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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.
Right – Spray foam insulates the walls and ceilings separating the garage from the home.
Rigid foam insulation is installed on the garage side of the shared garage wall and roof of an existing home
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.
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.
This hot climate zone home uses high quality batt insulation between studs to insulate this connecting garage wall.
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.