Dave Kruger wrote: > Joseph Pylka wrote: >> It's not a breathable material but rather a vapor barrier. That is what >> it is ordinarily sold as. > > I've heard Tyvek described as a "vapor barrier" before, but I think that > is very misleading language. In northern climes, if you put a vapour barrier on the outside of the house, the structure would become a mouldy pile of rotten wood. The vapour barrier (usually polyethylene) goes on the inside of the structural components and the house wrap (Tyvek or similar products) goes on the outside. It has to be breathable - the objective is to keep the insulation and structure dry and provide a windproof and water-resistant barrier on the outside. If Tyvek was a suitable product for outdoor gear to the extent some folks think, manufacturers would swarm to it. The fact that so few do should tell you everything about how appropriate it is as a material. Mike *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Wed Jun 13 2007 - 05:47:41 PDT
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