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Quick question regarding VCL

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Quick question regarding VCL

Postby Miffer79 » 06 Mar 2019, 13:21

Hi all,

Just a quick question regarding a VCL on my current workshop build. I have lots (47 nearly full rolls) of Cromar Vent 3 breathable membrane that I got for virtually no money, so I'm wondering if it could be used as a VCL on the inside walls and ceiling? I know a VLC is cheap enough but I've already got the membrane.

Cheers, Brian
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Re: Quick question regarding VCL

Postby Mike G » 06 Mar 2019, 13:39

No, that sort of stuff goes on the outside of the roof and frame, not the inside. If you use an internal lining of OSB or ply, then you don't need any sort of additional vapour barrier on the inside face of the studs.
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Re: Quick question regarding VCL

Postby Miffer79 » 06 Mar 2019, 13:57

Thanks for the reply Mike. I'm not sure what my lining will be (probably 5x1 softwood) so I'm going to use a VCL anyway. I know that the membrane is for exterior walls and roofs but assumed or hoped as the membrane is waterproof and airtight in one direction that it would be fine to use as VCL, if need be I'll buy a proper VCL sheet.

Thanks, Brian
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