Age and type of house
Metal lintels on a house near the sea are rusting at the bearings. Why is that a corrosion note and not evidence of foundation heave?
Rust at the bearings is a corrosion note, not evidence of foundation heave. The metal lintels on this house near the sea are rusting where they bear into the wall. That is metal deteriorating at its ends, which salt air can aggravate. Heave would be the ground pushing the building up. The survey has not shown that mechanism from the rust, and it has not tested the wall ties or the foundations. It has recorded corrosion of those lintels. The coastal setting explains why the note is about steel, not about the soil.
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 metal lintel carries the masonry above an opening and sits into the wall at each end. If those ends rust, the lintel can swell or lose section, and cracks can appear around the opening. That pattern is still a lintel problem unless other evidence says the ground has moved. The survey can describe the rust and any local cracking. It should not be rewritten as heave because the house is near the sea. Sea air is a reason to take corrosion seriously, not a diagnosis of the foundations.
Ask the surveyor which openings are affected and whether the rust is at the bearings, the soffit, or both. A builder or a structural specialist can then look at those lintels as lintels if the corrosion is advanced. Do not commission a ground investigation as though the rust had already proved heave. Tell the solicitor the finding is corrosion of metal lintels, so nobody prices the wrong cause. The home survey has not opened the wall and has not measured foundation movement.
What should you ask your surveyor?
- Which lintels show rust at the bearings, and what cracking sits with them?
- Did you see any separate sign of ground heave, or only this corrosion?
- Have you kept the coastal rust as a lintel note rather than a foundation diagnosis?
What are the typical next steps?
- Read the rusting bearings as lintel corrosion.
- Do not relabel that rust as foundation heave.
- Get a lintel-specific opinion if the bearings are badly wasted.
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
If the cracks are diagonal, does that settle the cause as heave?
Not on its own. Diagonal cracks can sit with a wasting lintel or with other movement. The survey's point is the rust at the bearings of these metal lintels. The crack shape has not, by itself, proved that the foundations are heaving.
Does painting the lintel face end the corrosion note?
No. Paint on the visible face does not show the condition of the metal inside the bearings. The survey has not cleared those embedded ends by describing a painted soffit, and a coat of paint is not an inspection of the hidden section.