The environmentally friendly Legalett Heated Slab Foundation construction technique is a proven effective tool against Radon Gas. The Legalett System is already recognized as the Radon-Proof Foundation of Choice in Europe!

​How Does GEO-Slab Prevent Radon Gas?

The Legalett System, as is, becomes a continuous radon barrier under the dwelling for a number of reasons:

• There is no separation of footing / foundation and floor - the slab is continuous throughout, and thus there is no continuous crack around the perimeter for radon to leak through.
• Elimination of cracks in the floor - since the slab is 7-8" thick, and has heavy mesh top and bottom, the only cracks in the floor (ever) are simply very minor hairline shrinkage cracks which don't extend through the slab - they are only visible at the very surface. Thus the slab is a uniform, complete air (and thus radon) barrier.  This is in stark contract with thinner slabs, which typically have wide cracks  in them, which are not airtight.
• Ease of sealing penetrations - since the concrete is 7-8" thick, there is lots of depth to properly seal any penetrations to the air-tight slab, instead of hoping that you are sealing to a thin, cracked slab.
• Elimination of dependence on an air barrier to provide radon-proofing - since the slab itself is the air barrier, you are not relying on an easily punctured plastic air barrier to be the radon proofing - instead, you have a durable, thick, permanent air barrier.

Radon Gas Resource Links

For more information on Radon Gas, check out the following publications:

• RADON: A Guide for Canadian Homeowners  (by the Canadian Mortgage and Housing Corporation)

• It's Your Health: Testing Your Home for Radon (by the Government of Canada)

• EPA Publications on Radon Gas (by the US Environmental Protection Agency)

• Quick Links:

• How Legalett's Frost Protected Shallow Foundations & Air-Heated Radiant Floor System Works
• Benefits of the Legalett GEO-Slab System
• How GEO-Slab Eliminates Mold & Mildew
• Green Features of Legalett Products
• Advantages for Developers & Commercial Building Owners
• Advantages for Schools & Daycare Facilities
• Advantages for Government & Institutional Buildings
• Advantages for Retirement Communities & Elder Care Facilities

​Get a Quote Here