Currently converting my garage which is integral to the house. The garage is a flat cold roof. Following discussion with building control, I have installed mushroom roof vents and fascia vents. My architect has recommended 50mm Kingspan between the joists and then 37.5 insulated plasterboard. There is no mention of a vapour barrier. Can anyone confirm if I need a vapour barrier below the 50mm Kingspan? My only concern with installing the vapour barrier and the recommendation of 37.5 insulated plasterboard and the condensation forming between the vapour barrier and the insulated plasterboard. Thanks Ryan
Garage Conversion
- Thread starter Risho999
- Start date
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If it’s foil fronted kingspan, when you seal the joints with foil tape, that creates a vapour barrier
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