Imagine discovering that an invisible, odorless gas could be quietly seeping into your home—one that’s known to cause lung cancer and is responsible for thousands of deaths each year. That’s the reality many homeowners face when they hear the words “radon leak.”
The good news? While radon exposure is a serious health risk, fixing most radon leaks is often simpler and more affordable than people think. With the right maintenance and a few strategic repairs, you can protect your family, prevent panic, and avoid costly overhauls.
In this article, we’ll break down what causes radon leaks, how to spot the warning signs, and how simple repairs can restore safety and peace of mind.
What Is Radon—and Why It’s a Hidden Threat
Radon is a radioactive gas that forms naturally when uranium in soil and rock breaks down. It moves upward through the ground and can enter your home through cracks, gaps, and foundation joints.
Because it’s invisible, tasteless, and odorless, most homeowners don’t know it’s there until they perform a radon test—or experience a system malfunction.
Over time, exposure to high radon levels can lead to lung cell damage and increase your risk of lung cancer. In fact, the EPA estimates radon causes about 21,000 deaths per year in the U.S. alone.
That’s why having a properly working radon mitigation system—and maintaining it—is essential for your family’s health.
Why Homeowners Are Suddenly Panicking About Radon Leaks
Radon leaks have become a growing concern as more homeowners install mitigation systems but fail to maintain them properly.
A small malfunction, like a dead fan or a loose pipe, can make an entire system ineffective. In some cases, homeowners discover dangerously high radon levels years after installation—simply because they assumed their system was working.
Common causes of radon leaks include:
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Cracked or disconnected PVC pipes
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Worn-out or non-functioning fans
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Poor sealing around the suction point or sump pit
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Electrical outages that go unnoticed
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Improper venting or blocked exhaust outlets
When these problems go unchecked, radon gas seeps back into the home—causing fear, confusion, and sometimes unnecessary system replacements.
Don’t Panic—Here’s Why Most Radon Problems Are Easy to Fix
While the thought of a radon leak is scary, the truth is that many problems are simple and inexpensive to resolve. You just need to know where to look and what to check.
1. Check the Manometer for an Easy Clue
The manometer, a U-shaped gauge filled with colored liquid, tells you whether your fan is creating suction.
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Uneven levels = the fan is working properly.
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Even levels = the fan may not be running.
✅ Quick Fix:
Check if the fan is plugged in and the breaker is on. If the outlet is working but the fan is silent, it may need replacement—a process that typically costs $300 to $800, including labor.
2. Inspect the Fan for Power and Performance
Your radon fan should run continuously and quietly. If it’s silent, buzzing, or rattling, it could mean:
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The fan motor has burned out.
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Moisture or debris has entered the housing.
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Electrical wiring has failed.
✅ Quick Fix:
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Check for loose connections.
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Clean around the fan intake and outlet.
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Replace aging fans (most last 5–10 years).
Replacing a fan is one of the most common and cost-effective radon repairs—and it immediately restores full system performance.
3. Look for Cracks or Gaps in Pipes
PVC vent pipes must be airtight to safely channel radon from beneath your foundation. Cracks, disconnections, or poorly glued joints can cause gas to leak back inside.
✅ Quick Fix:
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Seal small gaps with radon-safe silicone caulk.
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For larger cracks or loose fittings, use PVC cement or call a professional for a permanent repair.
These repairs usually cost between $100 and $400, depending on the extent of the damage.
4. Clear Blocked or Frozen Exhaust Vents
If your system’s exterior vent becomes blocked by leaves, snow, or nests, airflow drops and radon gas can accumulate.
✅ Quick Fix:
Inspect the outside vent monthly. Remove any debris and make sure the vent pipe is at least 12 inches above the roofline.
Adding a vent guard or weather hood can help prevent future blockages.
5. Watch for Condensation or Water Build-Up
Moisture inside radon pipes can cause gurgling sounds, reduce suction, or even damage the fan.
✅ Quick Fix:
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Wrap pipes with insulation to prevent condensation.
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Check that the vent slopes slightly downward to allow proper drainage.
If you see standing water or mold, call a professional to drain and reseal the system.
6. Retest Your Radon Levels Regularly
Even after repairs, you’ll need to confirm that your system is effectively keeping radon below 4.0 pCi/L, the EPA’s recommended limit.
✅ Quick Fix:
Use a short-term test kit or install a digital radon monitor for continuous readings. Testing costs between $20 and $50—a small price for peace of mind.
7. Don’t Ignore Foundation Cracks
Radon often sneaks in through new cracks in your concrete slab or basement floor. Even if your mitigation system is running, unsealed cracks can undermine its effectiveness.
✅ Quick Fix:
Seal cracks and gaps using urethane or polyurethane sealant. This simple task can significantly reduce radon entry and improve system performance.
How Much Do Radon Repairs Typically Cost?
One reason homeowners panic over radon leaks is the fear of expensive repairs. But in reality, most fixes are affordable compared to full system replacements.
| Repair Type | Average Cost (USD) | Description |
|---|---|---|
| Fan replacement | $300–$800 | Most common repair, restores full suction |
| Pipe sealing or repair | $100–$400 | Fixes cracks or disconnections |
| Moisture control/insulation | $150–$350 | Prevents condensation and freezing |
| Electrical repair | $100–$250 | Restores power to fan or switch |
| Short-term radon test | $20–$50 | Confirms system performance |
| Full system replacement | $1,000–$2,500 | Only if the old system is beyond repair |
By addressing small issues early, you can avoid the larger expense of replacing the entire mitigation system later.
When to Call a Professional
Some radon issues—especially electrical or pressure-related ones—require the expertise of a certified radon mitigation contractor.
Call for professional help if:
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The fan doesn’t start after power checks.
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Radon levels remain high despite repairs.
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You find major cracks, water leaks, or damaged suction points.
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Your system is over 8 years old and starting to show wear.
Professionals use specialized equipment to test pressure, detect leaks, and ensure your system meets EPA standards.
Why Simple Maintenance Prevents Major Headaches
Regular maintenance not only keeps your system effective but also extends its lifespan and prevents panic moments.
Here’s what you can do:
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Check your manometer monthly.
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Inspect the fan and vent for noise or obstructions.
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Retest radon levels annually.
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Keep records of maintenance and test results.
These simple habits ensure that small issues are caught before they turn into costly or dangerous problems.
The Real Cost of Doing Nothing
Ignoring a malfunctioning system can have serious consequences. Radon doesn’t cause immediate symptoms—but over months or years, it silently increases your risk of lung cancer.
The emotional and financial toll of untreated radon exposure is far greater than the cost of simple preventive care.
Conclusion: Stay Calm and Take Control
Radon leaks can sound terrifying—but they’re entirely manageable with awareness, quick action, and regular maintenance. Most issues come down to minor fan, pipe, or power problems that can be fixed for a fraction of what homeowners expect.
By staying proactive—checking your system, testing regularly, and making timely repairs—you’ll keep your air safe, your family healthy, and your repair costs low.
So, don’t panic. With the right attention and a few smart fixes, your radon mitigation system can keep doing what it was designed to do—protect you, quietly and reliably, for years to come. For expert diagnosis, repair, or system maintenance, contact Colorado Springs Radon.
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