It simultaneously acts as an underslab insulation (R-10 min.), and provides a capillary break all in a single panel. Radon Guard enters the market as a first-of-its kind product incorporating a ventilation pipe and a soil-gas retarder to vent away radon and other dangerous gases while also benefiting from the thermal insulation properties and high compressive-strength of light-weight molded polystyrene (MPS) foam.

Radon is an odorless, tasteless, toxic gas that comes from the natural decay of uranium within rock and soil that seeps through the ground and into a building or home’s foundation. Radon Guard is recognized in UL Evaluation Report 11812-06 as a code compliant replacement for a 4-inch-thick granular fill material. Radon Guard presents an easy to install, cost-effective, code-compliant mitigation strategy well-suited to any new construction application.

Using a series of interconnected channels on the bottom of the Radon Guard panel, subsurface gases are directed to the ventilation pipe and safely directed outside. The channels provide a capillary break that allows water to move freely beneath the slab toward drainage while also venting out water vapors. The high compressive-strength of MPS allows Radon Guard to support structural loads of up to 390 psf. MPS’ exceptional insulating properties also enhances the building envelope, improves the performance of radiant floor heating systems, and contributes to LEED points.

AFM Corporation
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