Asbestos in pre-2000 homes
A flue pipe in the loft looks like asbestos cement and it was not disturbed. What has the survey told you not to do with that pipe?
Leave that flue pipe undisturbed. The survey has told you, by recording an asbestos-cement-like flue in the loft that was not disturbed, that the pipe was seen and not tested. It has not told you to sand it, cut it, or break it open to see what is inside. Buildings built or refurbished before 2000 can contain asbestos, and cement flues are one of the products that look can only suggest. A home survey does not sample by looking. The finding is an undisturbed pipe that might be asbestos cement, not a clearance and not a removal instruction.
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 flue pipe in a loft is often left because it is still doing a job, or because nobody has yet decided to replace the appliance. The survey can describe the colour, the joints and the fact it was not opened. That description is not an identification of fibres. If the pipe is intact and you are not replacing the appliance, the useful action is to leave it in place and keep people from knocking it. Disturbing it to satisfy curiosity is the opposite of what the note supports.
If the boiler or the fire is being replaced, the person who disconnects the flue needs to know the survey only suspected asbestos cement and did not sample it. Removal, if it is required, is their method and their waste route, not a job the home survey has specified. Do not ask the surveyor to reword the note into a pass because the pipe looked sound. Soundness on the day is not an analysis. Keep the loft pipe on the list of things not to be casually cut.
What should you ask your surveyor?
- Where in the loft is the flue pipe, and was any of it opened?
- Did you record a suspicion of asbestos cement rather than a sample result?
- What should stay undisturbed until an appliance is actually replaced?
What are the typical next steps?
- Leave the loft flue pipe undisturbed.
- Tell any heating fitter the pipe was noted and not sampled.
- Do not treat a sound-looking pipe as a clearance.
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 pipe is lagged, has the lagging been sampled either?
No. Lagging on or near the flue was not a sample just because the pipe was seen. Say what covering was visible, and keep both the pipe and any wrapping as untested until someone whose work is asbestos identifies them.
Does a disused flue change the advice to leave it alone?
A disused flue is still a pipe in the loft. Being out of use does not identify it and does not make breakage harmless. Leave it undisturbed unless a planned removal is being done by someone who has been told it was not sampled.