Leak Seal and Void Fill of Detention Pond Pipes in Duluth, GA

Recently we got a call from the President of a home owners association in Duluth, GA.  The bottom of a large culvert pipe in a detention pond had decayed to the point that it was leaking massive amounts of water into the surrounding soil.  A critically important standpipe was then threatened by a soil void caused by this water leak.

Ground Consolidation Services injected Alchemy-Spetec’s AP Lift 430 high strength polyurethane foam through the bottom of the pipe (see photo included with this article) to form a leak seal barrier and return the culvert to its full functionality.  We then injected the foam into the void around the standpipe.  Filling this void and compacting the surrounding soil created a solid impermeable mass that will support the standpipe for years to come.

This waterway leads to the Chattahoochee river, so we made sure to use a foam that was NSF approved for contact with drinking water.  Environmental safety is a top priority for GCS.

The home owners association President was thrilled that this repair was accomplished without large machinery and/or the full replacement of the pipes.  GCS saved them lots of time and money!

GCS Lifts Sunken Steps for Multiple Homeowners Association Members in Hoschton, GA

A neighborhood homeowners association member in Hoschton, GA recently found GCS via Facebook.  Multiple homeowners in the same general area had problems with their front steps sinking.  GCS was called in to perform an inspection and provide a free repair estimate.  The estimator determined that repairs were possible and GCS crew were called in to do the job.

GCS crew used a mechanical jack to lift the steps close to level. They then injected Alchemy-Spetec’s AP Lift 430 to finish the leveling process and secure the steps in place.  GCS has performed this procedure for seven homes in the same subdivision so far.  All steps have been leveled perfectly. Residents so far have been very pleased with the results.

Commercial – Industrial Slab & Concrete Repair

The photos in the graphic to the right depict two nightmare scenarios that no commercial – industrial property owner or manager wants to endure:

  • A Collapsed Slab
  • Cracked Concrete

Gound Consolidation Services can repair slabs in danger of collapse, lift sunken slabs, and repair cracked concrete. The state of the art polyurethane, polyurea and epoxies we use allow us to offer you the following advantages:

  • No Excavation
  • No Demolition in Most Cases
  • Clean, Fast, and Environmentally Friendly
  • No Heavy Equipment Required
  • No Permitting Required in Most Cases


Settled Slabs Cause…

  • Damage to Material Handling Equipment & Loads
  • Uneven/Unsafe Racking & Shelving
  • Slab Joint Damage (Spalls)
  • Trip Hazards & Litigation Risk

Concrete Cracks Cause…

  • Slab Deterioration Over Time
  • Rocking/Moving Slabs
  • Damage to Material Handling Equipment & Loads
  • Trip Hazards & Litigation Risk


Stabilizing & Lifting Slabs:

Slabs are stabilized and leveled with high strength polyurethane resin. In optimal conditions, slabs can often be lifted to within 1/8” of their original level. Polyurethane slab lifting is much more efficient and a lot less expensive than demolishing and replacing the slab or structure.

Repairing Cracks:

Cracks are repaired with epoxy or polyurethane mortar. The mortar protects the edges of the joints from further chipping and spalling while absorbing the impact of hard-wheeled traffic (forklifts and pallet jacks).

Rebuilding Joint Nosings:
(Spall Repair)

Chipped joint edges, or “spalls”, are removed and the concrete is cut to a 90° angle. The joint nosings are then rebuilt with high-strength polyurethane or epoxy.

Filling Joints:

Deterioration of original joint filler can be repaired with high-strength polyurea. After any chipped edges or spalls are repaired, the deteriorated joints are thoroughly cleaned out. Polyurea is pumped in and then shaved to be level with the surface. The polyurea is tack free within two minutes and traffic ready in an hour. It protects the joints from further deterioration and protects the joint nosings from further damage.

The Ground Penetrating Radar Advantage

What Dangers Lurk Beneath Your Valuable Structures?

The Deep Look wireless ground penetrating radar system uses a patent pending unique triple frequency antenna design to create the most accurate image possible of the area beneath your valuable structures. Conventional single frequency antenna GPR systems cannot deliver the same level of clarity. Ground Consolidation Services will use the Deep Look GPR to take remove all uncertainty and take the guesswork out of the diagnostic process. A crystal clear understanding of the problem provides the best foundation for accurate, durable and lasting repairs.

Free Site Evaluation & Job Estimate

The Deep Look wireless ground penetrating radar system uses a patent pending unique triple frequency antenna design to create the most accurate image possible of the area beneath your valuable structures. Conventional single frequency antenna GPR systems cannot deliver the same level of clarity. Ground Consolidation Services will use the Deep Look GPR to take remove all uncertainty and take the guesswork out of the diagnostic process. A crystal clear understanding of the problem provides the best foundation for accurate, durable and lasting repairs.

Lifting Sunken Steps and Stoop in Avondale Estates, GA

Ground Consolidation Services recently received a call from a real estate who was referred by an engineer.  The real estate agent was prepping a house for sale and noticed a dangerous trip hazard: the enter front stoop was sinking into the ground.  This was definitely a problem the agent needed remedied before the closing.

The GCS crew leveled the entire stoop via the process of polyurethane slab lifting.  This, procedure is more cost efficient than replacing the concrete and less messy than “mudjacking” with cement grout.

With the stoop solidly back in place for the long-term, the real estate agent was able to proceed with another lucrative sale!

Patio Leveling in Alpharetta, GA

Sunken Patio Repair

Ground Consolidation Services recently leveled one end of a concrete patio (with brick overlay) that had settled due to unstable soil.  As you can see from the “before” photo in the included image, a significant gap had appeared between the patio and the bottom edge of the siding on the house.

