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Use caulk, foam, or equivalent material to seal gap between common wall

Use caulk, foam, or equivalent material to seal gap between common wall
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Use low-expanding canned spray foam to seal unused holes, gaps around wires, and seams in the outlet box.

Use low-expanding canned spray foam to seal unused holes, gaps around wires, and seams in the outlet box.
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Use masking tape as a removable sealer to stop air from leaking around the return grille filter.

Use masking tape as a removable sealer to stop air from leaking around the return grille filter.
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Use pry bars to remove the trim around an existing window to access the rough opening

Use pry bars to remove the trim around an existing window to access the rough opening
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Vented Attic vs Unvented Cathedral Attic Air Flow

Vented Attic vs Unvented Cathedral Attic Air Flow
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Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition

Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition
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Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge

Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge
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Ventilation air comes directly from outdoors, not from adjacent dwelling units, garages, crawlspaces, or attics

Ventilation air comes directly from outdoors, not from adjacent dwelling units, garages, crawlspaces, or attics
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Ventilation duct is compressed because supporting strap is too small

Ventilation duct is compressed because supporting strap is too small
Case Study:

Veridian Homes: Cold Climate Region 40+% Energy Savings

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Vertical service shafts and trash chutes are isolated from corridors in multistory buildings by locating them within the vestibules

Vertical service shafts and trash chutes are isolated from corridors in multistory buildings by locating them within the vestibules
Video:

Wallingford Passive House | Blower Door Test

Video:

Wallingford Passive House | Exterior Assembly Details

Video:

Walls Behind Showers and Tubs (2)

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Weatherstrip installation on a door.

Weatherstrip installation on a door.
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Weatherstripping has been installed along the edge of this attic access panel to air seal the opening.

Weatherstripping has been installed along the edge of this attic access panel to air seal the opening.
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Weatherstripping has been installed along the framing of this attic access panel to air seal the opening.

Weatherstripping has been installed along the framing of this attic access panel to air seal the opening.
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What mesh opening size is needed to keep out what type of pests?

What mesh opening size is needed to keep out what type of pests?
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When appliances are pulled out, you can access the sill plate to seal between the wall and subfloor as well as around other holes in the walls for wiring or plumbing.

When appliances are pulled out, you can access the sill plate to seal between the wall and subfloor as well as around other holes in the walls for wiring or plumbing.
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When architects and builders think of the house as a systems, all of the parts are designed to work together for a healthy, durable home that minimizes builder callbacks while cutting energy, maintenance, and repair costs down the road.

When architects and builders think of the house as a systems, all of the parts are designed to work together for a healthy, durable home that minimizes builder callbacks while cutting energy, maintenance, and repair costs down the road.
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When installing insulated vinyl siding around windows, flashing finials should be notched to allow for tabs and corner attachments at each window corner.

When installing insulated vinyl siding around windows, flashing finials should be notched to allow for tabs and corner attachments at each window corner.
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When measuring for the last piece in a course of vinyl siding, measure from the corner post to the foam of the neighboring piece and subtract 1/4 inch to provide room for expansion.

When measuring for the last piece in a course of vinyl siding, measure from the corner post to the foam of the neighboring piece and subtract 1/4 inch to provide room for expansion.
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When using I-joists, make sure to fill in the gaps on each side of the blocking material to air-seal the joist bay where a wall separates conditioned and unconditioned spaces.

When using I-joists, make sure to fill in the gaps on each side of the blocking material to air-seal the joist bay where a wall separates conditioned and unconditioned spaces.
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When wiring is installed in ICF walls, openings made for wire runs should be air-sealed with caulk.

When wiring is installed in ICF walls, openings made for wire runs should be air-sealed with caulk.