Damp appearing on exterior wall behind toilet fixture
Drainage and wastage systems and plumbing help, advice and answers

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Gray_notts
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Damp appearing on exterior wall behind toilet fixture

by Gray_notts » Tue Jan 18, 2022 12:46 pm

Hi,
A damp area has appeared on an exterior wall directly behind a toilet fixture. No damp on the interior wall or toilet.
Please see image. Could it be a leak on the waste from the toilet? Or a leak on the mains pipe on the toilet file?
Grateful for any help.
thanks
Attachments
damp.GIF

stoneyboy
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Re: Damp appearing on exterior wall behind toilet fixture

by stoneyboy » Thu Jan 20, 2022 9:41 pm

Hi gray_notts,
Since you have cavity walls it is unlikely that the inside skin will be dry and the outer damp. Is there another overflow at a higher level directly above the damp patch?
Regards S

Gray_notts
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Re: Damp appearing on exterior wall behind toilet fixture

by Gray_notts » Fri Jan 21, 2022 8:11 am

Hi,
No, no other overflow or water source above above this spot.
It's roughly inline with the toilet waste pipe so may it is a leak there when toilet is flushed? We've stopped using it to see if damp recides.
thanks

LorraimeGee
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Re: Damp appearing on exterior wall behind toilet fixture

by LorraimeGee » Sat Oct 07, 2023 6:20 am

Hi.
Just seen your post as i was looking for an answer to the exact same problem!

Would you mind letting me know if you found the source of your damp wall please?

Thank you.

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