Updated: Mar 26

So, you’ve got a quote and they suggested polyfoam injections to fix your concrete. What does that even mean?! No need to worry! Here’s everything you need to know about it (and whether or not you should use it at home).

What are polyfoam injections?

Polyfoam is short for “polyurethane foam”, a chemical compound that is liquid but then it expands and dries into a solid, very strong foam.

Because it starts in liquid form, polyurethane can be injected and perfectly fills cramped, hard-to-reach spots underneath pool decks, foundations or sidewalks. And to seal it off (ha!) polyfoam is environmentally inert, meaning after application it isn’t dangerous to the environment, pets and humans.

Polyfoam injections can be used just about anywhere with these conditions: it supports, it levels up, it’s flame-retardant and water-resistant, meaning ADP polyfoam injections can even fix concrete near water without issues.

Benefits of using foam injection

Polyurethane truly is the best, fastest way of leveling concrete around the home. APD recommends using polyfoam to most of our clients because:

It’s cheaper:

Tearing up and redoing your sidewalks or pool deck can be very expensive, and the natural erosion process means new concrete can still sink eventually. Instead of tearing up your slab, polyfoam injection lets you keep using perfectly good concrete and fix sunken spots.

Foam is lightweight:

The main reason why concrete sinks and sidewalks start wobbling is because the soil underneath is weakened by erosion, compacted or settled. Polyfoam adds strength and stability without the weight of traditional mudjacking. This means your soil won’t degrade even more.

It’s clean:

The beauty of polyfoam injections is there’s virtually no clean-up after. Just some remaining dust can be quickly cleaned up with a broom.

It’s fast:

After application, you can walk or even drive over the fixed spots in just an hour. Unlike concrete, there’s no need to wait for days until it dries!

The choice is clear: if your concrete can be fixed with foam injections, it’s the best option!

How does it work?

Polyurethane injections stabilize your concrete. Depending on your needs, APD can either use injections to level a slab or even to bind the soil to strengthen the material below smaller concrete slabs. Although the exact procedure will change depending on the goal of the project, here’s how it works:

Step 1, Evaluation:

Depending on your needs, either an expert team or an engineer will take a look at the issues to figure out what are the causes.

Step 2, Designing an action plan:

APD uses different polyurethane types depending on the weight of the structure, the stability of the soil underneath, and other factors like nearby water. At this point, APD can correctly suggest the type of polyurethane foam that best fits your needs.

Step 3, Drilling and application:

Depending on your project, this can be a fairly quick process. Our team uses poly foam injections mainly with two different purposes: to fill voids in the soil beneath your concrete, or to stabilize the slab. Filling voids means your soil has already settled and there are “holes” or air pockets that will be replaced by polyfoam. For slab stabilization, we can fill the gaps but also inject polyfoam into the ground to bind the soil together and provide better support.

Step 4, Cleanup:

This is one of the best parts of polyfoam injections: cleanup is incredibly fast! Minutes after the job is done, APD only need to sweep the slab and that’s it. The mess is minimal because the concrete is drilled then patched.

Types of poly foam for concrete repair

Our team will use specific types of polyfoam injections depending on the location of the project, your needs and the state of the concrete. But regardless of the application, APD always use polyurethane foam that is 100% environmentally safe and 100% hydrophobic, meaning water won’t affect the job.

Most of the time, APD use one of these polyfoam types:

  • HF202: This is a hydro-sensitive polyfoam designed for jobs where water or consistent moisture is present. It sets up in the presence of water and maintains stability in wet environments. It’s great for residential concrete and sinkhole repair.

  • HF202FAST: Because it has a low density and quick reaction time, this polyfoam is used it to lift smaller cement slabs. Of course, it’s also hydro-sensitive and stable in wet environments.

  • HF402: This type is hydro-sensitive as well, but denser than the HF202 types. It also sets up when water is present, and maintains remarkable stability in wet environments like pools or ponds. Our team uses it for residential, commercial and industrial foundation and concrete repair.

  • HF402FAST: This one has the same strength as the HF402, but with the speed of HF202. This type of polyfoam is used for deep foam injections that need faster reaction times, so it’s great for lifting slabs.

Sunken driveway before polyfoam injection
Before APD polyfoam injection repair

Polyfoam injections: what can you fix?

