Foundation Settling Q&A by Slabjack Geotechnical

Foundation Settling by Slabjack Geotechnical
Foundation Settling by Slabjack Geotechnical

(From our supplier PierTech)

How long have piers existed?

Piers can trace their roots all the way back to 1720 in England, where they were invented. In the nineteenth century, lighthouses were supported by Helical Piers as well.

Why is the term helical used?

Helical anchors are essentially small shaft pipe piles with one or more helical bearing plates attached. Instead of being hydraulically vibrated into the ground, like a pipe pile, they are gently rotated into the ground using high torque hydraulic drive head. They can support most structures, including: Industrial, Commercial, or Residential.

What are screw-piles?

Screw piles, helical piers, and helical piles are synonyms for the same type of foundation solution. They were coined screw pile because of the way they turn and bore into the earth.

What is the difference between a square shaft and a round shaft?

PierTech recommends using square shafts in tension situations because it has a greater yield, tensile strength and higher torque capacity. Round shaft should be used in compression situations because it has a far superior lateral stability (the strength to resist twisting and deflection), as well as it has greater load capacities.

What are the most popular applications for helical piles?

Helical Piles can be used on most structures in new construction or repair, and in 80-90% of soil conditions that exist. However, they are typically used in complex soil conditions or limited access situations that have prohibited the use of other traditional foundation systems.

What are some of the advantages of using piers over other foundation types?

Piers are superior to other methods in many ways. Hand-dug and drilled concrete piers can do an adequate job. However, they are extremely time consuming, messy, expensive, and labor intensive. Driven Piles can be effective, but limited access and sensitivity of existing buildings make their use difficult for an installer. Helical piering is cost effective, requires little to no concrete, can be performed in limited access situations, and is virtually vibration free.

What is their life expectancy?

Many factors determine the life expectancy. Though Helical Piers can be galvanized to prevent rusting, the varying soil conditions can affect the life expectancy. It is the general estimation that piers last over 150 years in normal soil conditions.

How much weight can a Helical pile support?

Depending on the job our Hercules Pile can hold more than 500 tons, or 1,000,000 pounds. You would see similar loads on a 10 story building application.

Will the interior of my house be damaged after installation?

Most of the time the house will not be damaged from the installation. In fact, you may find doors starting to work correctly and some cracks may close.

Why do you put helical piers under an existing foundation?

Helical Piers are used to underpin homes that are sinking, saving the home from additional structural damage. When used in combination with our Tru-lift system, homes can be secured to prevent further settling or raised up to the proper height.

Can helical piles be installed in tight spaces?

Yes, our products can be installed in tight spaces. Our portable equipment allows us to install when there are clearance issues, preventing heavier equipment from being used.

How deep can helical piers be installed?

Most are installed between 10 to 25 feet below the soil, but may be required to extend deeper if the required torque is not met. We have had some piles installed as deep as 100 feet.

What kind of warranty or guarantee do you offer with your helical piles?

We offer a 75 year limited warranty.

What is the minimum spacing?

A general rule is that they should be spaced 3 to 4 diameters on center. Typical Helical Pile spacing is 5 ft – 10 ft.

How do I know when I have a foundation issue?

You may notice cracks in drywall, gaps between walls and ceiling, doors may be sticking, nails coming out of the drywall, windows may stick, cracked floors, or there may be gaps between walls and floors. These all may be an indication of foundation issues.

What are the chances of having more foundation issues after an anchor is installed?

The chances of this are slim to none, if you are using a quality company that provides the proper service to get them installed correctly.

What kind of equipment is used for installation?

PierTech offers installation equipment that attaches to skid steers, mini and full size excavators, and backhoes. PierTech even offers handheld installation equipment for limited access areas.

If you are dealing with a foundation settling problem call the concrete raising and leveling professionals today,


Superior technology, Superior polymers, Superior results!


Foundation Stabilization and Raising by Slabjack Geotechnical

Foundation Stabilization and Raising Slabjack Geotechnical
Foundation Stabilization and Raising Slabjack Geotechnical

Foundation settling is one of the most dreaded concerns for a property owner. If not treated properly major problems can occur rendering your property unsellable.

What should you do? Act sooner rather than later. If caught quickly enough Slabjack Geotechnical is one of the very few contractors in the nation trained to offer deep injection of polyurethane to stabilize and often raise your foundation back to grade. (Available spring 2018) This process is much less costly than piering in many cases when settling is minor or to firm up weak soils to prevent settling.

Most property owners are not experts and should seek out a qualified foundation repair contractor. These experts however do not work without receiving imput from Geotechnical and Structural Engineers to properly address the unique issues with your individual property. Slabjack Geotechnical requires a Geotechnical and Structural Engineer stamp on every piering project we do.

The process usually starts with a site visit where measurements are taken and the structure is visibly inspected. A frank discussion about the potential costs as well as the foundation repair process are discussed. Once a firm decision has been made to move forward a contract will be signed and the initial payment will be made to cover the cost of the materials. After the reports have been provided a plan will be made to stabilize and attempt to lift the foundation back to original grade.  When the materials have been delivered the job will be scheduled and the work completed at which point final payment is due. Slabjack Geotechnical works with Green Sky financial for those interested in our available financing.

