Chimneys and parapets
Rain reaches the fireplace and the pot has no cowl. What weather path is the open pot, and what flue liner was not seen?
The open pot is a weather path straight down the flue to the fireplace. With no cowl, rain can fall into the pot and arrive in the room, which is what is happening. The flue liner was not seen. The survey has recorded rain at the fireplace and an uncrowned pot. It has not looked up the flue, and it has not confirmed whether a liner is present, broken, or absent. A missing cowl is a cover that was not there. It is not proof of the liner's condition. The rain path is the open pot. The liner remains unseen.
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?
An open pot is a hole at the top of the stack. Rain that enters it runs down the flue and can show in the fireplace even when the roof covering is sound. A cowl or a cap is what keeps that weather out while still letting the flue breathe if it is in use. The liner, if one was installed, sits inside the flue and is not visible from the hearth or from the ground. The survey did not camera the flue.
Ask a chimney specialist to inspect the flue and say whether a liner is present, and ask a roofer about a cowl on the open pot. Those are two jobs. Tell the solicitor rain is reaching the fireplace because the pot has no cowl, and that the liner was not seen. Do not light a fire to see what happens. The survey has not certified the flue for use. Stopping the rain path is the pot. Knowing the liner needs a look this inspection did not make.
What should you ask your surveyor?
- Is the open pot the path bringing rain to the fireplace?
- Was the flue liner unseen from the hearth and from the ground?
- Has the flue been left untested?
What are the typical next steps?
- Treat the uncrowned pot as the rain path into the fireplace.
- Ask a flue specialist whether a liner is there.
- Do not use the fireplace on the strength of this survey.
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 chimney breast is dry, has the rain stopped?
Not necessarily. Rain reaching the fireplace can wet the hearth without staining the breast. The open pot is still the weather path, and the liner was still not seen. A dry breast on the day does not supply a cowl that is not there. The survey has not tested the flue. The path remains the pot with no cover.
Does fitting a cowl mean the flue is safe to use?
No. A cowl deals with the open pot as a rain path. It does not show the liner, which the survey did not see, and it does not certify the flue. Use of the fireplace is a separate question for a chimney specialist. The survey recorded rain and an uncrowned pot. It did not pass the flue for a fire.