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Is house wrap necessary when using Open-cell Foam? Post New Topic | Post Reply
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Posted: Mar 16, 2009 06:46 PM
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Is house wrap necessary when using Open-cell Foam?
Is a Tyvek type house wrap necessary, or as useful, when using half-pound open-cell foam on the exterior walls? The contractor asked me since he figures he could save some money using a less expensive material such as 15# felt paper.
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mason
Posted: Mar 17, 2009 12:43 PM
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You would not need the house wrap as an air barrier but it would make a nice rain screen over the exterior sheathing. (just in case the windows or roof edges leaks) |
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mason
Posted: Mar 17, 2009 12:43 PM
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You would not need the house wrap as an air barrier but it would make a nice rain screen over the exterior sheathing. (just in case the windows or roof edges leaks) |
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Posted: Mar 18, 2009 11:06 AM
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Thanks Mason, I appreciate the prompt response! |
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Michael Pindell
Posted: Mar 19, 2009 05:41 PM
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#15 felt makes a pretty good rain screen also if it is detailed right. I mostly speak from observations made during 17 years as a carpenter/re-modeler before I became a foam guy. |
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mason
Posted: Mar 19, 2009 07:49 PM
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The felt would be cheaper |
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Gerry Wagoner
Posted: Mar 25, 2009 09:03 PM
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House wrap not needed w/spray foam. go gettum, og |
