Kingspan Kooltherm K17 - Any experience?

[tnarg999]

I have a related thread in another Forum section, but need to ask a more specific question here.

I have taken down a (tiled) plasterboard wall in a bathroom that was dot/dabbed onto an external wall (two leaf cavity, inner wall medium/lightweight blocks - the ones you can saw through) Cavity retro filled with rockwool a couple of years back.

I don't have enough space in this bathroom to stud the exterior wall and insulate before plasterboarding, but I wanted to do something rather than just re- dot/dab 12.5mm plasterboard. I came across Kingspan K17 Kooltherm, which is a 12.5mm plasterboard bonded directly to rigid insulation. The insulation backer comes in various sizes and the whole board can be dot/dabbed to blockwork.

Does anyone have experience of this product? I was going to go for the lowest thickness (space) of 20mm insulation bonded to 12.5mm plasterboard.

The decor will be tiles @ 16k kg sq M in weight.

If anyone can offer alternatives i'd be grateful.
Thanks

 

[sherburn]

I'm only an inexperienced DIYer so not really qualified to give out advice, but I recently used a similar product, Gyproc ThermaLine plus, on a couple of small walls where studwork wasn't practical. I was dubious about only fixing with adhesive though, probably wasn't necessary but I ended up fixing with a few screws as well as adhesive just to be sure the plasterboard wouldn't come away from the insulation. All plastered and ready to decorate now, so far so good- the room feels cosier already.

I think I was definitely being a bit overcautious by fixing with screws, but with tiles on I'd be wanting to mechanically fix it if possible. I'm sure someone with a lot more knowledge than me will come on and say I'm talking rubbish though and that you'll be fine to just dot and dab.