How do I retro-fit insulation correctly before plasterboard?

[WhiteWoolf]

Hi there, we have a raked ceiling in a small living room. The old plasterboard has failed due to water damage and a bad paint job a few years back. As there is no insulation between the ceiling and tiled roof, we have decided to retrofit insulation and new plasterboard over the top. We have installed the wall track and furring channel 90mm down from the existing ceiling as we wanted to retain as much of the exposed beams as possible. We have Bradford sound break insulation R2.5 which is 88mm thick. I've just realised that tucking the insulation behind the furring channel will create quite a gap between the insulation and new plasterboard. Should we run the insulation the other way between the furring channel and use some strapping to hold in place so the insulation is a tight fit between the plasterboard? What should we fix the strapping to? Thank you

[JacobZ]

Hi @WhiteWoolf,

Yes, what you've described is exactly what I'd suggest. Glue the flat bar to the VJ board using Liquid Nails with a 1-2mm gap which can be filled with No More Gaps. You can then paint the flat bar so it ties in well with the VJ board.

I'm no style guru, but I think timber moulding would look good for both the ridge beam and the wall connections. Quad is a simple, relatively low-profile option, but I'm not sure I'd call it modern. 

Have a look through Porta Moulding's General Purpose Mouldings and their Decorative Ceiling & Wall Mouldings. There might be something in there that piques your interest and suits the style you are looking to achieve. 

Let me know what you think.

Jacob