Foundation repair often involves the disruption of plantings, the damaging of sprinkler systems, the removal of fencing and more. Access is needed to get equipment such as mini excavators or skid steers into position to dig the holes needed to place the piers that will stabilize the foundation. Slabjack Geotechnical makes every effort to minimize damage but the nature of operating equipment in confined spaces lends itself to some degree of disruption/damage. After the repair has been made Slabjack Geotechnical will backfill and level the site in preparation for landscape repairs arranged by the property owner.

Slabjack Geotechnical proudly utilizes ECP components for our foundation repair products, for foundation stabilization and raising.

Call today,



Raise settled concrete with Slabjack Geotechnical service

Have you been waiting to raise settled concrete? Wait no more! With Slabjack Geotechnical, you can have peace of mind knowing that your settled concrete will be leveled to your satisfaction. Your guests will no longer trip on your sidewalk or driveway before entering your house!

Raise Settled Concrete
Raise Settled Concrete

So you built a new house. And it didn’t take many years for your sidewalk to settle. Now your parents are tripping on the sidewalk before entering the house. There is an easy way to solve this problem once and for all. Just call Slabjack Geotechnical at 1-855-752-2522 and request an estimate to raise your settled concrete – whether it be your sidewalk or driveway.

Or, you bought a fixer upper and you have so much repair to do. You can have Slabjack Geotechnical raise settled concrete for you, as they are the experts, and this can allow you to spend more time on the projects that you can handle yourself.

Perhaps you are in the process of selling your home, but you need to raise settled concrete before you can finish the sale. Get an estimate today by calling Slabjack Geotechnical at 1-855-752-2522. We can give you a timely estimate for your house inspection. We look forward to helping you sell your house with less stress and more property value. You can increase the property value for the neighborhood as well. Make the new owners of your home satisfied and eager to move in to the neighborhood.

Your neighbor might want to raise settled concrete as well. When Slabjack Geotechnical is raising concrete in your area, then you and your neighbor can raise settled concrete at the same time – provided that you both schedule the work to be done on the same day.

Call Slabjack Geotechnical today at 1-855-752-2522.


Superior technology, Superior polymers, Superior results!

We beat Polylevel bids by 10% – Slabjack Geotechnical

We beat Polylevel bids
We beat Polylevel bids

We beat Polylevel bids by 10%.

Slabjack Geotechnical is the most technologically advanced slab lifting Company in the Pacific Northwest. This coupled with our commitment to be on the cutting edge of the industry allows us to raise slabs others only dream about, do projects considered too tricky by other companies and because we source our product locally we can do it for less money than our competitors.

If you have an estimate in hand by any of our competitors using polyurethane injection to raise concrete slabs we will beat the estimate by 10%

Call today, 855-752-2522


Superior technology, Superior polymers, Superior results!

Bulkhead repair and stabilization – Slabjack Geotechnical

Bulkhead Repair and Stabilization


We just recently completed a residential Seawall stabilization project in Bellingham using a single component polyurethane to permeate the soil behind the wall and to seal cold joints.

Using a single component polyurethane mixed with a catalyst that reacts with water, Slabjack Geotechnical is able to inject material deep behind the wall which permeates the soil and return stability to the Seawall or Bulkhead.

This method is by fa the safest way to stabilize Seawalls and bulkheads. Plural component polyurethane can place enormous lateral stress against the wall and cause damage such as bowing, in the case of walls, or in the case of bulkheads, moving rocks out of position or worse.

There are applications where plural component polymers make sense but they are not as thorough at sealing cold joints, filling underneath footers and creating a watertight barrier behind the wall.

If you are dealing with soggy soil wall or worse give us a call today,


Superior technology, Superior polymers, Superior results!


bulkhead repair and stabilization - sealing cold joints
bulkhead repair and stabilization – sealing cold joints

Seawall stabilization – Slabjack Geotechnical

Seawall Stabilization


Seawalls and bulkheads can be very problematic. And when they begin to fail can create some structural problems not just for the wall itself but for homes and businesses that rely on the wall for protection. Slabjack Geotechnical can help. Using both single and plural component systems we stabilize and prolong the life of infrastructure.

Below are some photographs of recent projects we have done using both compaction grouting as well as permeation grouting to seal leaks and prevent further erosion.

Seawall Stabilization - Undersealing the Wall
Seawall Stabilization – Undersealing the Wall
Seawall Stabilization - Sealing Cold Joints
Seawall Stabilization – Sealing Cold Joints
Seawall Stabilization - Void Filling and Sealing Cracks
Seawall Stabilization – Void Filling and Sealing Cracks
Seawall Stabilization - Probe Sealing Under a Seawall at Low Water
Seawall Stabilization – Probe Sealing Under a Seawall at Low Water
Seawall Stabilization - Seal Under the Footer
Seawall Stabilization – Seal Under the Footer

Limited Lifetime Warranty with Slabjack Geotechnical

Limited Lifetime Warranty with Slabjack Geotechnical
Limited Lifetime Warranty with Slabjack Geotechnical

Limited lifetime warranty with Slabjack Geotechnical.

