Radon mitigation installed in one day — post-test guaranteed below 4.0 pCi/L or we modify the system free.
Active sub-slab depressurization systems sized to your foundation — sealed, labeled, post-tested, and guaranteed in writing.
From $800 · Below 4.0 pCi/L on the post-test, or we modify the system at no charge.
The problem
A high radon test isn't a maybe — it's a measured concentration of a Class A carcinogen in the air your family sleeps in, every night, in a state where the average tested home reads 2.5 times the federal action level.
Out-of-town crews quote sight-unseen, route ugly pipe across the front of the house, skip the diagnostics, and are 30 miles away when the post-test comes back high. A fan bolted to an unsealed slab is not a mitigation system.
We do pressure-field diagnostics before choosing suction points, seal the entry routes your foundation actually has — sump pits in Coralville, stone walls on the Northside, stub pipes in Tiffin — and install the full system in one day. Then we re-test. Below 4.0 pCi/L or we come back and modify it free.
What’s included
- Pre-install pressure-field diagnostics — suction points chosen by measurement, not habit
- Sub-slab suction point(s), schedule-40 PVC vent stack routed for looks as well as code
- Sealed sump lid and caulked slab joints and penetrations
- Energy-efficient inline radon fan with u-tube pressure gauge and system label
- Post-mitigation verification test — below 4.0 pCi/L guaranteed in writing
- 5-year fan warranty and lifetime workmanship warranty
Our process
- 1Flat-price quote from your test report and foundation details — the price we quote is the price you pay
- 2One-day install: suction point, vent stack, fan, sealing, labeling
- 348-hour post-mitigation test verifies the result
- 4If it's not below 4.0 pCi/L, we modify the system at no charge until it is
Transparent pricing
| Exterior system, single suction point (typical post-1990 home) | from $1,200 |
| Interior/garage-routed system (attic fan, hidden stack) | from $1,450 |
| Complex foundations — stone/block walls, crawl + slab combos, 2nd suction point | from $1,800 |
| Passive-to-active conversion (fan on existing RRNC stub) | from $800 |
Frequently asked questions
Will the system actually get my number below 4.0?
Yes — that's the written guarantee. Most of our installs land under 2.0 pCi/L on the post-test. If yours doesn't come in below 4.0, we add suction points, upsize the fan, or extend sealing at no charge until it does.
How loud is the fan, and what does it cost to run?
The inline fans we install run at about the volume of a bathroom fan heard through a wall, and draw 50–90 watts — roughly $5–$9 a month on Iowa City electric rates.
Can the pipe run somewhere I won't see it?
Usually. On most Johnson County homes we can route through a garage or closet chase to an attic-mounted fan, or place an exterior stack on a rear corner. We walk the routing with you before we drill anything.