BASC Search | Building America Solution Center

This hot climate zone home uses high quality batt insulation between studs to insulate this connecting garage wall.

Publication Date

Thu, 01/01/2015 - 12:00

Unfaced batt insulation completely fills the wall cavities.

Rigid Foam Insulation Installed Between Existing House and Garage Walls

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 – Spray foam insulates the walls and ceilings separating the garage from the home.

Publication Date

Mon, 09/30/2019 - 12:00

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

DWG

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

DWG

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

DWG

PDF

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

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

Rigid foam insulation is installed on the garage side of the shared garage wall and roof of an existing home

Publication Date

Mon, 07/01/2013 - 12:00

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.

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.

Side view showing air-sealing and rigid foam insulation is installed over existing wall and ceiling under a room above, then covered with new gypsum board.

Publication Date

Mon, 07/01/2013 - 12:00

Side view showing how the existing garage wall and ceiling are air-sealed prior to installing rigid foam insulation on the garage side of the shared wall of an existing home.

Publication Date

Mon, 07/01/2013 - 12:00

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.

Plan view (from above) showing how the existing garage wall gypsum board is cut away to air-seal the shared wall before adding rigid foam insulation on the garage and exterior walls of the home.

Publication Date

Mon, 07/01/2013 - 12:00

Garage Rim/Band Joist Adjoining Conditioned Space

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

Air Sealing Attached Garage

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

New Whole-House Solutions Case Study: Nelson Construction: Hamilton Way, Farmington, CT

Author(s)

Pacific Northwest National Laboratory

Organization(s)

PNNL

Publication Date

April, 2012

Case study describing the design and testing of 10 high-performance homes in Farmington, Connecticut.