Roofs and flat roofs
One pair of rafters has no collar where the neighbouring pairs do. Does that missing collar rate the whole roof structure?
No missing collar on one rafter pair rates the whole roof structure. The pairs on either side still have collars, so the note is a bare bay rather than a failed frame. A visual survey records that this collar is absent and that the neighbours are present. It does not design a new tie, and it does not calculate the load those two rafters now put on the ceiling or the walls. Price any work against that pair, not against a wholesale rebuild of the roof.
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 collar is the horizontal timber that ties a rafter pair, usually high in the slope, so the feet are less free to push outward. One pair without it, beside pairs that still have collars, is an absence in a single bay. The visit did not measure that thrust or open the ceiling to chase a crack. It records what could be seen of that bay from the loft.
A carpenter can look at that bay and say whether a collar should go back, and of what size and fixing. That opinion is a later instruction. It is not a design already hidden in the survey, and it is not a reason to strip both slopes. Keep photographs of the bare pair and of the collars next to it so any quotation names the same bay.
What should you ask your surveyor?
- Which rafter pair has no collar, and do the pairs beside it still have theirs?
- Could you see the rafter feet in that bay, or only the line where the collar should sit?
- Are you recording one absence, or rating the roof frame as a whole?
What are the typical next steps?
- Photograph the bare pair and the collars on the neighbouring pairs.
- Ask a carpenter to comment on that bay before any whole-roof price is accepted.
- Keep the note tied to the missing collar, not to a re-cover of the slopes.
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 one missing collar prove the roof is spreading?
No. Spread is a separate pattern at the eaves and the ceilings. One bare pair is a local gap, and it does not prove the walls have been pushed outward.
Should the other collars be replaced because this one is gone?
No. The neighbouring pairs still have collars. Do not let a quotation turn one absence into new ties across every bay of the roof.