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Soil Injection


Soil Injection uses non-toxic, water soluble chemicals (potassium salts and ammonium ions) that are injected into the ground under your building. These chemicals inhibit a soil’s ability to absorb water so that your soils do not swell up.




In most cases, for existing structures, chemical injection is done around the perimeter of a foundation.   For driveways, patios, decks, or other paved surfaces, ¾ inch diameter drilled holes through the paving reach the underlying soils.  Chemical injection reaches depths ranging from 7 to 10 feet. 

Solution injections happen at relatively low pressures, typically on two separate days.  Trucks pump solutions to a manually operated injection wand. Injections can be done on the interiors of buildings, however, interior treatment requires that holes be drilled though the floor every 4 square feet.  While exterior injections are hardly noticeable, this is not true for interior injections.  When doing interior injections, remove the contents of a home because the chemicals sometimes splatter during injection.

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Chemical injection / Soil injection is an appropriate remedy to use when upward movement has started to affect a small area under your foundation.  Use chemical injection with an uplift of less than 1.5 inches and has not yet extended more than 15 feet towards the interior of the building.  Chemical injection does not reverse the uplift, but can help prevent the upheaval from increasing and/or spreading.  By stopping the upheaval and leaving the slightly sloped foundation as is, owners can avoid more costly repairs.


Water sticks to almost anything including clay.  This attraction causes clay soil to swell.  The trick is to use a non swelling chemical to stick to the clay before water does.  When injecting an appropriate concentration of the right chemicals into clay, the chemicals stick to the clay molecules and prevent the clays from absorbing water.  Once in place, the chemicals stay attached to the clays. By injecting the chemicals into the soil and “coating” the clay, you create a moisture barrier, helping to stop water from causing more foundation upheaval.



Because soils vary significantly in their chemical composition, there is no guarantee that a chemical injection / soil injection will successfully prevent further upheaval.  When an injection is unsuccessful, we offer a 50% credit against the cost of a complete underpinning, if the underpinning is performed by our company.



The materials used in the solution are not toxic.  In the ground, in dilute concentrations, they actually act as fertilizers.  



Foundation maintenance can prevent some types of upheaval through the installation of proper foundation drainage including:

  1. French drains
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  2. Irrigation
  3. Gutters
  4. Moisture barriers / root barriers

Once foundation upheaval occurrs, we recommend the following types of foundation repairs:

  1. Foundation lowering
  2. Foundation underpinning (underpin building foundation, underpinned building foundation)

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Christopher Lorenzo
Christopher Lorenzo
19:36 06 Sep 17
I have had multiple good experiences with Advance Foundation Repair. They stand by their work and kept me informed at all times on the repairs. Post work service was good too. I am very satisfied with their workread more
Ruth Schuman
Ruth Schuman
19:56 05 Sep 17
Workers were very professional and hard working. They dug up around the house and put plants back to look nice. This company also has a trust to forever be able to redo warranted work.read more
Gwen Baumann
Gwen Baumann
02:30 11 Aug 17
I can't too highly recommend this company. I had work done of my foundation by another company several years ago. That work did not resolve the problem, and that company did not fix. Advanced was recommended to me by mother, who said they were the best in the business. I agree! They were polite, professional, charged reasonable prices, and did excellent work. They also have a strong guarantee that is backed by a trust. I can't imagine why you'd use any other company.read more
Linda Krizka
Linda Krizka
19:44 10 Jul 17
Advanced Foundation repair is the only way to go! The engineer, Eric was kind, helpful and informative! The crew under Haynard's watch was unbelievably considerate. The crew was in and out of our house for 5 days. Everyone of them were happy even in the 90 degree weather. They work hard and were very polite. If you saw my house now you would never even know they were here. They cleaned up every night and on the last day it looked like new! Very thankful to have been able to work with them.read more
Michael Francis
Michael Francis
00:48 29 Apr 17
Advanced recently performed our foundation repair and did a fantastic job! The job took four days and throughout the process, the workers were on time each day, were kind and courteous. They left our house clean each day and took great care in making my wife and newborn comfortable during the repair. They came back out to make adjustments, as was expected, and I am more than pleased with the results. Thanks to Juan Martinez, Miguel Mata and Ernesto Alvarato for doing everything I requested. I highly recommend Advanced Foundation Repair, they know what they are doing.read more
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