<html><head></head><body>Yes. It is critical to provide a water control layer!!!! All you have done by taping the plywood is produce an air barrier. <div>Building paper or a housewrap installed shingle fashion would be an example of a water control layer. Plywood is not. <br><br><div id="1329852532938-sig-id">Sent from my BlackBerry® PlayBook™<br>www.blackberry.com</div><br><hr><div><strong>From:</strong> "Reuben Deumling" <9watts@gmail.com><br><strong>To:</strong> "Greenbuilding" <greenbuilding@lists.bioenergylists.org><br><strong>Sent:</strong> 1 July, 2013 1:46 AM<br><strong>Subject:</strong> [Greenbuilding] taping plywood seams vs. vapor barrier<br></div><br><div dir="ltr">If I carefully tape all the seams on the plywood sheathing, and achieve the dense pack cellulose I'm aiming for, is !!!there a reason to also use a Tyvek type paper on the exterior as well? <br></div>
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