The 2024 Ontario Building Code (OBC) introduced significant updates to how new homes must be built with respect to radon protection — and if you're building, buying, or developing new homes in Windsor or Essex County, this directly affects you.
What Changed in the 2024 Ontario Building Code?
The updated OBC now requires that all wall, roof, and floor assemblies in contact with the ground be constructed to resist the leakage of soil gas — including radon — from the ground into the building. This is a major step forward from previous requirements which were far less comprehensive.
Builders are now required to incorporate radon-resistant construction measures including:
- Proper sealing of all penetrations through the foundation
- Granular material (such as gravel) beneath the floor slab to allow gas movement
- A gas-permeable layer below the slab
- Provisions for a sub-slab depressurization system — rough-in piping that makes it easy to install an active system later if needed
Why Does This Matter for Builders and Developers?
For builders and developers in the Windsor area, these code changes are both a compliance requirement and a genuine marketing opportunity. Homes built with proper radon protection are:
- More marketable to informed buyers — especially those who've done their research
- More valuable — buyers increasingly factor radon into purchase decisions
- Less likely to require expensive remediation after purchase
- Better positioned in a competitive real estate market
Working with a radon professional during the construction phase is significantly more cost-effective than retrofitting a mitigation system after the fact. Getting it right from the start protects your buyers and your reputation.
What About Existing Homes?
The Ontario Building Code applies to new construction only — it does not require retrofits in existing homes. If you live in an older home, the responsibility is yours to test and mitigate if needed.
This is particularly relevant in Windsor and Essex County, where many homes were built before radon was well understood as a health risk. If you've never tested your home, now is a great time to start.
How Home Radon Relief Can Help
Whether you're a builder looking to meet the new OBC requirements on your next project, or a homeowner in an existing home who wants to understand your radon risk — Home Radon Relief is here to help. We offer free consultations, professional mitigation system installation, and new construction radon protection services throughout Windsor and Essex County.