Sub-slab and crawl space sub-membrane systems for Treasure Valley homes. Installed in about a day, priced flat before work starts, and verified with a clearance test so you see the after number yourself.
Get a mitigation quote → (208) 510-0970For comparison, Idaho's health department pegs radon-resistant features in new construction at $350 to $500, versus $800 to $2,500 to retrofit an existing home. If you're building in the valley, ask your builder for radon-resistant construction now. If your home already exists, mitigation is the fix, and it's a one-day fix.
Radon moves through soil and gets pulled into your house by the slight vacuum your home naturally creates, the stack effect. A sub-slab system reverses that pressure relationship. We core a small hole through the slab, excavate a suction pit beneath it, and run PVC piping to a continuously running fan mounted outside or in unconditioned space. The fan holds the soil under your slab at lower pressure than your house, so radon gets pulled out and exhausted safely above the roofline instead of drifting up into your living space. Boise's North End, the Bench, and other basement-heavy neighborhoods are classic candidates for this system.
Crawl spaces are the Treasure Valley's most common radon entry path, open soil under the house, connected straight to your living space by the stack effect. The fix is a heavy-duty membrane sealed across the entire crawl space floor and up the foundation walls, with suction piping underneath it. The fan draws radon from under the membrane before it can enter the house. Done right, this also dries out the crawl space and blocks ground moisture, which is why it pairs naturally with our crawl space vapor barrier work.
A lot of valley homes are part basement, part crawl space, especially split-levels and older homes with additions. Those need both approaches tied into one fan and one exhaust run. This is where sizing matters: an undersized system pulls the number down but not under the line, and you've paid for a system that didn't finish the job. We size to the foundation, not to a one-size template.
Selling or buying and on an inspection deadline? The same process runs on a compressed clock, see real estate radon for how mitigation fits inside a closing timeline.
Existing-home systems typically run $800 to $2,500. A straightforward sub-slab system on a basement or slab home lands near the lower half of that range. Homes with open crawl spaces that need a full sealed membrane land toward the top. You get a firm number before work starts.
It depends on your foundation. Basements and slab-on-grade homes usually get sub-slab depressurization. Crawl space homes, extremely common across the valley, get sub-membrane depressurization. Many homes have both foundation types and need a combined system.
The fan runs at roughly the volume of a quiet bathroom fan and mounts outside or in unconditioned space like a garage or attic. Piping runs along the least visible side of the house whenever the layout allows.
About as much as a light bulb, a few dollars a month. Radon fans run continuously and are built to last for years.
Every install ends with a post-mitigation test, typically within 24 to 48 hours. You see the before number and the after number. Properly installed systems routinely land under 2.0 pCi/L.
One-day installs across Boise, Meridian, Eagle, Nampa, and Caldwell.
☎ (208) 510-0970