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Verified Reviews for Radon Detection And Reduction pros in Allendale, SC

*The Angi rating for Radon Detection And Reduction companies in Allendale, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in Allendale, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on February 22, 2026

Find Radon detection and reduction specialists in Allendale

Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
4.8(
10
)

Serving Allendale, SC and surrounding areas

In business since 2002

Free estimates

Credit card accepted

"Had them come out to install a Radon Mitigation Fan. Service was fast and the installer was extremely knowledgable. He was in an out within an hour and the radon dropped from a 4 to a 0.59! Extremely happy with the result. Price wasn't cheap by any means but definitely fixed our problem."
Recommended by100%of homeowners
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Avatar for Coastal Empire Roofing & Construction Co
Coastal Empire Roofing & Construction Co
3.1(
16
)

Serving Allendale, SC and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"They did a wonderful job on my sunroom. A previous contractor did a VERY poor job - the sunroom was a disaster. But Coastal Empire made it BEAUTIFUL!! I was very happy with the results. The workers were very nice, and always cleaned up after their work."
Pantarah Sunroom Series
Recommended by80%of homeowners
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Radon Detection and Reduction questions, answered by experts

Keeping radon from getting into your home is much better than having to get rid of it once it's already indoors. While there may not be a way to fully prevent radon from getting into your home, there are things you can do to reduce the gas's ability to enter. 

Sealing foundation cracks and openings can help keep the gas from seeping inside. Improving air flow, such as by opening windows, can also be helpful. If you're building your home from scratch, talk to your contractor about using radon-resistant construction to keep the gas out.

Installation typically takes 1-2 days, depending on the system and property layout.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

The Allendale, SC homeowners’ guide to radon detection and reduction services

From average costs to expert advice, get all the answers you need to get your job done.

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