Basements and cellars
An old coal chute still passes through the basement wall and the cover is loose. What rain path is that opening?
The loose cover is a rain path through the basement wall along the old coal chute. Water that lands on that opening can run down the chute and into the cellar instead of staying outside. The survey records an opening that still passes through the wall and a cover that does not sit tight. It has not measured how much rain gets in, and it has not decided that every damp mark in the basement comes from this hole. The path named is the chute itself.
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?
Coal chutes were built as a slot from pavement or garden through the wall into a cellar bunker. When the cover is loose, cracked or missing its seal, rain has the same slot. The water does not need a failed damp-proof course. It uses the opening the house already has. The survey can see the cover and the hole. It cannot, without a storm, measure the flow, and it should not spread this path onto damp marks that have no link to the chute.
A builder can reseat or replace the cover and say whether the chute should be sealed up. That is a repair to an opening, not a tanking scheme invented from one loose lid. Tell the solicitor there is an external opening into the basement that is not weathertight. If a seller says the chute was blocked off, ask where, because the survey still found a loose cover and an open path.
What should you ask your surveyor?
- How loose was the coal-chute cover, and where does the chute enter?
- Did you see rain staining inside the chute, or only the opening?
- Which basement damp marks have you not tied to this hole?
What are the typical next steps?
- Describe the loose chute cover as a rain path through the wall.
- Do not attribute every basement mark to the chute.
- Get the cover reseated or the chute properly closed off.
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 cover is only slightly proud, is rain still the path?
A cover that does not sit tight still leaves a gap into a hole through the wall. Slight movement is enough to describe the path. The survey has not measured leakage, but it also has not found a sealed opening. The route remains the chute.
Does the chute raise a security point as well as a damp one?
Yes, as a separate observation. An opening through the basement wall with a loose cover is a way in, not only a way for rain. The survey has not tested locks or alarms. The damp path and the open route are both visible facts, and neither has been measured.