Does my new home need radon testing?

Absolutely. Even homes built with radon-resistant new construction (RRNC) features should be tested after occupancy. The EPA recommends testing every new home, as passive systems alone don't always reduce radon below the action level. Post-construction testing is the only way to know if your new home is safe.

What is radon-resistant new construction (RRNC)?

RRNC includes specific building features designed to reduce radon entry: a layer of aggregate beneath the slab, a polyethylene vapor barrier, sealed slab penetrations, and a PVC vent pipe routed from the sub-slab to above the roofline. These features make it easy to add a fan later if needed.

Is it cheaper to add radon features during construction?

Yes, significantly. Adding radon-resistant features during new construction costs $500-$1,500, while retrofitting a mitigation system to an existing home costs $800-$2,500+. Builders in high-radon areas increasingly include RRNC as a standard feature.

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New Construction Radon Systems

Radon-resistant new construction (RRNC) systems and post-build testing for newly constructed homes.

Typical Cost$500 – $1,500

TimeframeTesting: 48 hours | Fan activation: 1-2 hours

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About New Construction

Many states and building codes now require radon-resistant features in new construction. These passive systems — including sub-slab aggregate, vapor barriers, and vent pipes — are built into the home during construction. However, passive systems alone often don't reduce radon enough, and many new homes still test above the EPA action level. Post-construction testing and fan activation are critical final steps.

Key Benefits

Much cheaper to install during construction than retrofitting later

Passive systems can be easily activated with a fan if needed

Ensures compliance with local building codes requiring RRNC

Protects new homeowners from day one

Pre-installed piping is hidden within walls for clean aesthetics

Adds value and marketability to new construction homes

How It Works

During construction: sub-slab aggregate layer, vapor barrier, and vent pipe installed

Passive vent pipe routes from sub-slab through the home to above the roofline

After construction: professional radon test determines if passive system is sufficient

If levels exceed 4.0 pCi/L: inline fan is added to activate the passive system

Fan installation takes 1-2 hours using existing piping

Post-activation test confirms levels are reduced

Ideal For

Homebuilders and developers in high-radon areas
New homebuyers wanting post-construction verification
Homes with passive radon systems that need fan activation
Areas where building codes require radon-resistant construction

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