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Slab-on-grade radon control techniques

Slab-on-grade radon control techniques

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Right – The slab is coated with two coats of epoxy paint to minimize moisture transfer through the slab from the ground.

Right – The slab is coated with two coats of epoxy paint to minimize moisture transfer through the slab from the ground.

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Residential Buildings: Foundations

Reference

Website describing the U.S. Department of Energy's residential buildings program.

Technology Fact Sheet Slab Insulation: Improve Comfort and Save Energy in Homes with Slab-on-Grade Floors

Reference

Brochure describing insulation approaches for homes with slab-on-grade floors.

Slab-on-grade with integral grade beam with exterior insulation

Slab-on-grade with integral grade beam with exterior insulation

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There is no polyethylene sheeting installed between the ground and the slab

There is no polyethylene sheeting installed between the ground and the slab

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Slab-on-grade with concrete masonry stem wall and exterior insulation

Slab-on-grade with concrete masonry stem wall and exterior insulation

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Turned down concrete slab - 1 inch rigid insulation

Turned down concrete slab - 1 inch rigid insulation

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Concrete slab over polyethylene sheeting as capillary break

Concrete slab over polyethylene sheeting as capillary break

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

Reference

Information sheet about insulating slabs.

Turned down concrete slab - 3/4 inch rigid insulation

Turned down concrete slab - 3/4 inch rigid insulation

CAD File

Turned down concrete slab - 1 1/2 inch rigid insulation

Turned down concrete slab - 1 1/2 inch rigid insulation

CAD File

Right – Rigid foam is attached to the exterior of this foundation wall.

Right – Rigid foam is attached to the exterior of this foundation wall.

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UAF Cooperative Extension Service: Radon Mitigation in Super-Insulated Slab

Video

Video describing radon precautions taken for a construction project in a high-risk radon area in Alaska.

Right – Apply caulk at the slab-to-wall joint to reduce pest intrusion

Right – Apply caulk at the slab-to-wall joint to reduce pest intrusion

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A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.

A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.

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There is polyethylene sheeting installed to provide a capillary break between the ground and slab

There is polyethylene sheeting installed to provide a capillary break between the ground and slab

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Foundation heat exchanger installed in overcut around a basement wall

Foundation heat exchanger installed in overcut around a basement wall

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Right - Basement slab with a capillary break of either gravel or a drainage mat.

Right - Basement slab with a capillary break of either gravel or a drainage mat.

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Epoxy paint is installed to provide a moisture control layer on the surface of an existing basement slab

Epoxy paint is installed to provide a moisture control layer on the surface of an existing basement slab

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Right - Potential locations for slab-on-grade stem insulation in new construction: slab insulation should always be underneath, with stem walls insulated (a) inside, (b) outside, (c) not at all, or (d) outside with underground extension to repel moisture.

Right - Potential locations for slab-on-grade stem insulation in new construction: slab insulation should always be underneath, with stem walls insulated (a) inside, (b) outside, (c) not at all, or (d) outside with underground extension to repel moisture.

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This house with an insulated slab is protected from pests with a termite shield at the sill plate, borate-treated framing, insect screen covering bottom of furring air gap, and brick veneer over slab-edge insulation

This house with an insulated slab is protected from pests with a termite shield at the sill plate, borate-treated framing, insect screen covering bottom of furring air gap, and brick veneer over slab-edge insulation

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Capillary Break at Crawlspace Floor - Polyethylene Sheeting under Concrete Slab

Guide

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

Capillary Break Beneath Slab - Polyethylene Sheeting or Rigid Insulation over Aggregate or Sand and Geotextile Mat

Guide

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.

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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Right – This wall is constructed with the sill plate overhanging the top of the foundation wall so that when rigid foam is installed on the exterior of the foundation wall, its surface will align with the surface of the wall sheathing.

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The existing slab is retrofitted with epoxy paint, rigid foam insulation, sleepers (furring strips), and subfloor.

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Right-Polyethylene sheeting is correctly installed over aggregate and taped to pillars and foundation wall

Right-Polyethylene sheeting is correctly installed over aggregate and taped to pillars and foundation wall

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Right – The drain slopes away from the foundation and terminates at the proper distance

Right – The drain slopes away from the foundation and terminates at the proper distance

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

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

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