pir insulation

Hello new regs states 150mm insulation on walls which are external...... normally when it used to be 50mm pir, I would use a 50mm timbers and cut off pir insulation in between... Now it is 150mm, how do we put this on the wall? Can't exactly stick them on... Thanks

Hello My garage floor already is already concrete. I want to put 100mm PIR Insulation and was told to put 50mm screed on top. I need to put a bit more, as in 100mm screed. is this ok or will it be too heavy? Or can i put 150mm pir insulaton and then 50mm screed? Suggest i put on concrete...

I am curios if this is doable or would work. I have a small single skin block shed. Now I am wondering if you can use foam tile backer board like Q Board dot and dabbed to the wall as both the vapor barrier, insulation and paneling without using plasterboard? This panel is meant for wet rooms...