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Guide describing how to insulate a floor over an uninsulated basement or crawl space.

Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.

Guide describing steps to take to minimize indoor humidity during cold winter weather.

Guide describing how to properly apply mulch to landscaping for water retention and erosion control.

Vapor retarder plastic should not be installed over fibrous insulation on basement or crawlspace walls; rigid foam or spray foam should be installed directly against the concrete, behind the blanket insulation.

Guide describing how to slope solid surfaces outside of a home so rainwater flows away from the home.

Guide describing methods for installing pest-resistant ground cover around foundations to resist borrowing rodents and other pests.

Information guide describing things to consider when considering home retrofits in the basement or crawlspace including HVAC, wiring, or structural systems.

Guide describing ways builders can block off entry points and otherwise make homes inhospitable to all manner of pests.

Guide describing different options for providing seismic and thermal resistance for homes with 'cripple' wall crawlspace foundations, which are known for their instability.

Guide describing principles of insulating and air sealing band joists as a stand alone energy upgrade, or as part of creating a closed crawlspace.

Guide describing how to insulate closed crawlspace walls and band joist areas with rigid foam board insulation.

Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.

Guide describing how to construct and retrofit homes built on slab-on-grade foundations in earthquake-prone areas to withstand seismic forces by properly installing wall-to-foundation connections.

Information guide describing steps that builders can take to reduce the likelihood of standing water and localized flooding around the foundation of a home during rainy conditions.

Guide describing how to insulate slabs on grade in climate zones 3 and higher.

Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.

Guide describing how to install an airtight cover on a sump pump in the basement or crawlspace of a home to minimize humidity in the home.

Guide describing the use of swales, French drains, and site grading to minimize saturation of foundations and ponding of stormwater runoff on sites.

Guide describing techniques and measures for increasing the termite resistance of a home's foundations.

Information guide providing R-Values and vapor retarder classifications for common insulation materials.

Guide describing method for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls.

Guide describing how to insulate the sill beam or sill plate on the exterior side in a way that allows drying to the exterior, as part of an exterior wall upgrade.

Guide describing how to retrofit an existing basement floor or slab to reduce moisture issues.

Foundations, Floors, and Site

Insulating and Air Sealing Existing Floors above Unconditioned Spaces

Insulating Crawl Space Floors in Existing Homes

Managing Indoor Humidity and Ventilation in Cold Weather

Mulching

No Vapor Retarders on Interior Side of Air-Permeable Foundation Insulation

Patio Slabs, Porch Slabs, Walkways, and Driveways Slope Away from House

Pest-Resistant Ground Cover at Foundation Perimeter

Pre-Retrofit Assessment of Crawlspaces and Basements

Reduce Pest Intrusion

Retrofit Existing Crawl Space Foundations with Cripple Walls to Increase Seismic Resistance and Thermal Performance

Rigid Foam Board Insulation for Existing Band Joists

Rigid Foam Board Interior Insulation for Existing Foundation Walls

Rigid Foam Insulation Installed over Existing Foundation Slabs

Seismic and Thermal Resistance in Slab-on-Grade Foundations with Turned-Down Footings (Monolithic Slabs)

Site Drainage Practices to Minimize Localized Flooding

Slab Edge Insulation

Spray Foam Interior Insulation for Existing Foundation Walls

Sump Pump Cover Gasket

Swales, Drains, and Site Grading for Stormwater Control

Termite-Resistant Foundations and Walls

Typical R-values and Vapor Retarder Classifications for Common Insulation Materials

Unvented, Insulated Crawlspaces

Water Managed Existing Sill Beams and Sill Plates

Water Management of Existing Basement Floor

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Foundations, Floors, and Site