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Yeah. They weren't capable of cutting the PIR board to fit in between the rafters with a pressure fit so bought a bunch of woodscrews.
Unbelievably it has been signed off by the building control inspector (I think "presents" in manilla envelopes may have been involved). But the upstairs will be freezing in winter and boiling hot in the summer. I realised when I was there today that you can actually hear the insulation rattling about when there is a breeze from the right direction🤦.
If you can't get your hand in a gap, it's a pro finish right?
Just realised you said ROOF battens. What the actual fuck.