Subsidence, settlement and heave
A crack has been stitched with helical bars. Can the survey say the movement has stopped?
No. The bars show that someone tried to tie the masonry back together across a crack, but they do not show that the ground has stopped moving. A home survey can see the slots, the filled chases or the ends of the bars if they are visible, yet one visit does not monitor the crack and the survey does not test 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?
Helical stainless-steel bars, often sold as Helibar, are set into bed joints across a crack so the bricks act together again. That is a repair to the wall, not a measurement of the ground. The Association of British Insurers describes subsidence as downward movement of the ground. Stitching does not reverse that definition and it does not prove the cause has gone. Fresh mortar in the slots only proves that the slots were made and filled.
The surveyor should say what is visible and what is not. Bars buried in the joint cannot be load-tested on a normal inspection. A guarantee, if the seller has one, belongs to the firm that installed the bars and covers whatever that document says. It is not a finding that the house is static. If you need to know whether the crack is still opening, that is a monitoring exercise over time, instructed on purpose. The survey you have already had cannot be stretched into that.
What should you ask your surveyor?
- Where can you see the stitching, and where is it only assumed?
- Is there a new crack in the mortar that filled the slots?
- Are you able to say the movement has stopped? If not, what sentence should I rely on?
What are the typical next steps?
- Ask the seller for any specification and any guarantee, and read what they actually cover.
- Do not tell a lender the bars have cured the ground.
- If you still need a trend, agree monitoring separately. Do not expect this report to supply it.
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
Do the bars mean the crack was subsidence?
No. People stitch cracks from several causes, including old shrinkage and lintel movement. The bars do not name the cause.
Can you rely on the bars if the slots have reopened?
Reopened slots are a reason to ask a structural engineer, not a reason to assume the stitch is working. The survey still has not tested the soil.