Radon Mitigation in Cottonwood Heights, UT

Two Canyon Mouths, One Town

Cottonwood Heights is the only community in the valley that sits between both Cottonwood canyons, and that is its whole radon story. Big Cottonwood and Little Cottonwood have each built a large alluvial fan out into the valley, and the town is spread across where they overlap. The material is coarse, permeable and derived from uranium-bearing rock in the range above — the combination the geological surveys flag as the highest hazard potential in Salt Lake County. This is not a subtle setting.

Steep Lots and Tuck-Under Garages

The gradient here is real, and the houses answer it with split levels, tuck-under garages and daylight basements. A tuck-under garage is worth singling out: it puts an unconditioned slab and a large door directly beneath living space, and the pressure relationships between that garage, the soil under it and the rooms above are rarely what people assume. It is also where a riser can often run cleanly, which makes it worth looking at early rather than last.

Shallow Rock and Boulders

Close to the canyon mouths the fan material is not tidy graded gravel — it is debris-flow deposit, which means cobbles and boulders in a sandy matrix, sometimes with competent rock not far below. Drilling a suction point into that is unpredictable work. Occasionally the core comes out clean and the pit is straightforward. Occasionally it hits a boulder at eight inches and the location moves. It is a normal part of the job on this ground and it is better flagged in advance than discovered as a surprise on the day.

The Uphill Wall

On a cut-in lot the soil does not stop at the floor. A basement wall retaining a hillside has soil pressed against it over a substantial height, and on permeable fan material that wall is a route in as legitimate as the slab. A system that treats only the floor can leave a measurable fraction of the entry path untouched. Where that is the situation, the design accounts for it — which may mean sealing work along the wall–floor joint, an additional point, or both.

Coverage Around Cottonwood Heights

Cottonwood Heights throughout, up to the mouths of both canyons and across the Fort Union corridor into the Holladay boundary. Twenty minutes from downtown. Genuine canyon addresses above the winter gate are worth a call first, because access and travel start to affect scheduling. Everything opens with a test and closes with another.

Cottonwood Heights Radon FAQs