BASC Search | Building America Solution Center

Right – Several potential sources of air leakage into the attic have been air sealed; canned spray foam was used to seal around duct boots, along seams in the drywall, and along top plates.

Right – Several potential sources of air leakage into the attic have been air sealed; canned spray foam was used to seal around duct boots, along seams in the drywall, and along top plates.

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How to air seal attic can lights – Rule Your Attic! with ENERGY STAR

Video

Video describing how homeowners can save energy by air sealing their home's attic can lights.

How to air seal attic electrical boxes – Rule Your Attic! With ENERGY STAR

Video

Video describing how homeowners can save energy by air sealing their home's attic electrical boxes.

How to air seal attic plumbing pipe – Rule Your Attic! with ENERGY STAR

Video

Video describing how homeowners can save energy by air sealing their home's attic plumbing pipes.

Wrong - This IR image is showing a lack of air-sealing is allowing cold air to enter the home around the windows and at the base of the wall.

Wrong - This IR image is showing a lack of air-sealing is allowing cold air to enter the home around the windows and at the base of the wall.

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Air seal door and window rough openings with backer rod, caulk, or nonexpanding foam

Air seal door and window rough openings with backer rod, caulk, or nonexpanding foam

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Pumpkin Ridge Passive House Video #15: Window Install Prep & Air Sealing

Video

Video describing how to prep and air seal the wall cavity for window installation.

Building America Energy Performance Brief: Air Sealing Duct Boots and Duct Chases

Case Study

Case study describing how to inspect and air seal around duct boots and chases in order to limit air leakage in a home.

Wrong - Rigid insulation blocking is installed but not air-sealed with spray foam around edges.

Wrong - Rigid insulation blocking is installed but not air-sealed with spray foam around edges.

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Right - Walls and ceilings shared by the garage and living space must be air sealed and insulated.

Right - Walls and ceilings shared by the garage and living space must be air sealed and insulated.

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Plan view showing air sealing between exterior walls and intersecting interior walls

Plan view showing air sealing between exterior walls and intersecting interior walls

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A fire-rated sealant "putty pad" is used to air seal an electrical outlet box

A fire-rated sealant "putty pad" is used to air seal an electrical outlet box

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Two pillows and two garbage bags are used to make a chimney air sealing pillow

Two pillows and two garbage bags are used to make a chimney air sealing pillow

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Right - Ducts and heat pump cabinet are properly sealed with mastic, high MERV filter is installed, and duct and refrigerant lines are air sealed at ceiling.

Right - Ducts and heat pump cabinet are properly sealed with mastic, high MERV filter is installed, and duct and refrigerant lines are air sealed at ceiling.

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Spray foam insulates and air-seals the ceiling deck and top plates of this vented attic.

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The trim-to-flooring seam can be caulked to provide an air seal at the base of the walls.

The trim-to-flooring seam can be caulked to provide an air seal at the base of the walls.

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Air seal all holes and seams in the furnace cabinet with mastic, foil tape, or putty

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Right – A flexible tape is used to air-seal around wiring holes in the coated sheathing.

Right – A flexible tape is used to air-seal around wiring holes in the coated sheathing.

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Right – All of the cabinet seams in this HVAC air furnace are sealed with an approved metal tape.

Right – All of the cabinet seams in this HVAC air furnace are sealed with an approved metal tape.

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Right - Mastic is being installed to air seal the wood-to-wood joints in this wall.

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Canned spray foam can be used to air seal the rough opening around the windows

Canned spray foam can be used to air seal the rough opening around the windows

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The baffle is air sealed in place with spray foam before installing fiberglass or cellulose insulation

The baffle is air sealed in place with spray foam before installing fiberglass or cellulose insulation

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Air Sealing Retrofits: Conducting an IR Camera Inspection of an Existing Home - Return Grills

Video

Video showing how to use an infrared camera to identify and check for air leakage from the return grills of the home.

Air Sealing Retrofits: Conducting an IR Camera Inspection of an Existing Home - Recess Lighting

Video

Video showing how to use an infrared camera to check for air leakage around recessed can lights during a blower door test in winter.

Closed-cell backer rod is installed for air-sealing window and door rough openings.

Closed-cell backer rod is installed for air-sealing window and door rough openings.

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Fiberglass mesh tape is installed around a duct boot in preparation for air sealing with mastic

Fiberglass mesh tape is installed around a duct boot in preparation for air sealing with mastic

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Duct boot is air sealed to ceiling by covering the seam with fiberglass mesh tape and mastic

Duct boot is air sealed to ceiling by covering the seam with fiberglass mesh tape and mastic

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Right - An installer uses canned spray foam to air seal joints in an existing subfloor.

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Right – Chase capped with rigid air barrier and duct work penetrations properly sealed

Right – Chase capped with rigid air barrier and duct work penetrations properly sealed

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Wrong – Whole house fan installed with holes in surrounding platform that need to be air sealed

Wrong – Whole house fan installed with holes in surrounding platform that need to be air sealed

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