Air Leaks
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Air Leaks in Existing Homes
An overview of the common places where houses leak air and compromise performance
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What Is My Roof Trying to Tell Me?
It's possible the pattern of melting snow suggests that something is amiss with the insulation
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High Humidity in the Attic
Insulating the underside of the roof deck solves one problem and creates another
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Tighter Houses with Less Effort
Researchers adapt Aeroseal duct-sealing technology for use on whole houses
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Major Thermal Bypasses
Don’t worry about the cracks around your windows until you’ve sealed all of the big holes in your house
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Joe Lstiburek’s Airtightness Goals
The renowned building engineer explains why the Passivhaus limit of 0.6 ach50 is just fine — except when it isn’t
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Prevent Ice Dams With Air Sealing and Insulation
Roof ventilation and rubber membranes are admissions of defeat
