There is a lot of new home building activity taking place in north Georgia right now. But, before you break ground, consider taking time to eliminate the threat of radon gas in your new home. Ask Cooks about new construction radon gas prevention techniques for the building of your new home. These construction techniques may vary for different house foundations and building site requirements, but the following features should be part of your home plan to prevent radon from entering a home:


For New Construction, Prevent Radon Gas at the Start

Ask Cooks about new construction radon gas prevention techniques for the building of your new home.

Start with Gravel

Use a 4-inch layer of clean, coarse gravel below the “slab,” also called the foundation. This layer of gravel allows the soil gases, which includes radon, that occur naturally in the soil to move freely underneath the house. Builders call this the “air flow layer” or “gas permeable layer” because the loose gravel allows the gases to circulate. NOTE: In some regions of the country, gravel may be too expensive or unnecessary. Alternatives are allowed, such as a perforated pipe or a collection mat.

Then Add Plastic Sheeting or Vapor Retarder

Place heavy duty plastic sheeting (6 mil. polyethylene) or a vapor retarder on top of the gravel to prevent the soil gases from entering the house. The sheeting also keeps the concrete from clogging the gravel layer when the slab is poured.

Add Vent Pipe

Run a 3-inch or 4-inch solid PVC Schedule 40 pipe, like the ones commonly used for plumbing, vertically from the gravel layer (stubbed up when the slab is poured) through the house’s conditioned space and roof to safely vent radon and other soil gases outside above the house. (Although serving a different purpose, this vent pipe is similar to the drain waste vent, DWV, installed by the plumber.) This pipe should be labeled “Radon System.”

Seal and Caulk Everything!

Seal all openings, cracks, and crevices in the concrete foundation floor (including the slab perimeter crack) and walls with polyurethane caulk to prevent radon and other soil gases from entering the home.

Include a Junction Box in the Attic

Install an electrical junction box (outlet) in the attic for use with a vent fan, should, after testing for radon, a more robust system be needed.


Call Cook’s for New Construction Advice

Building a new home with radon gas prevention in mind can add value to your new home. Protect your health and reduce radon mitigation costs. For more information, get all the advice you need from Cook’s for new construction radon gas prevention.


Call (770) 652-1101

Cook’s Radon Offers New Construction Radon Gas Prevention Techniques
We’ll Keep Your Home and Family Safe


For more information about radon resistant home builders, see the following: