigation before legal commitment. It would still not be salt air standing in for an opened joint. Do not let an agent upgrade suspected to failed because the house is on the coast. The coast explains why someone might worry. It is not the test.
What should you ask your surveyor?
- What did you see that led only to a suspicion, not to a demonstrated failure?
- Was the cavity opened at any point?
- What further opening would be needed before anyone could speak about the ties themselves?
What are the typical next steps?
- Describe the ties as suspected, not as proved failed.
- Do not treat sea air as a test result.
- If the wall needs opening, make that a separate instruction.
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 a cavity-wall comment mean the ties were inspected?
Not if the cavity was not opened. Concealed ties were not seen.
Is suspicion the same as a failed test?
No. Suspicion is not proof. Salt air does not convert one into the other.