Age and type of house
What should you ask if water is sitting on the flat roof of a Victorian closet wing?
Ask about that small roof, not the main slope. A rear closet wing is the projection at the back, often a former scullery or water closet, and ponding is water sitting on its own flat covering, separate from the pitched roof. The survey should say what it could see of the outlets and of the ceiling underneath.
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?
Buyers fold every roof note into one sentence about the slates. This wing does not work like that. Its flat covering, its upstand against the back wall and its outlet are a small roof with its own ways of holding water. A home survey sees what is visible from a safe place. It does not take the covering off, and it does not prove the deck is sound because the felt in the middle looked even on a dry day.
Water that sits there can stain the ceiling of the wing without any defect in the main tiles. Ask which ceiling was looked at, and whether the outlet was blocked, missing or simply not seen. Do not replace the main roof because this wing holds a puddle, and do not ignore the puddle because the ridge of the house looks straight. The two coverings need their own lines.
What should you ask your surveyor?
- Did you see this flat roof from above, from a window, or only the ceiling under it?
- Was an outlet visible, and was water actually sitting there on the day?
- Is the main pitched roof a separate comment from this wing?
What are the typical next steps?
- Keep the closet-wing covering separate when you talk to a roofer.
- Photograph the outlet and the ceiling stain before anyone clears the roof.
- Do not treat a dry day on the main slates as a pass for this flat roof.
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
Is ponding on its own proof the covering has failed?
No. It shows water is sitting. The survey should still describe the covering, the edges and the ceiling, and say what it could not see.
Does this replace the note about the rear addition as a whole?
No. The wing can need its own description for other reasons. This question is only about water on its flat roof.