These techniques make homes safer from radon
These construction techniques help block radon from entering the home. The occupants will benefit from lower radon levels in their new home.

It is easy to upgrade when there is a need to increase the radon reduction.
If high radon levels are found, the techniques allow for easy and inexpensive installation of a fan for increased radon reduction in the home. Every new home should be tested for radon by the homeowner after occupancy.

For Example:
Materials and labor costs for Radon-Resistant Techniques vs. Retrofitting an Existing Home is $350 to $500 vs. $800 to $2,500 (a 128% to 400% saving!)

Some construction companies successfully use this as a marketing advantage.

Improve the Home's Energy Efficiency
Radon-resistant construction techniques provide an average of $65 per year in energy savings for the homeowner.

Radon-Resistant Construction Techniques
There are five major parts to the passive radon-resistant system:

• A layer of gas-permeable material under the foundation (usually four inches of gravel).
• Plastic sheeting over the gas-permeable material.
• Sealant and caulk on all openings in the concrete foundation floor.
• A gas-tight three- or four-inch vent pipe that runs from under the foundation through the house to the roof.
• A roughed-in electrical junction box for the future installation of a fan, if needed.

Source: Environmental Protection Agency