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How Long Does It Take to Mitigate Radon?

Radon mitigation typically takes between four and eight hours to complete, assuming a standard home and a straightforward system installation. The duration can vary based on factors such as the size of the house, foundation type, and radon levels.

Understanding Radon and its Dangers

Radon is a colorless, odorless, and tasteless radioactive gas that occurs naturally from the breakdown of uranium in soil, rock, and water. It’s a significant health hazard, being the second leading cause of lung cancer in the United States, responsible for an estimated 21,000 deaths annually. Because you can’t see, smell, or taste it, testing is the only way to know if it’s present in your home. Radon enters homes through cracks and other openings in the foundation, and it can accumulate to dangerous levels.

The Mitigation Process: A Step-by-Step Guide

Radon mitigation involves installing a system that vents radon gas from under the house to the outside before it can enter your living spaces. The most common method is soil suction, which typically involves the following steps:

Assessment: A qualified radon mitigation professional will inspect your home to identify the best location for the mitigation system. This includes checking the foundation type, identifying potential entry points, and evaluating ventilation.
System Design: Based on the assessment, the contractor designs a customized mitigation system. This involves determining the number of suction points, the location of the vent pipe, and the type of fan needed.
Installation: The installation process begins with drilling a hole through the concrete slab or basement floor to create a suction pit. A PVC pipe is inserted into the pit and sealed to the slab. The pipe runs through the house to a vent fan, typically located in the attic or outside.
Sealing: Cracks and other openings in the foundation walls and floor are sealed to prevent radon from entering the home through other routes.
Testing: After the system is installed, the contractor will conduct post-mitigation testing to ensure the system is effectively reducing radon levels below the EPA action level of 4 pCi/L (picocuries per liter).

Factors Affecting Mitigation Time

Several factors can influence the duration of a radon mitigation project:

House Size: Larger homes may require more complex systems with multiple suction points, which naturally increases the installation time.
Foundation Type: Slab-on-grade foundations, basements, and crawl spaces each require different mitigation techniques, and some are more time-consuming than others.
Radon Levels: Extremely high radon levels may necessitate a more robust system, potentially adding to the installation time.
Accessibility: Difficult access to the attic, crawl space, or other areas can also prolong the process.
Number of Suction Points: Homes with complex foundation configurations may require multiple suction points, increasing both the time and cost of mitigation.
Weather Conditions: While most of the work is performed indoors, extreme weather conditions could slightly impact outdoor work, such as venting the system.
Contractor Experience: An experienced and well-equipped contractor can typically complete the job more efficiently than someone less familiar with radon mitigation techniques.

Post-Mitigation: What to Expect

After the mitigation system is installed, it’s crucial to maintain it properly. This includes regularly checking the system’s operation and retesting for radon every two years to ensure its continued effectiveness. A manometer, typically installed on the vent pipe, provides a visual indication that the system is functioning correctly. Should you notice anything abnormal, contact your mitigation professional immediately.

FAQs About Radon Mitigation

Here are some frequently asked questions about radon mitigation:

What is the EPA’s action level for radon?

The Environmental Protection Agency (EPA) recommends taking action to mitigate radon levels in your home if they are at or above 4 pCi/L. Even levels below this threshold still pose a risk, and some homeowners choose to mitigate at lower levels for added protection.

How much does radon mitigation typically cost?

The cost of radon mitigation can vary widely, typically ranging from $800 to $2500. Factors influencing cost include the complexity of the system, the size of the house, and the contractor’s fees.

Do I need to hire a certified radon mitigation professional?

Yes, it is strongly recommended to hire a certified radon mitigation professional. Certified professionals have received specialized training and are equipped to design and install effective mitigation systems. They also adhere to industry standards and ethical practices. Many states require certification for radon mitigators.

Will a radon mitigation system affect my home’s value?

Generally, a radon mitigation system can increase your home’s value. It demonstrates that you have taken steps to address a potential health hazard, making your home more attractive to buyers.

How long does a radon mitigation system last?

With proper maintenance, a radon mitigation system can last for many years, typically 10 to 20 years or more. However, the fan may need to be replaced every 5 to 10 years, depending on the model and usage.

Is it safe to live in my home during radon mitigation?

Yes, it is generally safe to live in your home during radon mitigation. The mitigation process itself does not significantly increase radon levels, and the contractor will take measures to minimize disruption and dust.

What are the different types of radon mitigation systems?

The most common type of radon mitigation system is soil suction, but there are also other options, such as block wall suction, drain tile suction, and sealing. The best system for your home will depend on its foundation type and radon levels.

Can I install a radon mitigation system myself?

While DIY radon mitigation kits are available, it is highly recommended to hire a certified professional. Incorrect installation can render the system ineffective and potentially create other problems. Professionals have the knowledge and equipment to ensure proper installation and testing.

Does radon mitigation eliminate radon completely?

Radon mitigation aims to reduce radon levels to below the EPA action level, but it may not eliminate radon entirely. A well-designed and installed system should significantly lower radon levels, minimizing the risk of lung cancer.

How often should I test my home for radon?

It’s recommended to test your home for radon every two years, even if you have a mitigation system installed. Also, test after any renovations or changes to your home’s foundation.

What happens if my radon levels are still high after mitigation?

If radon levels remain above the EPA action level after mitigation, contact your mitigation professional. They may need to adjust the system or add additional suction points. The original contractor is often obligated to rectify the situation.

Will a radon mitigation system make my house colder or hotter?

A radon mitigation system should have minimal impact on your home’s temperature. The system is designed to vent radon gas to the outside, and it does not significantly affect the flow of air in or out of your home. Properly sealing any cracks or openings during installation can even improve energy efficiency.