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Radon Guard™ Insulation
The key component for a radon gas mitigation system





Radon Guard™ insulation is a patent-pending sub-slab depressurization
panel. Radon Guard allows for soil gas removal, insulates the concrete
slab and provides a capillary break between the ground and the air barrier
system.

• CCMC Evaluation Report 13698-R confirms that the interconnected
channels on the underside of Radon Guard insulation provide the required
means to direct soil gas to a radon gas mitigation system.

• Radon Guard insulation panels installed under a concrete slab allow
for the collection of radon gas within the sub-slab space to that it can
then be exhausted through a radon mitigation system rather than
entering the building.

Radon Guard insulation is the code compliant one-to-one replacement
for a 100 mm thick layer of granular material, the prescriptive solution
required by building codes.





The table below provides material properties for Radon Guard insulation meeting CAN/ULC-S701, Type 2. Radon
Guard insulation is available in other types to meet specific structural load requirements.

CAN/ULC-S701
Material Properties1
Test Method Units Property Values
Thermal Resistance
Minimum RSI per 25 mm (R per inch)
ASTM
C518
m20C/W
(ft2•h•0F/BTU)
0.70
(4.04)
Compressive Resistance
Minimum @ 10% Deformation
ASTM
D1621
kPa
(psi)
110
(16)
Flexural Strength
Minimum
ASTM
C203
kPa
(psi)
240
(35)
Water Vapour Permeance
Maximum
ASTM
E96
ng/(Pa.s.m2)
(Perms)
200
(3.5)
Water Absorption
Maximum
ASTM
D2842
% By volume 4.0
Dimensional Stability
Maximum, 7 Days @ 70 ± 2 ℃
(158 ± 4°F )

ASTM
D2126
% Linear Change 1.5
Limiting Oxygen Index
Minimum
ASTM
D2863
% 24

1CAN/ULC-S701, Standard for Thermal Insulation, Polystyrene, Boards and Pipe Covering is the National Standard of Canada for moulded expanded polystyrene (EPS) insulation. Material properties are certified under a listing and certification program monitored by Intertek Testing Services.