Barrhaven homes are mostly poured-concrete basements with sump pits, which makes sealing the sump one of the first steps.
Longfields, Stonebridge and Half Moon Bay homes get the same process: test in the heating season, then mitigate if the number is high.
Long-term 91-day tests in the heating season, plus short tests for real estate deadlines.
A fan and sealed pipe that draw radon from under the slab and vent it outside, installed in about a day.
Airtight sump lids, sealed floor cracks and membrane over dirt crawlspaces.
A short check after install and a long-term test the next heating season to confirm the result.