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Tim O'Brien Homes built this custom home in the cold climate in New Berlin, WI, and certified it to DOE Zero Energy Ready Home specifications in 2018.

Tim O'Brien Homes built this custom home in the cold climate in New Berlin, WI, and certified it to DOE Zero Energy Ready Home specifications in 2018.
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Tim O'Brien Homes built this custom spec home in the cold climate in New Berlin, WI, and certified it to DOE Zero Energy Ready Home specifications in 2020.

Tim O'Brien Homes built this custom spec home in the cold climate in New Berlin, WI, and certified it to DOE Zero Energy Ready Home specifications in 2020.
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To reduce the risk of condensation on the interior of the roof sheathing in cold weather, the ratio of exterior (above-deck) insulation must be increased as a percent of total attic insulation as outside temperature decreases

To reduce the risk of condensation on the interior of the roof sheathing in cold weather, the ratio of exterior (above-deck) insulation must be increased as a percent of total attic insulation as outside temperature decreases
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Transformations built this production home in the cold climate in Devens, MA, and certified it to DOE Zero Energy Ready Home specifications in 2013.

Transformations built this production home in the cold climate in Devens, MA, and certified it to DOE Zero Energy Ready Home specifications in 2013.
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Underneath the roof sheathing and two exterior layers of rigid foam, the builder stapled netting to the underside of the rafters and filled the roof cavities of the unvented attic with blown-in fiberglass insulation.

Underneath the roof sheathing and two exterior layers of rigid foam, the builder stapled netting to the underside of the rafters and filled the roof cavities of the unvented attic with blown-in fiberglass insulation.
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United Way built this affordable home in the mixed-humid climate in Deer Park, NY, and certified it to DOE Zero energy Ready Home specifications in 2016.

United Way built this affordable home in the mixed-humid climate in Deer Park, NY, and certified it to DOE Zero energy Ready Home specifications in 2016.
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United Way of Long Island built this affordable home in the mixed-humid climate in Coram, NY, and certified it to DOE Zero Energy Ready Home specifications in 2018.

United Way of Long Island built this affordable home in the mixed-humid climate in Coram, NY, and certified it to DOE Zero Energy Ready Home specifications in 2018.
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United Way of Long Island built this affordable home in the mixed-humid climate in Deer Park, NY, and certified it to DOE Zero Energy Ready Home specifications in 2015.

United Way of Long Island built this affordable home in the mixed-humid climate in Deer Park, NY, and certified it to DOE Zero Energy Ready Home specifications in 2015.
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United Way of Long Island built this affordable home in the mixed-humid climate in East Patchogue, NY, and certified it to DOE Zero Energy Ready Home specifications in 2019.

United Way of Long Island built this affordable home in the mixed-humid climate in East Patchogue, NY, and certified it to DOE Zero Energy Ready Home specifications in 2019.
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United Way of Long Island built this affordable home in the mixed-humid climate in Huntington Station, NY, and certified it to DOE Zero Energy Ready Home specifications in 2017.

United Way of Long Island built this affordable home in the mixed-humid climate in Huntington Station, NY, and certified it to DOE Zero Energy Ready Home specifications in 2017.
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United Way of Long Island built this affordable home in the mixed-humid climate in Medford, NY, and certified it to DOE Zero Energy Ready Home specifications in 2021.

United Way of Long Island built this affordable home in the mixed-humid climate in Medford, NY, and certified it to DOE Zero Energy Ready Home specifications in 2021.
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United Way of Long Island built this affordable home in the mixed-humid climate in Port Jefferson Station, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.

United Way of Long Island built this affordable home in the mixed-humid climate in Port Jefferson Station, NY, and certified it to DOE Zero Energy Ready Home specifications in 2020.
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Unity Homes built this custom spec home in the cold climate in Walpole, NH, and certified it to DOE Zero Energy Ready Home specifications in 2017.

Unity Homes built this custom spec home in the cold climate in Walpole, NH, and certified it to DOE Zero Energy Ready Home specifications in 2017.
Video:

Unvented Attic Insulation (1)

Video:

Unvented Attic Insulation (2)

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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition
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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition

Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition
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Using dry wall clips or a 1x nailer strip to avoid the third stud in corners provides more room for insulation and reduces lumber.

Using dry wall clips or a 1x nailer strip to avoid the third stud in corners provides more room for insulation and reduces lumber.
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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
Video:

Wall Assembly | Madrona Passive House

Video:

What Type of Connection is Critical in Creating a Continuous Path Differing Loads?

Presentation:

Why Are Attics Insulated With Open-Cell Spray Foam So Damp?

Why Are Attics Insulated With Open-Cell Spray Foam So Damp?