Chimneys and parapets
The only weathering at a chimney is a cement fillet and no lead was seen. What metal detail is absent?
The metal detail that is absent is lead flashing at the chimney, or any other proper metal weathering. The only weathering seen is a cement fillet, mortar worked into the angle between stack and roof. No lead was seen: no apron, no soakers, and no stepped flashing cut into the joints. Cement can crack and leave the junction open. The survey has recorded a fillet and the absence of lead. It has not said the fillet is already leaking, and it has not fitted metal. The missing detail is the metal the fillet is standing in for.
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?
Chimney junctions are usually weathered with metal let into the brick joints and dressed over the tiles, so a little movement does not open a gap. A cement fillet is rigid. When the roof or the stack shifts, the fillet can crack, and there is no lead behind it if none was seen. The surveyor looked for that metal and did not find it. They did not cut the cement out, so a buried flashing was not exposed either. The weathering on view is cement alone.
Ask a roofer to form proper metal soakers and flashings, or to confirm whether any metal is hidden by opening the joint. Tell the solicitor the only weathering seen was cement and no lead was seen. The survey has not specified a product and has not said every chimney on the house is the same. This stack's junction is the one without the metal detail. A coating on the fillet would not supply the missing metal.
What should you ask your surveyor?
- Is the only weathering a cement fillet, with no lead seen?
- Which metal detail was absent: apron, soakers, or steps?
- Was the fillet left in place, so nothing buried was exposed?
What are the typical next steps?
- Treat lead flashing as absent at this chimney.
- Ask a roofer to weather the junction in metal, not in cement alone.
- Do not count a cement fillet as a lead detail.
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 loft is dry, is the cement fillet enough?
A dry loft does not put lead where none was seen. The only weathering is a cement fillet, so the metal detail is still absent. Dry timber on the day can follow a dry spell. The survey has not called the fillet a lead flashing. It recorded cement and no metal. The junction still lacks that detail.
Does cement on this chimney mean the others lack lead too?
Not from this note. The finding is this chimney, where the only weathering is a cement fillet and no lead was seen. Other stacks were not given that description. The missing metal detail is at the chimney the survey wrote about. Do not strip flashings that were not reported as absent.