Oops! Small double glazed window surround crumbled

twopenny

So cleaning off old paint and layer of dirty sealant some sealant came out hard then the plaster crumbling.
I'd noticed the emulsion had crackling.

So what sort of plaster would go on the gap at the side before I use new sealant please?
And how do i get it in a small space between frame and trim?
Just shove in with a small pallet knife?

The rest seems solid. Should I take the lot out or just deal with the smaller problem. I think it's just a case of cosmetics, not structural.

jonnydeppiwish!

Have you got a pic? Makes it easier to visualise

FreeBear

White(ish) crumbling plaster would be lime. Paint the exposed edges with some dilute PVA or SBR to stabilise any loose stuff. For a small area, just use a filler like Easyfill. If it is a larger area, Knauf Fill & Finish. Which ever you use, build up the thickness in thin layers.

twopenny

OK it's not brilliant but the best I could do at this time of day.

Seems to be a frame set in the wall and the diagonal trim over

There is plastic at the back of the gap set into the wall. Filled then siliconed over to make it compatible with the whole.

I stand to be corrected as I have no idea how these windows are set.

Brick wall and dry wall.

I have fine filler (basic), general filler as in Bartone cheap? Or do I need something special?

Is it just Frame Sealant over? I have some of that.

Muchas gracias.

FreeBear

I'd get a cartridge of filler - e.g. https://www.screwfix.com/p/geocel-painters-mate-flexible-acrylic-filler-white-310ml/35403 (or a tube from Poundland for £1.50). Pump a bead in to the gap, and give it a wipe with a damp sponge or cloth.

stuart45

Is the plastic trim there to close the cavity?

twopenny

Sounds good to me    
I get the impression that if I used filler again it would dry out again - eventually. Between 2 bits of plastic and sealed.

Seems not to be too vital having looked again. But I know nothing about the installation of windows between brick and plasterboard. I'm guessing there's a gap somewhere but can't see one.

It's not exposed to any extremes as it's a warm en suit sheltered by me and a neighbour.

jonnydeppiwish!

I’d take out as much as possible then fill with either a flexible caulk or even white bathroom silicone.

twopenny

Stuart, I missed that.
I can't see a cavity. I don't think it is. At least it could be close but ......
The property was left unused and unheated for some 15yrs. I'm finding all sorts of things you couldn't predict as a result.
Otherwise essentially a new build left to sit.

moneysaver1978

twopenny said:

OK it's not brilliant but the best I could do at this time of day.

Seems to be a frame set in the wall and the diagonal trim over

There is plastic at the back of the gap set into the wall. Filled then siliconed over to make it compatible with the whole.

I stand to be corrected as I have no idea how these windows are set.

Brick wall and dry wall.

I have fine filler (basic), general filler as in Bartone cheap? Or do I need something special?

Is it just Frame Sealant over? I have some of that.

Muchas gracias.

IMHO the gap seems a bit too large for a silicon (according to the 1st photo), should these be filled in first?

ThisIsWeird

That's a decorator's caulk type jobbie, as FreeBear outlined. Squeeze it right in there, and wipe with a damp cloth, or pretty much any tool, to get a neat finish. It may shrink as it dries, so just add another layer if it does.
It will be paintable, unlike silicone.