MartC

I've come to realise that our 2001 vintage house is a little bit of a plasterboard tent, and I I have a hundred questions to ask about trying to improve it, but I will start with one. My immediate question is about insulating window reveals. We have a few replacement windows on order, to replace some failed ones, and the thermal camera shows many reveals are cold. Can I just ask the window installers to fill any gaps behind reveals with foam or insulation when they remove the old windows, or is there any reason I should not do that, if they agree? Foam would be more airtight but might bulge plasterboard, and rockwool might be less effective. I know it'd be better to rebuild them from inside, but that's probably beyond my DIY skills and I'd need to get someone in to do that, so it'd not an immediate prospect. Thank you!