Vapor Retarder- Page 2 of 3
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Smart Vapor Retarders
Modern replacements for the troublesome old poly vapor barrier have low permeance in cool, dry weather, and high permeance in humid weather
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How to Deal With a Vapor Barrier Edict
When a local code inspector insists on an interior polyethylene vapor barrier, plans for a simple addition to a Canadian home suddenly get more complicated
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Facing Kraft-Faced Fiberglass Batts
Should the paper facing of batt insulation face the inside or outside? The answer lies with the material's permeance.
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Do I Need a Vapor Retarder?
Someday, builders will stop asking this recurring question — but unfortunately, that day has not yet come
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Vapor Barriers Redux
Are there any risks if you build an exterior wall without an interior polyethylene vapor retarder?
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Joe Lstiburek Discusses Basement Insulation and Vapor Retarders
An all-day seminar with Dr. Joe yields two news stories, a six-digit idea, and plenty of quotable opinions and conclusions
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European Products for Building Tight Homes
A new importer in Brooklyn is distributing European tapes, housewrap, ventilation fans, and a ‘magic box’
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Can Polyethylene Be Used as an Air Barrier?
A material that's fallen out of favor might still have a legitimate use
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Calculating the Minimum Thickness of Rigid Foam Sheathing
In this case, the code is your friend — just follow the IRC’s foam thickness table
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Vapor Profiles Help Predict Whether a Wall Can Dry
To avoid moisture problems in walls, think about the permeability of all the wall’s components — not just the “designated” vapor retarder
