Short-term test
$165per house
Two monitors placed side by side for two to four days, collected by us, with a written result in plain words.
Prices for November 2026
Tests, systems and what they cost.
Every price below includes the trip within twenty miles of Corliss Falls. A system price is confirmed in writing after we have looked at the basement.
Tests
Follow-up test
$125per house
A second short-term test in the same spot, to confirm a first result before you decide on a system.
Systems
Fan-and-pipe system
from $1,450installed
One suction point under a basement slab, sealed sump lid and floor cracks, one pipe, one fan and a vent above the roofline. The retest afterward is included.
Extra suction point
$350each
For a large or divided slab, or a basement with a separate addition. We tell you at the look-around visit if one is needed.
Crawlspace sealing
quotedafter a visit
A sealed sheet over the crawlspace floor with its own suction point. The quote depends on the size and how easy it is to reach.
Fan replacement
$395per fan
A new fan on an existing system, ours or someone else’s, with a check of the pipe and seals and a retest.
We stand behind our own work: if something we installed stops working the way it should, call and we come back to put it right.
The two kinds of visit
A test visit
- We agree on a time. Windows and outside doors stay shut for 12 hours before and during the test.
- We set two monitors on the lowest floor you use and note where they sit. It takes about twenty minutes.
- Two to four days later we collect them.
- Within five business days you get the result and our plain-words note on what to do next.
A system visit
- A free look-around visit first: the slab, the sump, any crawlspace and where a pipe could run. You get a written price.
- Install day, usually one day: one hole through the floor, sealing, the pipe, the fan and the vent. We vacuum up after ourselves.
- Before we leave we show you the small gauge on the pipe that tells you the fan is pulling.
- We retest after every system to show the result, a few days after the fan starts, at no charge.
Winter testing calendar
Monitors are placed Monday to Thursday, so pickup lands on a weekday or a Saturday morning.
| Month | Test placements | Good to know |
|---|---|---|
| November 2026 | Open | No placements November 25–27 for Thanksgiving. Book about a week ahead. |
| December 2026 | Open until December 17 | Closed December 24 to January 1. Monitors placed by December 17 are collected before the holiday. |
| January 2027 | Open from January 4 | The busiest month. Book about two weeks ahead; system installs about three weeks out. |
| February 2027 | Open | A good month for a follow-up test on a January result. |
| March 2027 | Open while windows stay shut | Last weeks of closed-house season. After that we ask you to keep windows shut for the test days. |
Questions people ask
Do I have to stay home during a test?
No. Live as usual and use the door to come and go. Just keep windows shut and leave the monitors where we put them.
Will a system be loud?
The fan sits in the attic or outside the house, so in most homes you hear a low hum near it and nothing in the rooms.
Already have a result?
Send us the number and the date it was taken. We’ll suggest a follow-up test or set up a look-around visit.