Jammy5 Posted 8 hours ago Author Posted 8 hours ago The SAP calc is asking for 63mm insulated plasterboard between garage and dwelling walls. Then for the ceiling it's 200mm R40 between joists and under drawn with 63mm insulated plasterboard and a layer of fire line board.
ETC Posted 8 hours ago Posted 8 hours ago 24 minutes ago, Jammy5 said: The SAP calc is asking for 63mm insulated plasterboard between garage and dwelling walls. Then for the ceiling it's 200mm R40 between joists and under drawn with 63mm insulated plasterboard and a layer of fire line board. I’m surprised that your BCO will allow you to put insulated PB to the underside of a FR floor.
Nickfromwales Posted 8 hours ago Posted 8 hours ago 28 minutes ago, ETC said: I’m surprised that your BCO will allow you to put insulated PB to the underside of a FR floor. If it's 9mm PB then yes, but if it's 12.5mm with plaster skim coat then the 30 mins regs are satisfied?
ETC Posted 6 hours ago Posted 6 hours ago 1 hour ago, Nickfromwales said: If it's 9mm PB then yes, but if it's 12.5mm with plaster skim coat then the 30 mins regs are satisfied? I’d like to see a test certificate for a 30 minute FR floor using insulated plasterboard below the floor joists.
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