If you’ve got a foundation with minor damage, wobbly sidewalk or your concrete slab has just seen better days, polyfoam injections are probably a great idea. Polyurethane injections are successfully used for:

Foundation and sinkhole repair:

If your home is showing cracks on the walls or there are sinking spots, polyfoam may be used to provide soil stabilization and give even more support to other foundation repairs like underpinning.

Trip hazards:

Uneven concrete slabs are just accidents waiting to happen. Our team uses polyfoam to stabilize the ground under any concrete slab, level it and patch up any cracks to keep everyone safe.

Pool deck repair:

Do you have an uneven pool deck? A few deep polyfoam injections will make your deck walkable again. We use polyurethane to quickly stabilize and raise concrete slabs around your pool so it looks as good as new.

Sidewalk repair:

If your sidewalks are unstable or wobbly, you’re probably dealing with settled soil. Polyfoam can fill those voids to provide a secure base and keep your sidewalks level. APD can also fix sidewalk cracks by lifting the slab with polyfoam injections and patching it up.

Crawl space repair:

Sometimes, cracks in your walls might not be related to your foundation but to your crawl space! APD uses polyfoam to strengthen the soil below your crawl space and give more stability to your entire home.

Seawall repair:

Since we only use hydrophobic polyfoam, it’s a great option to fix seawalls that could be exposed to the elements.

We hope this info gives you a better idea of what polyfoam injections are and how they are a great tool to fix your concrete. Have you ever used this option around your home?

House supported by helical piers before construction

Are you planning on building in Florida? Florida is a beautiful state, but soil stability could wreak havoc on your future building! No worries! APD Advanced Stabilization know how to create a solid base anchored to firm ground. Consider installing helical piers! Using pilings on new structures will boost load-bearing capacity and ensure long-term stability. Do you know about this method?

What are helical piers?

Basically, "helical" just means screw-shaped. These piers are also known as screw pier foundations or screw piles. Helical piers ensure your foundation is stable and ready to support your building. Helical piers can be used before construction or for lifting and supporting structures that are sinking.

Florida's loose and sandy soils make traditional foundation installation more difficult. Sandy and loose soils are not great for foundations because it tends to move and shift with the weight of the house on it. Helical piers will be placed in the looser soil until they reach a more stable layer. Installing helical piers before building can save you money and headaches from dealing with a sinking foundation.

Still wondering about taking the leap? Here are some of the reasons why APD Advanced Stabilization recommends them.

Benefits of using helical piers in new buildings

While helical piers can also be used after foundation problems appear, it’s almost always better to install them in the pre-construction phase. The benefits of using helical piers include:

Number 1 on blueprint background

Perfect for sandy soil

Florida is a beautiful state, but the loose, granular soil and high water tables can seriously limit the size and location of your building! This is especially concerning if you plan on doing a 2-story home or a larger building. However, helical pilings basically eliminate the possibility of severe foundation troubles down the road. By drilling the piers during the pre-construction phase, APD is able to anchor your building to stable soil no matter how deep or shallow it is.

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Protect your home from settling and sinkholes

This is the most obvious benefit! Helical pilings for new constructions provide a stable base for your home’s foundation. As a preventative measure, APD will be able to place the piers strategically throughout the entire area of the future foundation when installation is done. This ensures an efficient and safe distribution of the final weight and anchors your building to the stable soil deep underneath.

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Fast installation

With piling, there’s no need to wait weeks for concrete and deal with third-party delays. You also won’t have to wait for concrete to cure, and raining won’t alter the schedule either. Because steel components and hydraulic installation are used, APD can install helical piers fairly quickly and in any weather! Plus, once everything is drilled and done, you won’t need to wait. Piers can be used to their full load instantly, getting you building and above ground quicker than traditional construction methods.

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Great for heavy buildings

Are you planning on building a large commercial structure? Or maybe just a home with several stories? Whatever the case, heavy buildings in Florida need an especially sturdy foundation. Overall, helical piers improve the load bearing capacities of heavy structures and foundations, even in sandy Florida soils!

Helical pilings transfer the load from the soil surface deep into the ground, where the piers are anchored to stable soils. This technique has been used to support bridges, retain coastal walls and it will make sure your new building is as stable as possible.

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Precise application

Unlike traditional foundations, helical piling doesn’t use a one-size-fits-all approach. Instead, after evaluating the soil and the project, APD will create a customized plan that ensures pilings are drilled in active layers of soil at every load-bearing point. Plus, depending on the slope of the landscape and the configuration you need, They will organize the pilings to ensure efficient load distribution throughout. This lowers overall costs throughout, since your contractor won’t have to reinforce the foundation mid-way through the project.

