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Primer for Lime based render

  • 27-05-2018 4:14pm
    #1
    TiNcAn
    Registered Users, Registered Users 2 Posts: 154 ✭✭


    I am wondering if I need to apply a primer to a failure smooth clay brick surface before starting with the first lime scud/harl coat. My builder suggested to use PVA mixed with water but I think this would be counterproductive as it would reduce vapour permeability.

    Any suggestions on what to use in this case or whether it is needed at all?


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