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Insulated floor above garage - cavity insulation with 1 inch rigid insulation with 1x3 wood furring

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Insulated floor above garage - cavity insulation with 1 inch rigid insulation with 2x2 wood furring

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Insulated floor above garage - cavity insulation with 1 1/2 inch rigid insulation with 2x4 sleepers

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Insulated floor above garage - cavity insulation with 1 1/2 inch rigid insulation with 1x3 wood furring

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Batt insulation is not an effective air barrier

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Wrong – Insulation is misaligned with floor above

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Right – Insulation is in contact with floor above

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Insulation Installation Guide: Air Sealing Garage

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Video describing a technique for airtight drywall installation on garage walls using foam gasket strips.

Rigid Foam Insulation Installed Between Existing House and Garage Walls

Guide

Guide describing how to upgrade walls that separate the garage from the house by providing a continuous air control layer on the garage side of the wall and adding rigid foam insulation.

Right – The band joist over this wall was properly insulated and air-sealed.

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

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Wrong - Rigid insulation blocking is installed but not air-sealed with spray foam around edges.

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Right - Walls and ceilings shared by the garage and living space must be air sealed and insulated.

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Air-seal and insulate the rim and band joists of walls separating an attached garage from the home’s conditioned 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.

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Right – Closed-cell spray foam insulates and air-seals the rim joist above a shared wall between the garage and living space.

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To ensure a complete air barrier between the garage and the house, the wall between the garage and the house was insulated and air-sealed with four inches of high-density spray foam.

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Air-seal the floor above a garage when there is living space above the garage and make sure floor insulation is in full contact with the underside of the subfloor.

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Right – Closed-cell spray foam insulation in the shared wall between the garage and living space helps to air-seal the wall and protect occupants from garage pollutants.

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Floor Above Garage

Guide

Guide describing how to create an air barrier between the garage and the conditioned space above it to prohibit pollutants from entering a home's interior.

Garage Rim/Band Joist Adjoining Conditioned Space

Guide

Guide describing the air-sealing of rim joists on walls connecting homes and attached garages.

Air Sealing Attached Garage

Guide

Guide describing ways to air-seal an attached garage in new and existing homes.