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Vapour Control Layers

  • 04-12-2012 10:38PM
    #1
    Ray Dow
    Registered Users, Registered Users 2 Posts: 66 ✭✭


    Hi,

    I was wondering if anyone could explain why a VCL is always recommended between a concrete flat roof and the roof insulation & never (not in the books i'm studying anyway) between an inner leaf of block work & the wall insulation.

    Is there not a danger in both cases of moisture laden air passing through to the the cold side of the insulation?

    Cheers in advance for any help


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