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Right - Rigid foam slab edge insulation is installed along the exterior edge of a monolithic slab foundation.

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Rigid Foam Insulation Installed over Existing Foundation Slabs

Guide

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

Rigid foam forms an insulating bond break between the foundation wall and the slab

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Spray foam extends down the inside of the foundation wall to the uninsulated slab; because the wall lacked exterior perimeter drainage, the slab was cut and an interior footing drain was installed.

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Spray foam insulation extends down the foundation wall to the slab, which has been retrofitted by cutting the slab to install drainage mat against the wall and a new perimeter footing drain, along with rigid foam plastic above the slab.

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New Whole-House Solutions Case Study: Exterior Rigid Foam Insulation at the Edge of a Slab Foundation, Fresno, California

Case Study

Case study describing application of exterior rigid foam insulation on a foundation system.

Spray foam extends down the foundation wall to the slab, which has been retrofitted by adding dimple plastic drainage mat and rigid foam insulation.

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Concrete Slab over Polyethylene

Video

Video describing concrete slab over polyethylene barrier.

Spray Foam Interior Insulation for Existing Foundation Walls

Guide

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

BSC Information - Slab Edge Insulation for All Climates, Sheet 513

Reference

Information sheet about insulating slabs.

Passive House Geofoam Foundation Installation: Karuna Video #1

Video

Video showing the installation of a foundation in a passive house.

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

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Right - Retrofit of an existing basement slab by adding dimple plastic mat, rigid foam insulation, and a floating subfloor.

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Rigid insulation and water control layers are installed on the exterior of a flat foundation wall; spray foam insulates the rim joist

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Passive House Underslab Foam & Vapor Barrier: Karuna Video #6

Video

Video describing the under slab and vapor barrier used on a passive house.

Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

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Insulation Installation Achieves RESNET Grade 1

Guide

Guide describing RESNET Grade 1-level installation of insulation in walls, attics, and floors.

Achieving Ducts in Conditioned Space

Reference

Fact sheet describing best strategies to bring ductwork on single-story homes with a slab-on-grade foundation in hot, dry climates into the conditioned envelope of the home intending to highlight the pros and cons of multiple ductwork integration strategies, including traditional duct systems in...