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do I need a vapour barrier?

Tom
in General Self Build & DIY Discussion

Featured Replies

Hi all, looking some advice on the question of vapour barriers. Out roof make up (from outside to in) is 

 

150mm composite panel (essentially PIR sandwiched between sheet metal)

200mm rockwool

plasterboard

 

I had planned to tape the internal seams between the composite sheets for airtightness. Do I also need a vapour barrier? 

Many thanks

Tom

 

Edited by Tom
typo, thanks markc....

    • Like 1

    You have plasterboard on the outside?

    • Author

    Yep. Moisture resistant. Should have gone for Aquapanel in retrospect

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