Radon mitigation is the process of reducing radon gas levels inside a structure by controlling the pressure beneath the structure and safely venting radon outdoors. Unlike testing and measurement — which diagnose the problem — mitigation is the engineering solution that permanently addresses the source of radon entry.

Radon mitigation systems are designed to:

• Capture radon gas before it enters the living space
• Create a controlled negative pressure environment beneath the structure
• Vent radon safely to the exterior, complying with standards
• Maintain long‑term radon reduction
• Protect your family’s health and your property's value

Because radon is invisible and odorless, a properly designed mitigation system is the only reliable way to ensure indoor radon concentration's average below the action level.

Radon naturally rises from the soil and enters through:

• Foundation cracks
• Sump pits
• Crawlspaces
• Thermal stack affect
• Utility penetrations
• Cold joints and slab seams
• Gaps around plumbing or structural supports

Mitigation systems work by intercepting radon at these intrusion points and preventing it from accumulating indoors.

Every structure is different, so Sage Brush Radon designs systems based on diagnostic data, not guesswork. Below are the primary mitigation methods used in Colorado.

Most common and most effective method for slab‑on‑grade and basement structures

This system creates a vacuum beneath the concrete slab, pulling radon from the soil and venting it safely outside.

SSD includes:

• Drilling a suction point through the slab
• Installing a sealed PVC vent system
• Adding a radon‑rated fan to create negative pressure
• Routing the vent above the roofline
• Sealing accessible slab openings

This method is the gold standard for radon reduction and is effective in the vast majority of Colorado homes.

Used for crawlspaces

A durable, sealed vapor barrier is installed over the soil, and a fan‑driven vent system pulls radon from beneath the membrane.

SMD is essential when:

• The home has exposed dirt crawlspaces
• The crawlspace is vented or unconditioned
• Soil gas intrusion is significant

This method dramatically reduces radon entry from open soil areas.

If a structure has a sump pit, it can be integrated into the mitigation system by:

• Sealing the sump lid
• Connecting the pit to the vent system
• Using the pit as a primary suction point

This approach is highly effective because sump pits often act as major radon entry points.

Some structures require a hybrid approach, such as:

• SSD + SMD
• SSD + block‑wall depressurization
• Multiple suction points
• Enhanced diagnostics for complex foundations

Sage Brush Radon designs systems based on measurement data, not one‑size‑fits‑all solutions.

A typical mitigation installation includes:

• Diagnostic pressure testing
• Identifying optimal suction points
• Core drilling through slab or foundation
• Installing sealed PVC venting
• Mounting a radon‑rated fan (exterior or attic)
• Routing the vent above the roofline
• Sealing accessible entry points
• System labeling and code compliance
• Post‑mitigation radon testing

Most systems are installed in 3–6 hours, depending on home complexity.

A properly engineered system should:

• Reduce radon levels below 4.0 pCi/L (EPA action level)
• Run continuously and efficiently 
• Have a clearly readable manometer or monitoring device
• Be installed according to ANSI/AARST standards
• Be designed specifically for the structure's foundation type

Sage Brush Radon follows all Colorado licensing requirements under HB21‑1195, including NRPP certification, DORA licensing, and adherence to national radon standards.

DIY sealing or patching concrete does not solve radon problems. Radon mitigation requires:

• Pressure diagnostics
• Proper fan sizing
• Correct vent routing
• Sealed suction points
• Compliance with Colorado radon regulations

A poorly designed system can fail to reduce radon — or even make levels worse.

Radon often becomes a concern late in real‑estate transactions. Sage Brush Radon provides:

• Priority scheduling for real‑estate deadlines
• Fast installation timelines
• Post‑mitigation verification testing
• Documentation for buyers, sellers, and agents
• Guidance on seller credits and post‑closing installs

We ensure radon never becomes a deal‑breaker.

Choosing Sage Brush Radon means:

• A system engineered specifically for your home
• Compliance with Colorado radon laws and standards
• Long‑term protection for your family
• Increased home value and buyer confidence
• A quiet, efficient, low‑maintenance system
• Peace of mind backed by certified professionals

Whether you’re:

• A seller needing fast testing or mitigation before listing
• A buyer wanting assurance before moving into your new investment
• A real estate agent managing deadlines and client expectations
• A homeowner navigating seller credits for post‑closing installation

Sage Brush Radon provides the expertise, communication, and reliability needed to keep your transaction moving forward without added stress.

