DIY Doctor

What is causing this?

Postby Ashers » Sat Oct 24, 2020 5:12 pm

Hello,

Any thoughts on what could be causing black mold to appear around the edges of this window?

This started last winter and stopped over the summer but has started appearing again this month.

New window 2 years ago when we moved in.

Could this be related to the window being installed poorly?

We have the window open when we cook.

.
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Ashers
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Postby stoneyboy » Sun Oct 25, 2020 10:00 pm

Hi ashers
The problem is because the frame of the new window is narrower than the original. The inside edge of the outside brickwork is therefore inside which gives a cold bridge.
The only solution is to have a narrow upvc trim fitted around the inside of the window.
Regards S
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Postby Ashers » Sun Oct 25, 2020 11:30 pm

Shouldn’t they have picked that up when installing the window?
Ashers
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Postby Ashers » Sun Oct 25, 2020 11:30 pm

Shouldn’t they have picked that up when installing the window?
Ashers
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Postby stoneyboy » Mon Oct 26, 2020 10:23 pm

Hi ashers
Sadly it’s a very common problem which many installers overcome by fitting the internal trims, this is also an easy way of concealing damaged plaster.
Regards S
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Rank: Project Manager
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