BASC Search | Building America Solution Center

Wrong – Cantilever is not blocked or insulated.

Image

Batt insulation is not an effective air barrier

Image

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

Image

Wrong – Insulation is misaligned with floor above

Image

Right – Insulation is in contact with floor above

Image

Wrong - This batt insulation is not aligned with the subfloor and joists.

Image

Wrong - Sub-floor insulation is not properly installed or supported.

Image

Right - Sub-floor insulation is properly installed and supported.

Image

Wrong - Sub-floor insulation has gaps, compression, and misalignment.

Image

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

Image

Air seal the floor above an unconditioned basement or crawlspace and make sure floor insulation is in full contact with the underside of the subfloor.

Image

Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall

Image

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.

Image

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.

Image

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.

Cantilevered Floor

Guide

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

Air Sealing Duct and Flue Shafts

Guide

Guide describing how to air-seal duct and flue shafts.

Advanced Framing: Minimum Wall Studs

Guide

Guide describing how to frame a wall with minimal wall studs to prevent heat losses and gains through walls.