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Wind underneath bathtub between first and second floor ceilings

Postby Harvey119 » Tue May 04, 2021 10:32 am

Hi, moved into new house late last year and have noticed that whenever it's really windy, there will be a lot of wind in between the ceiling of first floor and floor of second floor.

Thought the house was built in late 90s, but now think it was the 80s.

This presents itself as wind coming under the bath through the hole they have made in the floor under the bath, making a strong breeze come from under the bath and making the bath panel move and make noises.

No idea where the wind could be coming from and would appreciate help to locate it.

I have already had a ladder out and filled in a couple of small holes around the air pipe, but now can't find any other holes anywhere!

Have included a picture of under the bath where the wind is, the back of the house which shows the air pipe and is also where the side of the bathroom is that has the hole where the wind comes from and also a side picture. Many thanks
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Harvey119
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Postby stoneyboy » Wed May 05, 2021 9:00 pm

Hi harvey119
Your home has cavity walls and I would assume they are not fully filled so there will be a lot of air movement in the cavity. You first floor joists will have been built into the inner skin and will have shrunk so there will be gaps into the ventilated cavity, this will lead to the space between the ceiling and first floor joists also being ventilated. There is no easy/cheap solution to this - filling the cavity is possibly the best option.
Regards S
stoneyboy
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