MrGreen

Te gap behind is necessary for airflow so not too worried about that. 👍

So, this is an old chapel conversion that we are doing. Slate roof over Sarking boards.we left a 50mm air gap then what you are seeing is 100mm of PIR. Once that’s all (correctly🙏) fitted, there will be a layer of 50mm PIR-backed plasterboard going on top.

Will do. Cheers Nick.

Thanks for that Nick, I feel a bit reassured. I’ll be making sure that the foam infill is perfect and done with the correct product. 👍

We’ve been really happy with the work our contractor has undertaken so far, and great bunch of lads etc but we took a look at the insulation they’ve started installing in the roof today and…I dunno… is this bad? The intention is that there will be 50mm PIR backed plasterboard going over the top of this so all these badly fitting parts won’t be visible but I’m worried it will affect the thermal performance. Any thoughts?