Call today, 855-752-2522

The vast majority  of companies raising concrete slabs only offer a one or two year warranty. Since our inception Slabjack Geotechnical has sought to be a different company, one that sets ourselves apart from the competition.

Today we proudly announce we have extended our warranty to as long as you own the residential property! That’s right, a lifetime warranty. The competition isn’t even close.

Check out our website for details

Slabjack Geotechnical


Superior technology, Superior polymers, Superior results!

Sunken and settling concrete? Slabjack Geotechnical

Sunken and settling concrete solution
Sunken and settling concrete solution

Sunken and settling concrete?


Should I wait until my concrete has settled all the way? A question we sometimes get. The answer is generally “no” because as slabs settle further, damage will often result. Cracking, pulling away from the building and/or draining water to the foundation.

While no one likes to spend money on concrete repair it’s important to realize it only gets worse from today. More expensive, less athletically pleasing and greater potential for cracks.

Let Slabjack Geotechnical provide a detailed proposal about what’s going on, how we are going to fix it and what it’s going to cost. We are professional, knowledgeable and fair. Call today,


for your sunken and settling concrete solution.

Superior technology, Superior polymers, Superior results.

Concrete Raising Innovation by Slabjack Geotechnical

Concrete Raising Innovation
Concrete Raising Innovation

Concrete Raising Innovation


Let’s talk innovation. When we started our slab lifting and pressure grouting business we were one of the first doing polyurethane injection Slabjacking in the United States!  We made a commitment to be on the cutting edge in developing the systems we would use to pump the materials and with the material we would use to raise settled concrete.

For 2017 we have raised the bar, truly redefining our industry. Working with our builder and leaders in the spray foam industry we have developed what we see as the finest Slabjack rig in existence. Using the finest components and revolutionary design we now have the ability to bring the equivalent of two separate operations to a job all contained within one rig.

We have also, by partnering with our material supplier, developed two new polymers. A fast set, hydrophobic polymer for raising heavy structures and slabs and a very slow rise polymer for void filling and slab stabilization. Both with very low thermal requirements. This chemistry allows us to be working sooner and with less exotherm and provide far superior coverage under the slab. This means less resettlement, fewer holes, simply put a better job by design. No more using a “happy medium” material, we can now use the exact material needed for a given job.

Check us out, read our reviews then call the experts,


Superior technology, Superior polymers, Superior results.

Stabilizing concrete before settlement – Slabjack Geotechnical


Stabilizing Concrete Before Settlement
Stabilizing Concrete Before Settlement

Stabilizing concrete before settlement.


A huge frustration is knowing there are voids under your concrete but not thinking there is anything you can do about it. In the recent past you were mostly correct however Slabjack Geotechnical is changing all of that.

Until a Slabjack company gets large enough it is not cost-effective to carry more than a general purpose lifting foam or in the case of Mudjacking their material. In the case of polymer Slabjacking the materials have a limited shelf life and must be used within a few months and due to the relative high cost of polymers it is not cost effective for the vast majority of small operations to have a material that most would consider a “limited use” or “specialty” polymer. But Slabjack Geotechnical does! Why?

Three big reasons;

First – A two polymer approach provides for quick lifting of large slabs followed by much better filling of the void created when the slab was raised. The two polymer approach produces a more stable slab with lower resettlement issues and almost no possibility of generating cracks when void filling.

Secondly – Much of the work we do involves stabilizing slabs which have voids under them. Slab stabilization with a lifting polymer is difficult to do without fracturing the slab due to under slab point loading. Lifting polymers are designed to lift vigorously and not spread out more than two or three feet in either direction. Void fill and stabilization polymers are designed to rise very slowly and yet at the same time harden to a ridged high density foam. Due to the very slow rise the material covers incredible distances fully supporting the slab but not exerting huge compressive loads. As a result the slab is well supported without risk of slab fracturing.

Thirdly – We play an active role in designing our Slabjack rigs. We talk to the builders and work to find solutions such as “how can we as a company provide more than one material without the hassles associated with doing so” through these collaborative effort’s we have produced what we believe is the finest Slabjack rig in operation today. We now carry and regularly employ a “two polymer” lift and stabilization.

Finally, preventative slab stabilization can be done with very little risk of slab fracturing. In addition because of the characteristics of the polymer that we use as a stabilizing polymer we need very few 5/8″ inch holes to stabilize large slabs. As few as one hole every 100 ft.²

If you are concerned about your garage floor or your basement floor or your shop or warehouse floor. If you’re concerned about your driveway, your patio or your pool deck give the concrete raising and leveling professionals a call today.


Superior technology, Superior polymers, Superior results.