If you have questions about your specific situation, reach out as early as possible. We’re here to help you understand the process, evaluate your options, and ensure radon is handled correctly from start to finish.

Radon Professional Requirements within Colorado

Before hiring any radon company in Colorado, always verify that the installer, technician, measurement professional, or mitigation specialist is fully certified and licensed. Colorado regulates radon professionals under House Bill 21‑1195 (HB21‑1195), passed in June 2021, which created the state’s licensing framework for radon measurement and mitigation professionals.

Under this law, radon professionals must:

• Hold an active NRPP or NRSB certification
• Register, maintain, and fulfill the DORA radon license requirements 
• Follow ANSI/AARST standards for all measurement and mitigation work 

These certifications and licenses are public records and can be searched at any time. For your safety and peace of mind, use the links below to verify NRPP certifications and DORA licenses before contracting any radon services.

Because so much is at stake — your client’s health, the safety of their family, and the security of their investment — radon testing and mitigation should be treated as a high‑priority item during any Colorado real‑estate transaction. 

Colorado regulates radon measurement and mitigation professionals under House Bill 21‑1195 (HB21‑1195). Under this law, radon professionals must:

• Hold an active NRPP or NRSB certification
• Maintain a DORA radon license
• Follow ANSI/AARST standards for all testing and measurement work

These credentials are public and can be verified at any time. Always confirm a professional’s certification before scheduling radon testing.

Colorado's Requirements for Landlords, Property Managers, & Real-Estate Transactions

 Colorado’s SB‑23‑206 requires home sellers, landlords, and real‑estate brokers to provide clear, written radon disclosures during any residential sale or lease. This includes a mandatory radon warning statement, all known radon test results and mitigation records, and the official CDPHE radon brochure. Landlords must also mitigate elevated radon levels or tenants may void the lease under Colorado’s habitability laws (with some changes beginning in 2026). The law reinforces that radon professionals must be state‑licensed and aims to increase transparency and protect public health in one of the nation’s highest‑risk radon states. 

If you’re preparing to sell your home, one of the smartest steps you can take is to test for radon before listing! Early testing helps you avoid last‑minute surprises during inspection and gives buyers confidence in the safety of your home.

You can use a high‑quality DIY test or hire a licensed radon measurement professional. If elevated levels are found, Sage Brush Radon can design and install a fully compliant mitigation system that brings your home’s radon levels down to safe, acceptable standards. Simply sealing cracks or patching concrete will not resolve a radon issue — effective mitigation requires addressing radon at its point of entry and creating a controlled pressure environment beneath the home.

Having Sage Brush Radon professionally install your mitigation system in place before listing shows buyers that you are a proactive, responsible homeowner who values safety and transparency. It also eliminates a common negotiation hurdle and can make your home more attractive in a competitive market.

With Sage Brush Radon, you can move forward with confidence knowing your home meets Colorado’s radon safety expectations and will pass any radon‑related inspection requirements.

When you’ve found the home you love, make sure you request a radon test before closing even if a radon system is already installed! Radon levels can vary dramatically from one house to the next — even within the same neighborhood — because radon comes from the natural breakdown of uranium in the soil and rock beneath the home. 

Elevated levels don’t mean a home is “bad”; it simply means the property needs proper mitigation.

If the test reveals high radon levels, there’s no need to walk away from the home solely because of radon. Radon issues are highly fixable, and Sage Brush Radon can install a professional mitigation system that reduces radon gas to safe, acceptable levels. Once installed, a mitigation system protects both your family’s long‑term health and the value of your investment.

Including radon testing and mitigation in your real‑estate agreement ensures you enter your new home with confidence and peace of mind. 

When you’re ready, Sage Brush Radon is here to guide you through the process and provide a reliable, long‑term solution.

Prevent lung cancer for your family or business by ordering a radon test! It's not only good lung health prevention it is also great property enhancement. Adding a radon system, when necessary, will increase the value of your home and prevent further costs when selling your property. Pets and children are more prone to radon exposure as they are closer to the ground and have higher respiratory rates. The radon levels closer to the ground could be twice as much compared to a normal adult's height. 

Even if you aren't planning on selling now, in the future your transaction may require testing and mitigation. Taking care of it now will help the future transaction to be completed more smoothly. 

Taking action now will help to prevent potential health concerns in the future!

When you’re ready, Sage Brush Radon is here to guide you through the process and provide a reliable, long‑term solution.