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The Habitat affiliate makes its own “ICF” foundation walls with rigid foam held in place with wood spacers.

The Habitat affiliate makes its own “ICF” foundation walls with rigid foam held in place with wood spacers.
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The ICF consists of foam forms that are held in place with plastic or metal spacers and reinforced with metal rebar

The ICF consists of foam forms that are held in place with plastic or metal spacers and reinforced with metal rebar
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The ICF foundation wall of this home is covered with metal flashing before the siding is installed.

The ICF foundation wall of this home is covered with metal flashing before the siding is installed.
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The ICF walls of this home are braced to prepare for pouring the concrete

The ICF walls of this home are braced to prepare for pouring the concrete
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Thermal bridging is eliminated at the rim joist with the use of joist ledgers that are anchored in the wall

Thermal bridging is eliminated at the rim joist with the use of joist ledgers that are anchored in the wall
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These ICF homes are blower door tested during construction, before the drywall is installed, when air leaks can be easily sealed.

These ICF homes are blower door tested during construction, before the drywall is installed, when air leaks can be easily sealed.
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This community of production homes in central New York state was built with insulated concrete forms (ICFs), which provide a highly insulated, airtight structure that is fire-, pest-, wind-, and earthquake-resistant.

This community of production homes in central New York state was built with insulated concrete forms (ICFs), which provide a highly insulated, airtight structure that is fire-, pest-, wind-, and earthquake-resistant.
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Three common ICF wall systems: the flat wall, the waffle wall, and the post-and-beam wall

Three common ICF wall systems: the flat wall, the waffle wall, and the post-and-beam wall
Video:

Transfer Grilles (1)

Video:

Transfer Grilles (2)

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Transfer grilles allow air flow between rooms

Transfer grilles allow air flow between rooms
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Transfer grills and jump ducts provide pathways for air to reach the centrally located HVAC return grille, even when bedroom doors are shut.

Transfer grills and jump ducts provide pathways for air to reach the centrally located HVAC return grille, even when bedroom doors are shut.
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Transom returns are installed over interior doors to provide a pathway for return air

Transom returns are installed over interior doors to provide a pathway for return air
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Utilities are commonly recessed into cutouts in the foam after concrete has been poured

Utilities are commonly recessed into cutouts in the foam after concrete has been poured
Case Study:

Veridian Homes: Cold Climate Region 40+% Energy Savings

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Weiss Building & Development built this custom home in the cold climate in South Elgin, IL, and certified it to DOE Zero Energy Ready Home specifications in 2013.

Weiss Building & Development built this custom home in the cold climate in South Elgin, IL, and certified it to DOE Zero Energy Ready Home specifications in 2013.
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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.
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Window and door rough openings in the ICF wall are surrounded with pressure-treated wood

Window and door rough openings in the ICF wall are surrounded with pressure-treated wood
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Wiring runs are covered with canned spray foam to maintain the continuous foam layer that covers the inside and outside of these ICF block walls.

Wiring runs are covered with canned spray foam to maintain the continuous foam layer that covers the inside and outside of these ICF block walls.
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Zero Net Now built this custom for buyer home in the cold climate in Wallkill, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.

Zero Net Now built this custom for buyer home in the cold climate in Wallkill, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.