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Results of Testing the Comparison of Radon Infiltration through "Radon Guard™" and Prescriptive Gravel

Property

Rn Concentration in Dosing Compartment (kBq/m3)

Rn Concentration in Receiving Compartment (Bq/m3)

Result

Floor assembly with Radon Guard™

4.58

48.79

Radon Guard™ is comparable to gravel in terms of radon infiltration under the test conditions.

Floor assembly with gravel

4.27

35.59

Results of Testing the Comparison of Pressure Communication through "Radon Guard™" and Gravel

Property

Flow Rate Through Exhaust Fan (cfm)

Pressure Under Floor Panel (Pa)

Pressure Under Radon Guard™ (Pa)

Pressure in Sand Layer (Pa)

Pressure in Dosing Compartment (Pa)

Result

Floor assembly with Radon Guard™

38.4

−1.1

−1.7

−2.1

−28.6

Radon Guard™ is comparable to gravel in terms of sub-slab pressure communication under the test conditions. This result demonstrates that the product is able to serve as a sub-slab gas permeable layer as comparable to prescriptive gravel.

Floor assembly with gravel

38.7

−0.9

−1.4

−2.0

−29.2