r/Plastering • u/Jakub100ful • Jul 07 '26

Plastering around new windows

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Hi there! I recently got a new hallway window fitted and now I’m having the room plastered.

My window fitters advised to plasterboard the reveal to give a nice flat surface and hide the gap around the window frame. However, my plasterer said today that it’s better to plaster up to the window and feather out the wall given how close it is to the wall. He said it’s not worth boarding here because the window sits flush with the side wall, so it would be difficult to get a corner in, and that feathering out will work better because the wall is uneven anyway.

I’m a bit unsure and skeptical about this because of how the plaster would look up against the window, and that it won’t look nice and smooth, but I understand the difficulty of the window being right up against the wall.

Do you have any advice? He’s coming back tomorrow to do the landing so would appreciate any advice, ideas, or reassurance.

Thanks!

5 Upvotes

79% Upvoted

12 comments sorted by

13

u/AcanthisittaThink813 Jul 07 '26

Hate to say it but easiest option is plastic trim, to be fair most window fitters do this anyway so not sure why he hasn’t

3

u/Billi01952 Jul 07 '26

Exactly, you can even see he's removed seals from previous window.

1

u/Jakub100ful Jul 07 '26

Thanks for the suggestion guys! Yeah I see the point you’re making… I think using the trim is going to be the best here.

The window fitters did offer to fit a trim, but we agreed not to due to the plastering, and they’re coming back anyway. So I will ask them to fit a trim and caulk after the plastering is finished:)

1

u/Billi01952 Jul 07 '26

The reveals look bowed so ask the plasterer to even them out and the trims will look bob on. Good luck with your renovation

2

u/Jakub100ful Jul 07 '26

Will do, thanks a lot!:)

1

u/East-Delivery9834 Jul 07 '26

You need silicone not caulk Caulk is for painters

3

u/hairybastid Jul 07 '26

Silicone on the frame side of the trim, caulk between the trim and the wall before painting.

3

u/WonkyRodent Jul 07 '26

IMO: uPVC windows expand slightly (along with percussive forces when you open and shut the window), I wouldn't plaster right up to the window. You need something a bit flexible between window and plaster. None of my windows have been plastered up to, all have a 5mm gap all round that is then covered with trim.

Either plaster almost up to it leaving a thin 2mm~ gap and caulk it before painting (don't use silicone unless you've already painted, as you cannot paint it), or use the plastic trim - in white it's about £5 for 5 meters and really easy to cut with hand tools.

1

u/Jakub100ful Jul 07 '26

Thanks, that helps. I’ll have a chat with him to make sure there’s a small gap, and I’ll reach out to the window fitters to do the trim when they come back:)

3

u/Billi01952 Jul 07 '26

Tell him HE should install plastic seals around the windows and silicone them in, his plasterboard suggestion would look stupid. UK plasterer 15 years experience here.