Assess
We review your foundation, sump, drains and finished areas, and agree the pipe route and fan location with you.
Radon mitigation
A quiet system that keeps radon out, for good
If your long-term result is above 200 Bq/m³, we design and install an active soil depressurization system for your foundation, built to CAN/CGSB-149.12, at a fixed price, and we guarantee the result.
How it works
We flip the pressure under your house
Radon gets in because your home is at slightly lower pressure than the soil beneath it. A sub-slab system reverses that.
A fan connected to a pipe through the slab keeps the gravel and soil under the house at lower pressure than the basement. Instead of seeping in through cracks and drains, radon is pulled into the pipe and released outdoors, where it quickly dilutes.
- Suction point
A 4–5 inch core through the slab with a small pit beneath it.
- Sealed entry points
Airtight sump lid, major cracks, floor–wall joints and drains.
- Vent pipe
Sealed pipe on a route you approve before we start.
- Manometer
A simple gauge so you can see the system working at a glance.
- Fan
Energy-efficient, outside the living space, running quietly 24/7.
- Discharge
Radon released outdoors where it can’t re-enter the home.
Install day
What happens, start to finish
Measure
A communication test measures how far suction spreads under the slab, so the system is sized to your house, not guessed.
Install
Core, pit, pipe, fan and sealing. Most homes take one day. We protect floors and clean up as we go.
Verify
We confirm suction across the slab, label the system, and set up your follow-up test.
Our guarantee
Below 200, or we come back. Free.
If your follow-up long-term test comes back at or above 200 Bq/m³, we return and adjust or upgrade the system at no cost until it doesn’t. Conditions apply. How it works
- Fixed price agreed before we start
- Designed and installed to CAN/CGSB-149.12
- C-NRPP certified mitigation professionals
- Fan and workmanship warranties in writing
- Documentation for resale and warranty files
Every kind of house
Systems for the foundations we see in Southern Ontario
Poured basements
The classic sub-slab system: one or more suction points, sealed sump, pipe routed through a closet, garage or exterior wall.
Stone & block foundations
More openings mean more sealing, sometimes a second suction point, and block-wall depressurization where needed.
Crawlspaces & earth floors
A heavy sealed membrane over the soil with suction beneath it, common in cottages and older homes.
Slab-on-grade
Suction through the slab from a closet or garage, with the pipe routed to the attic or outside.
Rough-in activation
Homes built under the 2024 Ontario Building Code: we connect a fan and complete the system, often in a few hours.
Basement suites & multi-unit
Systems that protect both units, with results documented for owners and tenants.
Questions
Radon mitigation FAQ
How long does radon mitigation take?
Most single-family homes are done in one day. Homes with several foundations or crawlspaces can take longer.
How much will my radon go down?
A properly designed sub-slab depressurization system typically reduces radon by 90% or more. We guarantee your follow-up long-term result will be below 200 Bq/m³, or we come back and adjust the system at no cost.
Where does the fan go?
Outside the living space: on an exterior wall, in an attached garage or in the attic. That way a leak in the pipe can never push radon into your home.
Will it be noisy or ugly?
We agree the pipe route and fan location with you before we start, and prefer routes through closets, garages and utility rooms. Most homeowners stop noticing the system within days.
What does it cost to run?
Radon fans typically draw roughly 20 to 90 watts, running continuously: a modest yearly electricity cost, similar to one or two light bulbs.