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    I'm just curious where you do want the condensation to happen?<br>
    <br>
    <div class="moz-cite-prefix">On 2015-08-30 01:10 PM, Ross Elliott
      wrote:<br>
    </div>
    <blockquote
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        <p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
            lang="EN-US">I know Tyvek is way more permeable to water
            vapour than Typar, which are the only two choices available
            locally, but I'm building a sugar shack, which as its
            primary function is to dissipate a tremendous amount of
            water vapour. I don't want the water to condense on the
            ceiling air barrier, otherwise it may drip back into the
            syrup.  What's the absolute most vapour-permeable air
            barrier on the market, including those esoteric European
            membranes?<o:p></o:p></span></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:HelveticaNeue-Light;color:#768523;mso-fareast-language:EN-CA">Ross
              Elliott </span></b><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif;color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:7.0pt;font-family:HelveticaNeue-Medium;color:#768523;mso-fareast-language:EN-CA">LEED-AP,
            RASDT, CPHC</span><span
            style="color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:HelveticaNeue-Medium;color:#656565;background:white;mso-fareast-language:EN-CA">President</span><span
style="font-family:HelveticaNeue-Light;color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:HelveticaNeue-Medium;color:#656565;background:white;mso-fareast-language:EN-CA">Homesol
            Building Solutions Inc.</span><span
style="font-family:HelveticaNeue-Light;color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:HelveticaNeue-Light;color:#1F497D;mso-fareast-language:EN-CA"><img
              id="Picture_x0020_1"
              src="cid:part1.00010105.02010206@shaw.ca"
              alt="cid:image001.gif@01D09199.91152410" height="94"
              width="181"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:HelveticaNeue-Light;color:#494849;mso-fareast-language:EN-CA">53
            Herriott Street, Suite 202-B</span><span
            style="font-family:"Times New
            Roman",serif;color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:HelveticaNeue-Light;color:#494849;mso-fareast-language:EN-CA">Perth,
            ON  K7H 1T5</span><span
            style="color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><b><span
              style="font-size:9.0pt;color:#494849;mso-fareast-language:EN-CA">(613)
              466-0664 </span></b><span
            style="color:#494849;mso-fareast-language:EN-CA"><br>
          </span><span
style="font-size:9.0pt;font-family:HelveticaNeue-Light;color:#494849;mso-fareast-language:EN-CA">Toll-free: (844)
            466-0664</span><span
            style="color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:HelveticaNeue-Light;color:#494849;mso-fareast-language:EN-CA">Fax: (613)
            466-0660</span><span
            style="color:#1F497D;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-CA"><a
              moz-do-not-send="true" href="http://www.homesol.ca/"><b><span
                  style="font-family:HelveticaNeue-Light;color:blue"><a class="moz-txt-link-abbreviated" href="http://www.homesol.ca">www.homesol.ca</a></span></b></a><span
              style="color:#1F497D"><o:p></o:p></span></span></p>
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              id="Picture_x0020_4"
              src="cid:part3.08000807.02050400@shaw.ca"
              alt="cid:image004.png@01D0BB24.60F4FF30" height="61"
              width="242" border="0"></span><span
            style="mso-fareast-language:EN-CA"><o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
            lang="EN-US"></span><o:p></o:p></p>
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