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Foundations & Floors


Solution Center Guides


This guide describes IECC 2009 and ENERGY STAR Certified Homes insulation requirements.

This guide describes IECC 2012 and DOE Zero Energy Ready Home insulation requirements.

Guide describing how to insulate a basement to improve the overall thermal performance of the building and provide more dry, usable conditioned space for home occupants and for HVAC equipment.

Guide describing ways to air seal an attached garage in new and existing homes.

Guide describing how to air seal electrical wiring throughout a home.

Guide describing how to air seal the gap between the drywall shaft wall (i.e., common wall) and the structural framing between units in multifamily housing.

Guide describing how to air seal around plumbing and other piping.

Guide describing how to air seal sill plates in new and existing homes.

This case study presents a cold-climate project that examines an alternative approach to ground source heat pump (GSHP) ground loop design. The innovative ground loop design is an attempt to reduce the installed cost of the ground loop heat exchange portion of the system by containing the entire ground loop within the excavated location beneath the basement slab.

Information guide providing background information about air flow in residential buildings.

Information guide providing background information about heat flow in residential buildings.

Information guide providing background information about moisture flow in residential buildings.

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

Guide describing how to install a capillary break to help manage moisture in foundations.

Guide describing how to create a capillary break at all crawlspace floors using polyethylene sheeting to manage moisture in crawlspaces.

Guide describing how to install a capillary break under a slab foundation using either polyethylene sheeting or rigid insulation installed over aggregate or over sand and geotextile matting.

Guide describing appropriate flooring for wet areas of the home.

Guide describing how to apply water management strategies to below grade walls.

Guide describing installation of sump pumps in the basement or crawlspace of a home.

Guide describing how to install slab edge insulation when retrofitting existing slab-on-grade foundations.

Guide describing how to insulate a new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.

Guide describing how to properly grade a site so water will not saturate the soil, and penetrate into the foundation.

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.

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

Guide describing how to help drain water away from the perimeter footing.

Guide describing the air sealing of rim joists on walls connecting homes and attached garages.

Guide describing the installation of gutters, downspouts, and alternate options for managing rainwater run-off from roof.

Guide describing how to conduct a home performance assessment before beginning retrofit projects in existing homes.

Guide illustrating how to insulate a floor over unconditioned space with conditioned space above by adding insulation and air sealing.

Guide describing how to upgrade a wall with a floor overhang (or cantilever) on an existing home by adding rigid insulating sheating and or closed-cell spray foam insulation and air sealing.

Guide with information about how to upgrade a garage ceiling when a portion of the interior of the house is located directly above the attached garage by adding insulation and air sealing.

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

This guide describes RESNET Grade 1 level installation of insulation in walls, attics, and floors.

Vapor retarders can be a crucial part of the building envelope and can help manage moisture issues to keep the home dry. However, before installing a vapor retarder, installers must be aware that in some instances vapor retarders can increase the likelihood of condensation issues.

Guide describing how to correctly choose building materials.

Guide describing how to correctly slope surfaces outside a home to force water to flow away from the edge of the home.

Information guide describing how to assess crawlspaces and basements before proceeding with upgrades in existing homes.

Guide describing ways to reduce access to bugs, rodents and other pests through openings in a home.

Guide describing principles of insulating 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 insulate slabs on grade in climate zones 4 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 the need for covers on sump pumps in the basement or crawlspace of a home.

Guide describing methods for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls to provide an insulated space for HVAC equipment.

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.

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