Subsidence, settlement and heave
Cracks radiate from a ceiling rose and do not follow a board joint. Why is that a weak match for a plasterboard joint, and what foundation measurement is still missing?
It is a weak match for a plasterboard joint because a joint crack follows the joint, and these cracks radiate from the ceiling rose instead. They do not run along a board edge. The survey has recorded that pattern. It has not called it proof of foundation movement, and the foundation measurement is still missing: nobody has levelled, monitored or measured the foundations. A crack diagram is not that measurement. The pattern argues against a simple board joint. It does not, on its own, measure the ground.
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?
Plasterboard is fixed to timber, and cracks that are only the joint often track the sheet edge in a straight line. Cracks leaving a rose in several directions are a poor fit for that explanation. They may be in old plaster, they may be movement in the ceiling, or they may be something in the structure below. The survey can say the match to a board joint is weak. It cannot say how much a foundation has dropped, because it took no such measurement.
Ask the surveyor to keep the description as a radiating pattern, not as a finished diagnosis. If the cause needs to be narrowed, a structural specialist can say whether monitoring or opening-up is warranted. Tell the solicitor no foundation measurement was taken. Do not describe the house as subsiding because the rose has cracks. The report has not measured the foundations, and it has not matched the cracks to a plasterboard joint.
What should you ask your surveyor?
- Do the cracks radiate from the rose rather than follow a board joint?
- Why is that a weak match for a plasterboard joint crack?
- What foundation measurement, if any, was taken?
What are the typical next steps?
- Describe the cracks as radiating, not as a board joint.
- Do not treat the pattern as a measured foundation movement.
- Ask a structural specialist if the cause needs opening-up or monitoring.
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 ceiling was skimmed recently, do the cracks not count?
Recent skim explains a surface, not the path of the cracks. They still do not follow a board joint, which is why the plasterboard explanation is a weak match. No foundation measurement was taken either. Decoration does not supply that measurement.
Can you level the floors yourself and call it the missing measurement?
A casual look with a ball is not the measurement the report lacks. The survey has not measured the foundations. If levels are needed, ask a specialist to take them and to say what they mean. Do not paste a homemade figure into the survey.