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Windowsill Repair With Bubbling Paint

Postby smatt » Fri Jul 15, 2022 8:24 am

Hi All,

I don't know if this is the right forum for this, but I'm after a bit of advise and I think it would probably fall under decorating.

Very recently, within the last few days, I noticed that the paint was bubbling up underneath the inside windowsill of one of my rooms. I assumed this was due to the heat, and that underneath would just be the wood of the windowsill.

When I scratched the paint, I found there to be some kind of insulation underneath.

I suppose my question is really what is going on here, since I wasn't expecting the insulation to be underneath that paint. Is it likely that the insulation is running under the window and what would be the best course of action to get it fixed?

Many thanks in advance!

M
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Windowsill 2
ws1.JPG
Windowsill 1
smatt
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Gorilla Glue heavy duty grab adhesive

Postby stoneyboy » Sat Jul 16, 2022 9:05 pm

Hi smatt,
It looks like you have mdf sills and damp has got in them causing the mdf to expand and delaminate. Rub it down, fill it and then repaint. If the problem re occurs a replacement sill might be needed.
Regards S
stoneyboy
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