The suburban family at this residence knew one thing for sure: the siding wasn’t moving upwards.  So, their patio must have been sinking into the ground.  They found Ground Consolidation Services and asked for one of our free – and very thorough – site evaluations.

Polyurethane Concrete Leveling

Once the scope of the problem and the cost of the solution were both clear, they hired GCS to repair the problem.  GCS technicians used Alchemy-Spetec’s AP Lift 430 polyurethane foam to gradually and carefully lift the patio back to its exact original level.  See the contrast between the “before” and “after” photos.  This powerful polyurethane foam has been used to lift entire small buildings, so there is no doubt about its strength.  Needless to say, the owners of this house were delighted to have their patio repaired at a fraction of the cost of replacement.

Garage Floor Depression Leveled in Acworth, GA

Unstable Garage Slabs = Danger

The weight of the average automobile is currently around 4,000 pounds.  When dangerous voids or unstable soil undermine your garage floor slab, you are parking that two ton machine on a surface that could possibly collapse.

Lest you think we’re exaggerating, take a look at this 5th anniversary video of the floor collapse at the National Corvette Museum.  The video contains a recording of the 911 emergency call, juxtaposed against security cam footage of the concrete slab collapsing – taking some Corvettes with it.

Polyurethane Slab Repair

A homeowner in Acworth, GA recently noticed that his garage floor was depressed in the middle – bowing down towards the center of the garage.  He wisely called Ground Consolidation Services.  Our crews used Alchemy-Spetec’s AP Lift 430 polyurethane foam to stabilize the soil deep beneath the slab and also to lift it back into place.

See the before and after photos: The string was secured at either end of the garage – revealing the 1.75″ depression in the middle of the slab before the repair AND the almost non-existent depression after the repair.

Pool Deck Slab Stabilization & Lift in Hampton, GA

Unstable Pool Deck

Ground Consolidation Services recently sent a crew to repair a pool deck in Hampton, GA.  As you can see from the before and after photos, the concrete slab was cracked and had started separating.  Due to the unstable soil that caused the concrete to break apart, part of the deck was pulling away from the pool liner.  If the liner had breached, the pool water would have started seeping into the soil, further destabilizing everything.

Polyurethane Pool Repair

Fortunately our crew arrived to start the job before the liner was breached.  Our skilled technicians used Alchemy-Spetec’s AP Lift 430, a high-strength polyurethane foam, to lift the sunken part of the slab back into place.  Restoring the slab to its original state relieved the pressure on the pool liner, preserving the integrity of the pool and the surrounding soil.

Lifting & Stabilizing a House Foundation in Dunwoody, GA

A family in Dunwoody, GA recently began the process of refinishing their basement. The contractor they hired quickly noticed that the corner of the house was sinking into unstable soil. He wisely recommended that they find a deep soil lifting contractor, and they ended up contacting GCS.

When major structural elements are sinking, the repair procedure is different from your standard slab lift process in which high-strength polyurethane foam is injected just beneath the sunken slab. The deep structure lifting procedure consists of injecting high-strength polyurethane foam deep into the soil beneath the structure, solidifying and lifting the substrate – and leveling the structure in the process.

In this case, the GCS crew drove four temporary injection pipes eight feet down into the supporting soil (two injection pipes on each side of the sunken corner). They injected Alchemy-Spetec’s AP Lift 430 beneath the foundation and raised it back into place. The owners were glad to be back on track with their basement renovation project.

Warehouse Slab Stabilization & Lifting in Atlanta

GCS recently repaired a cracked and slightly sunken unstable slab at a large warehouse in an industrial print shop. Their warehouse crew is constantly moving heavy rolls of paper around via forklift. Unstable soil caused slab damage right in the middle of a very busy section in the middle of the floor, where four separate slabs intersected.

With this 8 by 14-foot area out cordoned off, forklift traffic had to be rerouted to the point that the pace of business was adversely affected. Not to mention the fact that there was now a danger area in the warehouse that management had to worry about. Unstable slabs like this are often in danger of complete collapse. After doing their research and comparing their options, management contacted Ground Consolidation Services.

GCS performed soil testing with ground penetrating radar and a probe (dynamic cone penetrometer) to determine the extent of the damage. It turned out that there were around 3 feet (1 meter) of loose, unstable soil beneath the entire sunken area of the slab. Further collapse was definitely a possibility. GCS used Alchemy-Spetec’s AP Lift 430 (a high-strength expanding polyurethane foam) to raise the slab back to level and stabilize it. The lifting/stabilizing process only took about 1 hour.  The crew then performed some concrete repair with Alchemy-Spetec’s Epicol INJ LV epoxy mortar to reconnect the cracked slab elements back together.

Management at the print shop was thrilled with the quick repair.  The epoxy was cured in just 24-48 hours, and then they were back to business as usual!

Driveway Leveling in Covington, GA

Not too long ago we received a call from an elderly couple in nearby Covington, Georgia.  Their driveway was cracked in half and there was a significant drop in the middle of it due to unstable soil.  One of them had already tripped because of this sunken slab.  Luckily there were no injuries, but they weren’t about to risk another close call.  (Not to mention possible damage to their car.)

GCS General Manager Steve Taylor showed up in person to inspect the slab and provide a free estimate for leveling this dangerous trip hazard with high-strength polyurethane.  Impressed by the prompt reply and the detailed free estimate, they decided to hire us to repair the slab.  An experienced GCS crew quickly and efficiently leveled the slab with Alchemy-Spetec’s AP Lift 430 foam.

After inspecting the repair work, this couple had made it abundantly clear that they were 100% satisfied with the results.  (See the before and after photo included with this blog post.)  From dangerous trip hazard to perfectly level in one day.  Not bad.