Drafty gap round window - how to fix it?

Soldato
Joined
17 Jan 2006
Posts
4,313
Hi All

Taking a slight break from the Lounge transformation as we haven't got babysitters for a little while, so we're concentrating on doing a few other jobs around the house.

One we want to tackle is the landing window. Having put up a sprung-loaded net curtain pole, we discovered that the half inch or so from the inside frame of the window has nothing more than a thin layer of plaster over it.

We discovered this as the fairly gentle pressure of the pole pushed a hole in the plaster. A further bit of gentle pushing enlarged the hole easily. This hole was letting in quite a draft so we've temporarily block it up with tissue:

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We then found that the trim at the bottom was barely fixed in place and a little bit of effort removed it completely. Underneath it was a thin layer of mortar (?) again quite a draft was coming through.

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A little bit of pressure and the mortar gave way to reveal there was also a gap underneath this too.

Excuse the terrible photo but this sort of shows the mortar pushed down into the gap.

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I'd obviously like to sort this out as it looks a mess and is very drafty. I was thinking of chipping away the mortar/plaster all around the window so I can see exactly what the gap is looking like, then filling it with something, refitting the trim and then sealing with acrylic sealant.

Is this the best way of doing this? if so, what would be the best thing to use to fill the gap? I was wondering about expanding foam but it's not a huge gap so that'll probably be overkill.

Any thoughts very much appreciated.
 
That's exactly what I was thinking! :)

I did wonder if I could use normal filler as I have quite a bit left over from decorating the lounge, save me spending out on expanding foam...
 
That looks like the perfect product as I was rather worried about expanding foam going everywhere having never used it before! :)

Would it be advisable to remove the plaster down the sides too as I don't definitely know how much gap there is and I don't really want to end up leaving an air pocket if I don't get foam in everywhere to fill it?

I'm thinking fill the gap with the foam, then filler to get a nice level finish for the trim to go over. Stick the trim with no nails or something similar. Then seal it all up with nice white acrylic...
 
That's good thinking there!!

Small holes it is then, also minimises the amount of filler I'll need to use.

I'll probably remove all the mortar at the bottom as it's just crumbling away anyway, should give me a chance to get a feel for how the foam works before I start on the sides and top...

Good point re the trim, don't want to end up meltng it! lol
 
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