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A self-adhering weather-resistant barrier is installed over the existing sheathing of this retrofit home to provide air sealing and a drainage plane before installing new metal and wood siding on the home.

A self-adhering weather-resistant barrier is installed over the existing sheathing of this retrofit home to provide air sealing and a drainage plane before installing new metal and wood siding on the home.
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A vapor barrier was installed on the floor of this crawlspace and extended up the walls then the foundation walls were covered with rigid foam.

A vapor barrier was installed on the floor of this crawlspace and extended up the walls then the foundation walls were covered with rigid foam.
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Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.

Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.
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Brick wall assembly for a hot-humid climate with no Class I vapor retarder and with an air gap (drained cavity) to dissipate vapor driven into the wall by the sun.

Brick wall assembly for a hot-humid climate with no Class I vapor retarder and with an air gap (drained cavity) to dissipate vapor driven into the wall by the sun.
Presentation:

Building Code Training - Residential Thermal Envelope - Air Sealing

Video:

Cold Climate Building Techniques and Concepts: Vapor retarder

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Exterior Air Barrier

Exterior 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.
Video:

Hot Spot: Closed Crawlspace - Sealing the Ground Vapor Retarder to the Wall

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Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam

Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam
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Interior Air Barrier

Interior Air Barrier
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Masonry wall interior retrofit with parge coat, fluid-applied water control layer, rigid mineral wool, wood-framed wall with cavity insulation, smart vapor barrier, and wood or metal service cavity

Masonry wall interior retrofit with parge coat, fluid-applied water control layer, rigid mineral wool, wood-framed wall with cavity insulation, smart vapor barrier, and wood or metal service cavity
Video:

Passive House Underslab Foam & Vapor Barrier: Karuna Video #6

CAD File:

Polyethylene Over Aggregate

Preview Image
Polyethylene Over Aggregate
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Right - A smart vapor barrier wraps the walls and window frames of this home. Seams are taped to provide an air- and water-resistant barrier.

Right - A smart vapor barrier wraps the walls and window frames of this home. Seams are taped to provide an air- and water-resistant barrier.
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Right - A technician wraps the foundation piers with a vapor retarder in preparation for laying vapor retarder over the floor of this crawlspace.

Right - A technician wraps the foundation piers with a vapor retarder in preparation for laying vapor retarder over the floor of this crawlspace.
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Right - After wrapping the posts, a technician lays a vapor retarder over the floor of a crawlspace.

Right - After wrapping the posts, a technician lays a vapor retarder over the floor of a crawlspace.
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RIght - Furring strips, house wrap, and siding are installed in the field after assembling panelized walls.

RIght - Furring strips, house wrap, and siding are installed in the field after assembling panelized walls.
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Right - House wrap is carefully installed from the top of the roof line to the foundation; seams are overlapped and taped to provide a continuous air- and weather-resistant barrier

Right - House wrap is carefully installed from the top of the roof line to the foundation; seams are overlapped and taped to provide a continuous air- and weather-resistant barrier
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Right - Mold- and water-resistant fiber glass insulating sheathing is installed after panelized walls are assembled on site.

Right - Mold- and water-resistant fiber glass insulating sheathing is installed after panelized walls are assembled on site.
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Right - Panelized walls came to site with house wrap and furring strips pre-installed; seams will be overlapped and taped on site.

Right - Panelized walls came to site with house wrap and furring strips pre-installed; seams will be overlapped and taped on site.
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Right - Panelized walls came to site with house wrap pre-installed and ready to unfurl to cover foundation-to-sheathing seam.

Right - Panelized walls came to site with house wrap pre-installed and ready to unfurl to cover foundation-to-sheathing seam.
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Right - Spray foam covers the walls and a sealed vapor retarder lines the floor of this unvented crawl space.

Right - Spray foam covers the walls and a sealed vapor retarder lines the floor of this unvented crawl space.
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Right - Technicians use adhesive when installing the vapor barrier along the walls of this crawlspace.

Right - Technicians use adhesive when installing the vapor barrier along the walls of this crawlspace.