- Radon mitigation reduces indoor radon concentrations to safe levels through sub-slab depressurisation, ventilation improvements, and sealing of entry points.
- Professional mitigation system design ensures the correct approach for each building’s specific construction type and radon entry routes.
- Sub-slab depressurisation is the most effective and widely used mitigation technique, using an extraction fan to draw radon from beneath the floor slab and vent it safely above the roofline.
- Post-installation radon testing confirms that the mitigation system has successfully reduced radon levels below the action threshold.
- Mitigation systems require periodic inspection and maintenance to ensure continued effective operation.
- Bestcare Facilities Management provides professional radon mitigation system design and installation services across Nairobi and Kenya.
When radon testing confirms that indoor radon concentrations in a building exceed safe thresholds, professional mitigation is required to protect occupants from long-term exposure. The good news is that radon mitigation is a well-established, highly effective discipline — in the vast majority of cases, radon levels can be reduced by 80 to 99 percent through the installation of an appropriate mitigation system. The key is selecting and installing the right system for the building’s specific construction type, foundation design, and radon entry pathways.
Radon mitigation does not remove radon from the soil — it prevents radon from entering the building or dilutes radon that does enter to safe concentrations. The most effective approach in most Kenyan building types with concrete ground floor slabs is sub-slab depressurisation, which creates a zone of negative pressure beneath the slab that draws radon away from the building before it can enter. This is combined with sealing of visible entry points and, where needed, improvements to the building’s natural or mechanical ventilation.
Types of Radon Mitigation Services
Sub-Slab Depressurisation (SSD) installs a suction pipe through the floor slab into the aggregate layer below, connected to a radon extraction fan mounted outside the building that continuously draws radon from beneath the slab and vents it safely above the roofline. This is the most effective mitigation method for slab-on-ground construction.
Sump System Depressurisation uses an existing or newly installed drainage sump as the suction point for the extraction system, particularly effective in buildings with rubble-filled or permeable subfloor voids.
Crawl Space Ventilation improves or installs mechanical ventilation in subfloor crawl spaces to dilute and disperse radon before it enters the living space above.
Positive Pressure Ventilation (PPV) introduces fresh air into the building at a controlled rate, maintaining a slight positive pressure that inhibits radon ingress through foundation gaps and cracks.
Entry Point Sealing systematically seals cracks in floor slabs, gaps around service pipe penetrations, construction joints, and other radon entry points using appropriate sealants, reducing radon ingress in combination with ventilation-based mitigation.
Estimated Cost of Radon Mitigation Services in Kenya
| Service | Unit | Estimated Cost (KES) |
|---|---|---|
| Radon mitigation system design | Per property | 15,000 – 40,000 |
| Sub-slab depressurisation installation | Per property | 50,000 – 150,000 |
| Sump system installation | Per property | 40,000 – 120,000 |
| Crawl space ventilation improvement | Per property | 30,000 – 100,000 |
| Positive pressure ventilation system | Per property | 40,000 – 120,000 |
| Entry point sealing | Per property | 15,000 – 50,000 |
| Post-mitigation radon test | Per test | 10,000 – 25,000 |
| Annual mitigation system inspection | Per system | 8,000 – 20,000 |
Note: Costs depend on building size, construction type, and mitigation system required. Contact Bestcare Facilities Management for a site-specific quotation.
Contact Information
| Detail | Information |
|---|---|
| Company Name | Bestcare Facilities Management |
| Phone | 0709 004 600 |
| Address | Mpaka Plaza, Westlands, Nairobi |
| info@bestcareservices.co.ke | |
| Website | www.bestcareservices.co.ke |
Contact us today for professional radon mitigation system installation services.