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Radon mitigation systems are most easily installed at the time of building construction. More importantly, a radon mitigation system installed at time of construction will be more effective than a retrofit system. A principal determinant in the success of sub-slab depressurization system is the connectivity of the material (often gravel) below the floor slab. At the time of design/construction, consideration can be made to ensure that no part of the sub-slab is compartmentalized (i.e., cut-off by footings). Other relatively inexpensive measures such as running a loop of perforated pipe around the interior footing can greatly improve the performance of a sub-slab depressurization system. The system can be roughed-in and capped. If subsequent testing shows elevated radon levels, the infrastructure can be made “active” through the installation of a fan.

Whether or not consideration of radon mitigation is required by your Municipality’s building department, it is economical to consider roughing-in a system at the time of construction. CSL is certified as a Controlling Radon in New Canadian Homes installer. We would be pleased to help guide you through design and installation of a radon mitigation system.


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