Insulation & Air Sealing

Extreme Cold-Climate Wall Hacks

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Furring and foam on the INSIDE for better walls in really cold places.

Exterior Assembly Details for a Pacific Northwest Passive House

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The most effective (and easiest) time to detail the air barrier is during the framing stage. If it isn't specified during design, ain't no way the framers are gonna get it right.

Energy Star Checklist, Section 1: Overall Air Barrier and Thermal Alignment

Energy Star Thermal Bypass Checklist: Overall Air Barrier and Thermal Alignment

18 Videos, articles, and animations showing you how to get through Section 1 of the Energy Star Thermal Bypass Checklist. It is about the continuity between various components of the air barrier system and the thermal envelope.

 

Modified Larsen Truss Retrofit: I-Joists on a Roof

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Framing a roof with I-joists over the existing roof makes a ton of room for insulation and offers a short lesson in vapor movement through assemblies

Moisture Management Design Rule 2: Manage Condensation

Condensation is when moisture in the air hits a cool enough surface to convert the vapor into water.

How Ice Dams Form, and How To Stop Them

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Four ways to prevent ice dams in three types of roof, for two climates in one video. Boom.

 

How To Install House Wrap #TheRightWay

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Counting down the top 15 pages of 2016. This one is #2. Stop rot with house wrap

Live Demos in Boston at ABX

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Hands-on training with local pros at the largest construction event in the Northeast

Ice Dam Podcast: What, How, Why, and Prevention

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A big problem, for roofs in cold climates, but what causes it and how can you fix it?

 

Airtight Walls—Housewrap and Sheathing as an Air Barrier

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A tight air barrier is the best way to build an energy-efficient house. Outside the sheathing are many chances to make it better.

Outie Window Details for Walls with Thick Exterior Insulation

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A thermal break and solid backing puts the window on the outer face of a thick wall. Now, there's room on the inside window sill for cats and bowling trophies

 

Stack Effect: 7 Minutes of BS (#buildingscience)

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Stack effect is relentless: it is always working, when you’re awake or asleep, even during blackouts. And it feeds on itself.

 

Air Sealing a Dropped Soffit: Why and How in Three Minutes

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When air sealing a house, begin with the biggest holes and work toward the small ones

Infill Foundation for a Four-Story Passive House

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"In order to maximize the buildable area on the infill lot, we had to go fairly deep and do some extensive shoring."

—Dan Whitmore of Hammer & Hand 

Thermal Bridging: A Podcast About BS (#buildingscience)

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This is the first episode of 7 Minutes of BS (building science). We break it down with engineers and building scientists.