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Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole

Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole
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Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole

Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole
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Foam holes in open-web floor trusses to completely seal the rim joist

Foam holes in open-web floor trusses to completely seal the rim joist
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Framing is sequenced to install an air barrier of OSB, plywood, or rigid foam between the porch and the attic.

Framing is sequenced to install an air barrier of OSB, plywood, or rigid foam between the porch and the attic.
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Fully Sealed Continuous Weather Resistance Barrier (1)

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Fully Sealed Continuous Weather Resistance Barrier (3)

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Furred-out siding

Furred-out siding
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Garage Exhaust Fans

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Glasswood Commercial Passive House Retrofit: Air Barrier

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Horizontal furring strips are installed over a taped smart membrane that serves as an air and vapor barrier and holds in insulation; the furring strips will provide a nailing surface for tongue-and-groove wood porch ceiling cladding.

Horizontal furring strips are installed over a taped smart membrane that serves as an air and vapor barrier and holds in insulation; the furring strips will provide a nailing surface for tongue-and-groove wood porch ceiling cladding.
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House wrap is sealed at all seams and overlaps flashing to serve as a continuous drainage plane over the exterior walls.

House wrap is sealed at all seams and overlaps flashing to serve as a continuous drainage plane over the exterior walls.
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Identify what materials will constitute the continuous air barrier around the building envelope.

Identify what materials will constitute the continuous air barrier around the building envelope.
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Infrared image of a rim joist

Infrared image of a rim joist
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Infrared imaging shows cold conditioned air pouring out of the open floor cavities under this attic kneewall into the hot unconditioned attic

Infrared imaging shows cold conditioned air pouring out of the open floor cavities under this attic kneewall into the hot unconditioned attic
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Insert rigid blocking pieces into each joist bay and fasten with caulk or nails

Insert rigid blocking pieces into each joist bay and fasten with caulk or nails
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Inspection of taped joint

Inspection of taped joint
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Install a continuous air barrier below or above ceiling insulation and install wind baffles.

Install a continuous air barrier below or above ceiling insulation and install wind baffles.
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Install a rigid air barrier to separate the porch attic from the conditioned space.

Install a rigid air barrier to separate the porch attic from the conditioned space.
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Install a self-closing door with weatherstripping and thoroughly air-seal the shared house-garage walls to help keep automobile exhaust and other pollutants out of the home.

Install a self-closing door with weatherstripping and thoroughly air-seal the shared house-garage walls to help keep automobile exhaust and other pollutants out of the home.
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Install all layers of the drainage plane to overlap, not underlap, to direct bulk water down and out of the wall.

Install all layers of the drainage plane to overlap, not underlap, to direct bulk water down and out of the wall.
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Install an air barrier behind fireplaces installed on exterior walls

Install an air barrier behind fireplaces installed on exterior walls
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Install an air barrier behind showers and tubs installed on exterior walls.

Install an air barrier behind showers and tubs installed on exterior walls.
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Install an air barrier behind staircases installed on exterior walls.

Install an air barrier behind staircases installed on exterior walls.
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Install an air barrier on the exterior of attic knee wall insulation.

Install an air barrier on the exterior of attic knee wall insulation.