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Effective in almost any terrain

Florida soils are notoriously difficult to build in. This gets even worse in new coastal buildings where the soil is extremely sandy and active. Luckily, helical piling can be installed in almost any terrain and even in landscapes that have different soil types under the same foundation. This means the application can be tailored to your needs, depending on the size of the project, the final weight of the structure and the quality of the soil at every spot.

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Ideal for limited access sites

Unlike traditional methods, helical pilings don’t need huge equipment to be installed. APD Advanced Stabilization uses hydraulic machinery of moderate size that can easily fit in smaller spaces or terrains with limited access. The entire installation process is also cleaner overall, since the only action is drilling into the soil. In our experience, helical piers are the best option for projects where accessibility and speed are key!

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Prevents soil disturbance during installation

Sandy, unstable soils can be easily disturbed during construction projects. This can make the soil even harder to work with, and provide an inadequate foundation to any building. By limiting the amount of soil that is being moved, APD will also save the existing soil as much as possible. This allows for installation even in so-called active soils (soils that are move with moisture).

Can helical piling be used for foundation repair?

Yes! This method quickly raises settled concrete and provides deep foundation support to unstable foundations. And given the considerably smaller equipment, and immediate effectiveness after installation, helical piers are one of APD's preferred ways of providing extra support to pre-existing buildings.

Final thoughts...

Helical pilings are an efficient and affordable option for residential and commercial projects alike! Especially in Florida’s problematic soil, this is the best way to properly anchor your building, stabilize and support your investment over the long term. Whether you are working on a new building or want to repair a pre-existing foundation, consider helical piers as an option!

Updated: Apr 9

Since your home is the biggest purchase you will ever make, it is something you should worry about if you are faced with the fact that your foundation might not be able to support your home. Your first question might be “How much is that going to cost me?”

Telltale signs your home needs foundation repair

You probably don’t know the condition of your house until you see damage in and around your home. A foundation that is weak or broken moves everything above it.

Exterior Damage

You may have heard someone say “the house is settling”. A house that creaks or pops is common with newer houses. A newer house is actually designed to handle a little bit of shifting during the first few years. However, if creaks and louder noises are heard every day, then you might have a bigger problem. Rarely does your foundation settle perfectly straight down. If your entire foundation begins to slope it will make the rest of your house unbalanced and un-level.

The slope doesn't have to be a lot to damage your house. A difference of 1½ inches could be considered severe damage! Minor damage on the outside of your house can easily be overlooked which is one reason why APD Advanced offers free inspections and estimates. Over time, you could begin to see:

  • your house separates from the foundation

  • gaps around windows and doors

  • cracks in between and/or through cinder blocks and bricks.

Interior Damage

As a homeowner, when you have foundation trouble you may notice the damage on the inside of your home first. The drywall within your home will be a lot easier to notice and will clash with your decor!

  • cracks in and around window sills

  • uneven and sloping floors

  • Doors suddenly become hard to open and close


Water is the common cause when it comes to sinkholes. They can be caused by frequent rain or bad drainage. washing the soil in the ground and making an empty space below. The sinkhole doesn't appear until gravity makes the dirt fall down to fill in the “air pocket”. Yearly changes can also make sinkholes as water freezes and thaws.

Unfortunately, these sinkholes could be under your house.

Some homeowners that had a sinkhole have described a hollow or a “thundering sound” under their home.

Types of foundation repairs

APD Advanced Stabilization uses different ways to fix foundations:

Underpinning Piers

Underpinning Piers are one of the more popular ways to repair foundations. These are placed below the earth until they hit solid ground and strengthen your house’s foundation. These piers will cost between $1,000 and $2,000.

Underpinning extends the foundation so it rests in a more helpful way to support the load of your house. Underpinning is generally applied when the existing foundation is shallow but works well up to fifty feet deep.

Helical Piers

Helical piers are like giant screws inserted straight into the ground where the soil is stable enough to support your home. They literally lift the home back to its original position and prevent your house from going deeper into the ground.

Using Helical Piers is a really fast and easy way to put your house back where it should be. Cracks in the foundation of your house will close. Windows and doors should be easier to use again.

Helical Piers usually costs between $1,500 and $3,000 for each pier.

Grout Compaction

This is the most common form of repairing big “air pockets” under your house. Grout is pushed to fill in large areas with pockets of space in the ground. Grouting is the best method to repair homes that have a lot of loose soil and sinkholes. Depending on how much grout you need to fill the air pocket, Grout Compaction could cost between $10,000 for smaller areas and $100,000 for larger areas.

