Radon Barrier
How Insulthane® Extreme works under the slab to protect homes from radon gas
Radon Protection with Spray Foam Insulation
Insulthane® Extreme closed-cell spray polyurethane (ccSPF) foam offers a reliable, UL-Evaluated radon barrier solution, creating a seamless barrier that effectively blocks radon while providing added insulation and moisture protection. Since radon is invisible and undetectable without specialized equipment, it’s essential for homeowners to be aware of its presence and take necessary precautions.
Spray Foam Radon Barrier for New Construction
When used in under slab applications, Insulthane Extreme creates a strong, airtight barrier to keep radon out, while being faster to install and creates less waste compared to traditional XPS board systems. Plus, ccSPF insulation meets the National Building Code standards for radon gas control.
How Insulthane Extreme Works
In under-slab applications, Insulthane Extreme ccSPF insulation forms a durable, seamless barrier to block radon.
Seamless Air Barrier
Sprayed directly under your home’s slab, forming a tight, continuous air barrier that blocks radon from entering.
Strong & Durable
Its rigid structure and high compression strength supports heavy loads, maintaining durability over time.
Moisture Protection
Acts as a moisture barrier and prevents the slab from freeze/thaw damage, keeping your home protected in all weather conditions.
How does Spray Foam Insulation Compare?
Comparing the key differences between Insulthane Extreme and traditional XPS (Extruded Polystyrene) Systems for under slab radon protection
| Feature | Insulthane Extreme ccSPF | XPS |
|---|---|---|
| Installation Time | Fast spray application, no cutting or taping required | Requires cutting and taping of individual boards |
| Material Efficiency | Spray application that accurately covers the intended space | Creates extra waste when adjusting boards for pipes, footings, and edges |
| Vapour Barrier | Built-in vapour barrier | Requires additional vapour barrier installation |
| Coverage | Continuous, airtight barrier, including around penetrations | Can leave gaps between boards causing potential air leakage |
| Labour | Reduces labour with easy spray-applied installation | Labour-intensive, requiring precise cutting and taping of boards |
| Durability | High R-values reduce freeze/thaw damage, protecting the slab | Lower R-values and seams increase freeze/thaw damage risk |
How does radon enter a home?
Radon is present throughout the country and can find its way into buildings through cracks in floors, walls, foundations, and around pipes and penetrations.
Radon entry points:
- A) Gaps around service pipes
- B) Gaps around floor drains and plumbing pipes
- C) Sump Basket
- D) Cracks in floors
- E) Cracks in walls
- F) Joints between floor and wall
- G) Water supply
UL-Evaluated Radon Barrier
Insulthane Extreme is a trusted UL-evaluated radon barrier system that provides a seamless thermal and vapour barrier in one application. Not only are you meeting code requirements, but you’re also ensuring long-term protection, boosting energy efficiency, and simplifying your construction process.
Talk to an Expert
Chat with a member of our team to see how Insulthane Extreme can fit your project.