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It has been 19 months since our systems install have begun (excluding our experimental work in 2003) and we have now over 180 installs to date. That is quite the response from the market place!
While have not tabulated all of the results yet, I can say
that the data is very encouraging. We have noted :
- No house has increased in heave after the install with one exception. One house had an addition outside of the original stem wall
- All of the houses measured have experience a either a small drop to some with up to 1/2" drop in heave.
- David Deatherage PE has calculated that we are removing up to 70 lbs of water per day from under the foundation.
I do have an anecdotal story to tell of the system success.
I bought a house in 2008 near Stapley and I-60, the ground
zero of expansive soil in the valley. The house had 1 ½ “ cracks in the floors
and ceilings. I repairs the cracks cosmetically and at a later date installed
the MoistureLevel system. About a 10 months ago I got a call from my tenant
telling me that they could hear water running under the floor slab at a very
rapid rate. By the time I located the leak and fixed it, we dumped up to
100,000 gallons of water under the slab according to SRP. So far I have had
only very minor signs of movement. I will keep you posted.
As we tabulate and organize the all data that we are currently
collecting I will be presenting it here for you to see.
Questions. 1. How many houses does your data represent?
ReplyDelete2. How long has your system been installed? 3. What other remediation work was accomplished at each of these house sites?
4. What is the basis and date for the statement that up to 70 pounds of water is transpired from under the foundation (or do you mean the entire house) every day? 5. Have you conducted additional post remediation floor level surveys?
Comment: Re: your house near Stapley & I-60. In my opinion, 10 months is not a very long time to assess long-term performance.
Hey Glen, thanks for your comments.
ReplyDelete1. The 180 installs are roughly the same as homes. Usually one per household.
2. Our first install was may of 2014.
3. Some are stand alone installs, some have had piles installed in the low areas, and some have had grading and drainage improvements.
4. Dave Deatherage arrived at that number based on the relative humidity readings and air speed of the exhaust minus the relative humidity of the ambient outside air using pyschromatic charts. Feel free to reach out to him for more detailed information.
10 months is not like 10 years. neither is 19 months. That statistic will improve with time.....:)
We are conducting floor level surveys on a 6 month basis. Claudia Zapata from ASU is having her post grad students help with this.