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I was wondering if he means we need to take down the plasterboard, put in the pir board with taped seams and then put the plasterboard back up over top?

This is more info receive if it makes more sense. Thanks. Please see attached calculation – with 175mm of mineral fibre between the joists they will need an additional 15mm PIR board under joists and additional boards to meet fire regs. One thing I did forget to mention is they must tape the...

Hello, I’m new to the group so please be gentle. Had a builder in recently to do a bedroom extension above existing garage. All done well, however when building control gave visited he has said the insulation layer between garage roof and new bedroom floor is not thick enough. He has said this...