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The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

The missing top plate in a kneewall was covered with lumber and rigid foam insulation and then sealed with spray foam

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Right – all seams in the rigid foam were sealed with tape before installing the wire lathe for stucco.

Right – all seams in the rigid foam were sealed with tape before installing the wire lathe for stucco.

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Right-Wall-insulating sheathing is extended up to roof rafters and sealed around the framing with spray foam

Right-Wall-insulating sheathing is extended up to roof rafters and sealed around the framing with spray foam

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Air Barriers - Tub, Shower and Fireplace Enclosures, Info-407

Reference

Brochure about creating an air barrier at tub, shower and fireplace walls.

Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.

Right – This attic knee wall and the floor joist cavity openings beneath it are being sealed and insulated with spray foam.

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Spray foam provides a critical seal between the subfloor, rim joist, and sill plate

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Right – Coated OSB provides a weather-resistant air barrier for this envelope of this home.

Right – Coated OSB provides a weather-resistant air barrier for this envelope of this home.

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Gaps at shared common walls can be a significant source of air leakage in multi-family buildings

Gaps at shared common walls can be a significant source of air leakage in multi-family buildings

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The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

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Insulating sheathing is extended up to the roof rafters and sealed around the framing with spray foam as part of this exterior wall retrofit

Insulating sheathing is extended up to the roof rafters and sealed around the framing with spray foam as part of this exterior wall retrofit

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Rigid foam or wood blocking can be installed and sealed as shown to prevent airflow through the wall cavities between two rooms of different ceiling heights.

Rigid foam or wood blocking can be installed and sealed as shown to prevent airflow through the wall cavities between two rooms of different ceiling heights.

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Balloon framing at a gable end wall allows air to flow from the conditioned space and the wall cavity into the attic.

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Pumpkin Ridge Passive House Video #007: Wall-To-Roof Air Barrier Details

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Video describing the wall-to-roof air barrier details of a passive house.

Right – This low-slope roof and parapet assembly has continuity of both the air and water barriers

Right – This low-slope roof and parapet assembly has continuity of both the air and water barriers

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Wrong - Wall cavities behind shower are not completely filled with insulation and are lacking the solid interior air barrier.

Wrong - Wall cavities behind shower are not completely filled with insulation and are lacking the solid interior air barrier.

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Right - Seams in coated sheathing and joints around window are properly sealed and flashed with tape and all nail holes are covered with paint-on sealant.

Right - Seams in coated sheathing and joints around window are properly sealed and flashed with tape and all nail holes are covered with paint-on sealant.

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The I-joist is continuous along the shared wall and serves as a natural air barrier between the garage and the house

The I-joist is continuous along the shared wall and serves as a natural air barrier between the garage and the house

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Air barrier at garage band joist - 1 1/2 inch rigid insulation with 2x4 sleepers

CAD File

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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Air barrier at garage band joist - 1 inch rigid insulation with 1x3 wood furring

CAD File

Air barrier at garage band joist - 1 inch rigid insulation with 2x2 wood furring

CAD File

Wrong - Dark patterns on the Home's exterior siding show where warm air is leaking into the wall cavities.

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Pumpkin Ridge Passive House Video #009: Wall-To-Roof Air Barrier (Part II)

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Video describing the wall-to-roof air barrier details of a passive house.

Pumpkin Ridge Passive House Video #13: Completed Wall-to-Attic Air Barrier Details

Video

Video describing the wall-to-attic air barrier details of a passive house.

In this gut rehab, drywall was removed then a sprayer-applied sealant was used to seal all large cracks and seams and then the 2x4 walls were filled with spray foam.

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Wrong - Dark pattern on wall is showing where warm air is leaking into the wall cavity from interior of home.

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Wrong: open wall cavity connected to this return air plenum is allowing cellulose attic insulation to be pulled into the furnace

Wrong: open wall cavity connected to this return air plenum is allowing cellulose attic insulation to be pulled into the furnace

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Wrong - When ceiling joists over a garage run perpendicular to the adjoining wall, the joist bays must be blocked and sealed to prevent garage fumes from entering the living space

Wrong - When ceiling joists over a garage run perpendicular to the adjoining wall, the joist bays must be blocked and sealed to prevent garage fumes from entering the living space

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Wrong - The faced batt insulation does not provide an air barrier in the joist bay between the garage and the conditioned space of the home.

Wrong - The faced batt insulation does not provide an air barrier in the joist bay between the garage and the conditioned space of the home.

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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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