JoistbrumeRadon testing & mitigation

Closed-house season
November–March

Corliss Falls and the river towns · Winter testing is booking now

Test the house first. Then decide.

A short-term radon test takes two to four days with the windows shut. If the result says a system makes sense, we put in one pipe and one fan, then test again so you can see the change.

A house drawn cut open from roof to basement. A pipe runs from a small pit under the basement floor, up through the house to a fan in the attic, and out above the snowy roof. 1 2 3 4 5

What a system is, floor by floor

  1. A small pit under the floor. One hole through the basement slab, with a little gravel scooped out below it.
  2. Sealed openings. We seal the sump lid and the wide floor cracks so the fan pulls from under the slab, not from the room.
  3. One pipe. It runs up through a closet or along an outside wall, wherever you and we agree it looks tidy.
  4. A quiet fan. It sits in the attic or outside, never in a room you live in.
  5. A vent above the roofline. Soil air leaves the house well above windows and doors.

How a test visit goes

  1. 1

    We agree on a time

    Keep windows and outside doors shut for 12 hours before we arrive. Coming and going through the door as usual is fine.

  2. 2

    Two monitors go down

    We set two small monitors side by side on the lowest floor you use, away from drafts, and write down where they sit.

  3. 3

    We pick them up

    After two to four days we collect them. You don’t need to be home if we can reach the basement.

  4. 4

    You get the number, in plain words

    Within five business days we send the result, what it means for your house and whether a follow-up test makes sense.

Sample prices

Short-term test
$165
Follow-up test
$125
Fan-and-pipe system
from $1,450
Every price, both visits and the winter calendar

Windows are shut anyway.

November to March is the easiest time to test. Tell us your town and a few days that suit you.

Book a winter test