Vapor Barrier- Page 2 of 3
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Outward Vapor Diffusion
Airtight wall and roof assemblies must accound for outward wintertime vapor diffusion to prevent moisture accumulation problems
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Second Guessing an Insulation Upgrade
A homeowner has added a layer of rigid insulation to some interior walls, and now wonders if he’s made a big mistake
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What Happens When You Put a Plastic Vapor Barrier in Your Wall?
A look at the physics of humid air and cool surfaces
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Understanding Air Barriers, Vapor Barriers, and Drainage Planes
These three terms refer to different materials that are easy to confuse
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All About Attic Venting
We vent attics for four reasons, and all four goals can be better achieved by adopting measures other than attic venting
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The History of Peeling Paint, Insulation, and Vapor Barriers
When painters objected to painting insulated houses in the 1930s, building scientists latched onto the wrong solution
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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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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?
