BASC Search | Building America Solution Center

Band joist insulation and air sealing

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

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

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

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

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

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

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

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

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Rigid foam insulation and a thin slab were installed over the dirt and gravel of this sealed crawlspace

Rigid foam insulation and a thin slab were installed over the dirt and gravel of this sealed crawlspace

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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.

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.

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Floor Above Unconditioned Basement or Vented Crawlspace

Guide

Guide describing how to air-seal and insulate the floor above an unconditioned basement or crawl space.

Water Management of Existing Crawlspace Floor

Guide

Guide providing information about treating bulk water drainage issues and moisture control measures in existing basements and crawl spaces.