Vent causing damp where wall and ceiling meet?
Damp can be a major issue in the home. Find answers to questions or post your own here.

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PhreeDIY
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Vent causing damp where wall and ceiling meet?

by PhreeDIY » Fri Nov 04, 2022 12:53 pm

Hi,

Im getting wet on an inside wall, where the wall and ceiling meet. Outside is an airbrick which is half covered by the soffit. The gutter just next to this area is a joint. My guttering is the deeper type and nextdoor s is the shallow type, the joint leaks in rain. See picture attached.
Ive a feeling the rain is running off the soffit and into the cavity via the airbrick and bridging somehow, does this sound feesable?
Does anyone have any advise on how to address this? Remove the airbrick and move it somewhere else? Any advice gratefully received.
Kind regards
P.
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Airbrick
Airbrick

stoneyboy
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Re: Vent causing damp where wall and ceiling meet?

by stoneyboy » Sat Nov 05, 2022 9:43 pm

Hi phreediy,
It's very unlikely that the damp is coming from the gutter joint, any leak here will run down the facia and off the return lip.
You need to look for causes of condensation, is the room a bedroom? Does the loft ventilate through the top half of the air brick - is your loft cross ventilated?
Regards S

PhreeDIY
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Re: Vent causing damp where wall and ceiling meet?

by PhreeDIY » Fri Dec 09, 2022 10:08 am

Hi Stoneyboy, thanks for your response and apologies forbthe delay in responding, radiotherapy can take over your life.

So not sure if the loft vents through the top half. Its a bedroom and the ceiling curves down in there and in the attic making it difficult to see whats happening in the void.
The last few mornings the wall above the picture rail that curves from the ceiling has been running with water, so assuming this is a buildup of condensation, but am at a loss how id go about resolving it. Ive tried leaving the heating on overnight, turning it off etc. I cannt actually get into the void from the attic, the space is just too tight.

Any idead gratefully received.

stoneyboy
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Re: Vent causing damp where wall and ceiling meet?

by stoneyboy » Sat Dec 10, 2022 11:27 pm

Hi phreediy,
There is no easy solution to this problem and you will probably need to gradually make changes and see if the issue is resolved after each one.
It's doubtful that you need a vent in the bedroom unless you do not have a window, so you could remove the innner part of the vent and fill with an aerated block. It will need to be something like this to increase insulation.
If this does not improve things there's a good chance that the condensation is from the loft area so you will need to check for cross ventilation.
Regards S

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