New Construction
Challenge
Reviewing project plans during the design phase to incorporate radon-resistant construction features and future mitigation pathways can significantly reduce costs for builders and homeowners over the long term.
By evaluating the plans before construction begins, we can identify opportunities to:
- Install passive radon control systems during construction at a fraction of the cost of a post-construction retrofit.
- Design dedicated pipe chases that allow radon vent piping to run from the sub-slab to the attic without requiring drywall removal, framing modifications, or fire-rated repairs later.
- Ensure proper sub-slab preparation, including gas-permeable layers, soil gas collection points, and vapor barriers where applicable.
- Strategically locate electrical outlets in attic or mechanical spaces to accommodate future fan installation if elevated radon levels are discovered after occupancy.
- Coordinate vent pipe routing with HVAC, plumbing, and structural components to avoid costly conflicts during construction.
- Maintain architectural aesthetics by planning vent termination locations before roofing and exterior finishes are completed.
- Improve compliance with current and anticipated radon-resistant construction standards.
The cost of incorporating radon-resistant features during construction is typically a small percentage of the cost of a post-construction mitigation system. In many cases, a properly designed passive system can be activated with a fan if needed, eliminating the need for invasive retrofits that may involve drywall removal, attic modifications, roof penetrations, and disruption to homeowners.
A comprehensive plan review helps builders deliver healthier homes, reduce warranty concerns, minimize future remediation expenses, and provide an added value feature that can be marketed to prospective buyers as part of a healthy home construction strategy.
Solution
The most cost-effective time to address radon is before the concrete slab is poured. By planning ahead during construction, builders can avoid expensive retrofits and provide homeowners with a simple path to radon mitigation if elevated levels are discovered in the future.
Our approach starts by installing a 4-inch PVC collection pipe beneath the slab before concrete placement. The pipe is positioned within the stone base, allowing it to collect soil gases from beneath the home. From there, the pipe is routed vertically through the structure and into a designated utility area, mechanical room, garage, or wall chase that can easily be extended to the attic.
We also work with the builder to identify a future fan location and recommend installing a nearby electrical outlet during construction. If radon levels are found to be elevated after the home is occupied, the system can typically be activated by simply extending the pipe through the roof and adding a radon fan—without cutting concrete, opening finished walls, or disrupting the homeowner.
This proactive design eliminates many of the challenges associated with traditional radon mitigation retrofits. It reduces future labor costs, minimizes damage to finished surfaces, and helps preserve the appearance of the home. Most importantly, it gives homeowners peace of mind knowing their home was built with a practical and affordable radon solution already in place.
By incorporating radon-ready features during construction, builders can deliver healthier homes, reduce future warranty concerns, and provide an added value feature that differentiates their projects in today's market.
