Asbestos in pre-2000 homes
The cladding on a BISF house includes a cement sheet and it was not sampled. Why must the survey not call that sheet safe or unsafe?
The survey must not call that cement sheet safe or unsafe because it was not sampled. Looking at a cladding sheet does not identify asbestos and does not clear it. Buildings built or refurbished before 2000 can contain asbestos, and BISF cladding is a known place a cement sheet can sit. The survey has seen a cement sheet on the house. It has not taken a sample, tested a fibre, or decided what the sheet contains. A visual note is not a verdict either way.
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 home survey records materials it can see. It does not analyse them. Asbestos cement can look like other fibre-cement sheets, including sheets made after asbestos cements were no longer the usual product, and the difference is not settled by colour, age of the paint, or a firm tap. The sheet on this BISF house was left in place and unsampled. Calling it safe would invent a clearance. Calling it unsafe would invent a laboratory result the visit did not produce.
Leave the sheet undisturbed. Do not sand it, drill it, scrape it or break it to settle your own mind. Ask the solicitor whether any asbestos survey or earlier sample exists for this cladding. If someone needs to know the content before works, that is a sampling visit by a competent person, not a sentence this report can now be stretched to give. The home survey has not classified the sheet.
What should you ask your surveyor?
- Which cement sheet did you see on the BISF cladding, and from where?
- Did you take any sample, or is the sheet untested?
- What wording should be read as a visual note rather than a safety verdict?
What are the typical next steps?
- Read the sheet as unidentified, not as safe and not as unsafe.
- Ask the solicitor whether any earlier asbestos sample exists for this cladding.
- Do not sand, drill, scrape or break the sheet.
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 sheet is painted and intact, has the survey cleared it?
No. Paint and an intact face still leave the content unknown. The survey did not sample the sheet, so it cannot call the material safe because it looks whole, and it cannot call it unsafe because it is old. An intact surface is a reason not to disturb it, not a test result.
Does the BISF name by itself prove this sheet contains asbestos?
No. The BISF name explains why a cement sheet on the frame deserves caution, and older houses can contain asbestos. The name is not a laboratory result for this particular sheet. The survey saw the sheet and did not sample it, so the content of this sheet remains undecided.