Air Sealing

JLC Field Guide: Air Sealing

Sealing potential leaks in the building envelope is an essential step in building a durable, energy-efficient structure. It’s easy to focus on insulation, but without careful air-sealing, insulation is all but useless.

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Air-Sealing Without Foam

Tape is best, but the right caulk can also provide a tough, reliable seal More

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An Air-Sealing Priority List

To cost-effectively meet air-sealing requirements for new construction, some leaks... More

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Thermal Imaging With a Blower Door

Though it's impossible to seal every hole in an existing building to prevent air... More

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Air-Sealing for Hot Climates

Excluding heat and humidity saves energy, improves comfort, and increases durability More

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Retrofit Air-sealing

Phil Armand describes the tools, materials, and methods he uses to air-seal leaky... More

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Air-Sealing an Ice-Prone Home

Chris West troubleshoots an ice damming problem in a Cape-style home, a common... More

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Air-Sealing Framing

Bad things can happen if complex roofing, ganged framing, and marriage walls... More

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Air Sealing Instruction

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Air-Sealing a Brick Wall

Make sure the wall is well-pointed, then apply your choice of material on the... More

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Preventing Common Air Leaks

Focus on a building's high and low points, and where one material or part of an... More

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Weatherizing a Double-Wall Metal Chimney

Here's the right way to air-seal and insulate an existing double-wall metal chimney. More

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High-Performance Energy Details for 2x4 Walls

Here’s a new resource for high-performance building and design professionals. More

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