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Wrong – Cantilever is not blocked or insulated.

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Insulating and Air Sealing Existing Floor Overhangs (Cantilevers)

Guide

Guide describing how to insulate a floor overhang (or cantilever) on an existing home by adding insulation and an air barrier to air seal the floor joist bays under the cantilever.

Right – Cantilever has been properly insulated, air sealed, and cavity has been blocked.

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Air seal the top, bottom, and sides of a cantilevered floor cavity and ensure that insulation is in full contact with all sides without voids.

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Cantilevered Floor

Guide

Guide describing how to air-seal and insulate a cantilevered floor.