St. Louis Crawl Space Depressurization System

crawl space depressurization

Radon reduction in crawlspace foundations in St. Louis can be done by Green Radon & Remodeling using either sub-membrane depressurization or crawl space depressurization.

Sub-Membrane Depressurization

To help make other radon reduction techniques more effective and cost-efficient, the air pressure found on a crawl space floor may be lowered by placing a heavy plastic sheet on the ground, as a gas retarder membrane. Then the air pressure accumulated in the crawl space may be relieved and expelled safely outdoors by drawing it out from beneath the membrane with the use of a fan-powered vent

Crawl Space Depressurization

This method lowers air pressure in a crawl space relative to indoor air pressure by use of a fan-powered vent drawing air from within the crawl space.

With this system a 6 mil poly sheet is laid over the floor of the crawl space and sealed to the foundation walls and any penetrations.  A 3" pvc pipe is connected and routed to the radon fan either in the attic above or outside and vented above the roof.

St Louis crawl space depressurization system

Our St. Louis Crawl Space Depressurization System Services

  • Radon Detector
  • Crawl Space Repairs
  • Crawl Space Ventilation
  • Radon Reduction System


We Provide Crawl Space Depressurization System to the Following Areas:

Illinois - Collinsville, IL | Edwardsville, IL | Effingham, IL | Maryville, IL | Vandalia, IL | Highland, IL | Granite City, IL | Glen Carbon, IL Bethalto, IL | Godfrey, IL | Alton, IL | St Jacob, IL | Fairview Heights, IL | Belleville, IL | Shiloh, IL | New Baden, IL | Mascoutah, IL | Freeburg, IL | Smithton, IL | Columbia, IL | Millstadt, IL | Waterloo, IL | Madison County, IL | St Clair County, IL | Vandalia, IL


Why St. Louis Should Hire Us For Crawl Space Depressurization System

Anyone can call themselves a contractor, but buyer beware, most are not qualified legitimate business that pay taxes and provide necessary insurance for your protection.  When trouble comes, and it will, you may be stuck with a serious problem.  We are accredited members of the BBB with an A+ rating.  We have that rating because we take care of our clients.

For over 25 years, Phil Green, owner of Green Radon & Remodeling, has earned a solid reputation for home remodeling and installing high-quality radon mitigation systems for clients throughout St. Louis and the Metro-East region utilizing cutting-edge technology and the highest standards in carpentry.


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If you are looking for a St Louis remodeling and Crawl Space Depressurization System company then please call 618-343-0033 or complete our online request form.