Plasterboarding over PIR insulation

[antsals]

I'm after some advice, I have a job that I need to fix plasterboard over PIR insulation boards.....can i stick plasterboard directly onto the surface of the PIR insulation (celotex) board?

I then have another instance that the board needs to stand off insulation 10 / 20mm but on a taper as the timbers around the window are not square....can I again use some foam fix of something to fix the boards directly to the insulation without battoning and screwing?

Cheers,
Ant

 

[John D v2.0]

No, you can't fix anything to pir board, fixings would have to go right through. Pir is only specified for compression load in terms of structural properties