Peeling plaster kitchen window

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12 Dec 2013
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Guernsey
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United Kingdom
I have a problem with the plaster and decor around the kitchen window in a second floor apartment. It's double skin block and about 25 years old. It's not especially damp but then we have had a lot of dry weather recently.

Photos show just after I have peeled off all the worst of the plaster. Before this there was plaster peeling around the window sill with salt deposits and some black mould.
Most of the plaster came off in large pieces. I'm keen to get to the source of the the problem.
There is loose plaster around the top of the window frame. Perhaps the window frame is poorly sealed and needs re-installing or something else?
 

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So it looks like the dampness is coming in from above and probably around the cill at the base of the french doors above.

It also looks like there is no cavity tray above your window. This stops water running down between the walls and on to your window lintel above your window.

If you had a cavity tray it water in the wall would be diverted out of the wall via weep holes.

you’ll need to seal around the upstairs doors with a mastic. Try that first.

If you’re a leaseholder then you should contact the maintenance management company to fix.

worst case you may have to get a cavity tray fitted in the wall.

you might be able to claim with your buildings insurance for the damage inside. Give them a call.
 
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