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    • 6 September 2016 at 7:34 pm #31972
      Anonymous

        Hi AECB forum

        I have a question regarding the use of plaster as the airtight internal layer in a retrofit: does the plaster topcoat have to be polished for it to be considered airtight?

        Thanks for your help

        Clym and Ellie

      • 7 September 2016 at 9:07 am #39239
        Mark Siddall
        Participant

          A polished finish as you describe it may offer some small improvements, but what I've read in research papers you'll get 99% of the way there simply using unfinished wet plaster.

        • 7 September 2016 at 5:26 pm #39240
          Anonymous

            Great! That'll save a bit of time. Thank you very much for the information.

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