Chemical Grouting with Poly Foam

Also called “slab jacking”, injecting foam under a sinking foundation or slab that is close to the ground surface. As the foam expands and fills smaller gaps, the sunken area “floats” into its proper place and seals the crack. Chemical Grouting costs between $400.00 and $1,000. The size of the crack determines how much Poly Foam Grout is needed.

Grout Injected Piers

Grout Injected Piers uses both piers and grout compaction methods. The Underpinning Piers are inserted into the earth and grout is used to make the area below more stable. This allows for more support if the soil is not stable enough to hold the weight of the underpinnings piers by themselves. Both the grout and underpinning piers could cost between $1,500 and $3,500.

So, how much does foundation repair cost?

If you search “foundation repair cost” you will find a lot of different amounts. The reason why is because there are a lot of different things that could change the amount. Foundation repair can be as small as filling and patching cracks to damages caused by something big like a sinkhole. The national average is about $4,500, but that does not include everything and prices change in different states. The average cost of any repair can range from $250 to over $10,000.

What influences foundation repair costs?

Since there are so many things that could be wrong with your house it will be hard to find an exact amount. There is a big difference in price if you fix a foundation crack or have to build a new one. A simple crack repair could be as little as $250 when a new foundation could be over $10,000. This is one of the reasons why APD offers free inspections and estimates.

Average costs based on the type of repair that you needed:


You need an engineer because they find out if your foundation has moved. They also find out if it is still moving and why it has moved. They make technical drawings and double-check all of the measurements. They also know what to do so you don’t have the problem again. Geotechnical and Structural Engineers cost between $300 and $1,500.


States have different ways to figure out how much a permit costs. Depending on where you live, permits for foundation repair can be between $100 to $1,000.


After all repairs are complete, an inspection needs to be done by a licensed a residential structural engineer to make sure the job was done correctly. This could cost between $350 and $1,000

Parts, labor and equipment

APD will only charge you for repair is on a “as-needed" basis. The parts, labor and equipment will be provided during the initial estimate.

Additional costs that might arise:

Additional Damage that could not be seen during inspection:

  • How damaged is the foundation? How loose is the soil under your house? Is it a small crack that can be filled or is it worse? The answers to these questions could affect the price.

  • The engineers or inspector may find additional things that either have to be removed or avoided.

  • There are problems under the foundation. Tree roots and vegetation, city utility wires and pipes caused by improper drainage that need to be taken care of first.

Foundation Repair Financing

Home Insurance

Foundation repair is rarely covered by most insurance. Typically, homeowners insurance only covers damage inside the home, not outside or in the ground. It would be best to call your agent for more detail.

Home Equity Loan

Similar to the renovation loan, if your house is worth more now than when you bought it, you have "equity". If your house is now worth more, some banks will loan money. Sometimes, a Home Equity Loan is called a "second mortgage".

Renovation Loan

A Renovation Loan can also be called a Home Improvement Loan. Simply put, a Renovation Loan is a loan you can get to improve your house. Since your foundation could be thought of as the most important part of your house, you may want to consider a renovation loan.

APD Advanced Stabilization Sinkhole Repair offers financing for those that qualify for short-term, fixed-time loans. APD Advanced Stabilization also offers Military discounts!

Repairing your home’s foundation before you sell

Sometimes the best choice for a homeowner to make is to move on. Consider the following:

  • If you find foundation issues during the sale of your house, you may be able to ask the broker if you can sell your home with the damage for less money to make up the difference.

  • You could sell your house “as-is” with a bad foundation but you may have difficulty finding a broker that will help you sell it. That leaves you with options of selling it by yourself or to a real estate investor, also known as the companies that buy “ugly houses”. After repairing your foundation you will be able to recoup the money from the sale of your home.

  • It usually improves resale value by giving the buyer peace of mind that the foundation is supported and has been looked at by engineers. The engineer report will stay with the home and can add value.

When you sell the house, ADP's Warranty is transferable to the new owner. The repair and warranty will add value to the home!

Lots can go wrong with foundation problems. In the long run, maintaining and repairing your home's foundation is a good choice. Even if it seems expensive, it is well worth the price. The convenience of many different financing options, the resale value of your home, plus your peace of mind, makes fixing a broken foundation well worth it. When you're ready to take that step, give APD Foundation Repair a call.