Sub-Slab Depressurization (SSD) Radon System
EPA’s Most Effective Radon Reduction Method · Licensed Utah Contractors
What Is Sub-Slab Depressurization?
Sub-slab depressurization (SSD), also called active soil depressurization (ASD), is the EPA-recommended, most effective method for reducing indoor radon. It works by creating negative pressure beneath your foundation slab, drawing radon out before it can enter your living spaces and exhausting it safely above the roofline.
When properly installed, SSD systems reduce radon by 90% or more, typically dropping levels well below the EPA’s 4 pCi/L action level.
EPA Recommended:
Preferred radon reduction method per EPA guidelines
90%+ Effective Removal:
Most significant reduction of any mitigation approach
Crawlspace Radon Mitigation
Operates continuously for the life of the home
Crawlspace Radon Mitigation
Operates continuously for the life of the home
Low Cost to Run Radon Fan:
Fan uses ~$15/year electricity
Call (801) 436-7208
SSD vs. Other Radon Reduction Methods
✅
Active SSD System
✅ 90%+ radon reduction
✅ All-weather 24/7 protection
✅ EPA gold standard
✅ Verifiable with manometer
⚠️
Passive System
❌ 30–50% reduction at best
❌ Pressure-dependent
❌ Not reliable alone
⚠️
Ventilation Only
❌ Dilutes, doesn’t remove
❌ Ineffective in winter
❌ High energy cost
How Our SSD Installation Works
1
On-Site Assessment
We assess the oundation type, your radon levels, sub-slab conditions evaluated.
2
Core Drilling Process
3"-4" suction hole drilled through the foundation slab. Sub-slab communication tested.
3
Installation of the pipe & Radon Ran
Insatall 3"-4" Schedule-40 PVC or ABS pipe and routed to radon fan, exiting above roofline.
4
Post Installation Test & Verify
Post-installation radon test confirms levels are below the EPA recommended 4 pCi/L.
