Category Archives: Foamjacking
The professionals at Polyjacking.com were recently called in to help with some floor leveling repairs that were needed on the campus of KU Edwards in Overland Park, KS. The campus was opened in 1993 and offers programs for undergraduates, graduates, and certificates along with professional and continuing education courses.
Floor Leveling and Void Filling on KU Edwards Campus
We were called in to take a look at an unlevel floor in one of the on-campus buildings. Upon inspection, we discovered that the floor needed to be raised by an inch due to voids that had formed under the building that had caused the floor to sink. The voids were around five feet below the surface and caused by a broken water line. Our experts leveled the floor and filled the voids, providing a stable foundation for the building and a safe environment for students and faculty members.
Please view the gallery below with some pictures from the work site. If you have any questions or would like more information, please contact us at Polyjacking.com.
Pretty much our entire service area has been the victim of non-stop rains and long-lasting flooding this spring. This weather is taking a toll on buildings, roads, fields, and people. The rain has to come to an end, eventually, right?
The Weather’s Impact on Concrete Slabs
You can do everything right when it comes to downspouts, gutters, and other drainage solutions, but when it rains this much for this long, every system can be overwhelmed. If you already had a water issue, the problem can be even greater.
When the ground becomes as wet and saturated as it has this spring, bad things can happen to your home or business. Basement walls can begin to bow or lean, due to pressure from the water-logged soil. Foundations can shift or sink as the soil weakens from all the water. Driveways, sidewalks, and patios can sink or buckle. These problems can range from being annoying to being a danger to peoples’ safety.
Small cracks may not seem like a big deal, but water doesn’t take much to be able to enter your home or business. In addition, a crack may be small on the side you can see, but the other side may be much bigger.
You may not have a problem right now with sinking or settling slabs but when the soil dries out, you might. The soil expands when it is saturated, then when it dries out, it will shrink, possibly removing the support your concrete surface needs.
Slabs can sink, not allowing water to drain correctly or causing tripping hazards. Voids can open under the concrete, causing the soil to wash away even more, creating dangerous situations.
If you suspect that your concrete is being damaged by rain problems, you don’t want to wait. The damage won’t heal itself and the needed repairs will only take more time and money the longer they go undone.
Polyjacking Solutions Work the Best
Fortunately, you have options available to help restore your concrete’s stability and strength. Some options are better than others, so make sure you take the time to choose the one that will provide you with the best benefits.
We believe that polyjacking is the answer for many types of concrete problems. In this method, polyurethane foam is injected beneath the slab. The foam expands, lifting the concrete to within 1/10th of an inch of the desired height. In addition, the foam is water-resistant, so it won’t wash away like the slurry used in mudjacking. The foam hardens and seals the bottom of the concrete, preventing any cracks from allowing water to seep through and filling any voids below the surface. The expanding foam also compacts any loose soil that may be under the slab.
The foam is lightweight (about 3-5 pounds/cubic foot) compared with mudjacking’s grout (over 100 pounds/cubic foot). The added weight of mudjacking can cause problems down the road as it combines with the weight of the concrete and whatever traffic is using the surface.
The installation process is another benefit that polyjacking has over other methods. In mudjacking, the holes that are drilled into your concrete are 3 inches or bigger in diameter, whereas the polyjacking holes are only 5/8″ wide. No heavy equipment is needed, so your lawn won’t be driven over with tractors and trucks and the area won’t be full of construction pieces. The foam takes about 15 minutes to cure, so as soon as that’s done, you can use the slab. Other methods may require days or weeks to allow you to use the concrete slab.
Don’t let Mother Nature’s temper tantrums damage your concrete slabs. Let us keep your driveways, patios, sidewalks, and more level and strong. Contact us to learn more about how polyjacking can help you and your home or business.
We won’t lie, the winter is usually a slow time for us. People get busy with family activities, dealing with the weather, and frankly, just hibernating. In addition, people may not know that they can polyjack their concrete during the winter months. We understand, there are a lot of winter days where outdoor activities are the furthest from our minds.
There are several reasons why you may want or need to have your concrete leveled. If the problem is dangerous or damaging your house or business, or you’re looking to sell the property, you may not be able to wait until the weather warms up. The reasons may override your schedule.
Is It Too Cold to Polyjack?
The temperature does factor into the success of your concrete lifting, but you may be surprised by other factors that come into play during the winter. Extreme cold can cause the ground to freeze solid making the concrete lifting difficult or downright impossible. The frozen earth can hold onto the concrete, sticking to the bottom of the slab and possibly causing the cement to break before it can even be raised.
It is almost impossible to perform mudjacking during the winter. The mud slurry that is used to raise the concrete can freeze inside the pump or hoses, making it impossible to move the slurry. Water is used to remove excess slurry, which isn’t an option in below freezing conditions. Due to the mess and danger of mudjacking, most projects are done outside, so the winter prevents that from being a common option for concrete lifting during that time.
Polyjacking can be limited by extremely cold temperatures, however, the limits are much less than those that impact mudjacking. The polyurethane foam that is used for polyjacking is created by combining two liquids. These liquids are heated in a temperature controlled environment, then injected through a heated hose. The foam is largely unaffected by outdoor temperatures, so it can be used effectively in cold weather.
If you are in need of concrete lifting and aren’t sure if it’s too cold out, just give us a call and ask! As you know, the weather could be below zero one day, then in the 50s the next. We’ll be able to let you know when we’ll be able to safely lift your concrete. We don’t want to cause more problems than you already have, so we’ll be upfront and honest with you in regards to the best time for your particular project.
Contact us today to learn more about polyjacking your concrete any time of the year. We look forward to providing you with a safe and strong concrete surface.
Most of the service area covered by Polyjacking.com has had a lot more rain this summer than usual. In addition to ruining a lot of outdoor plans, the rainfall may have wreaked havoc with the foundation of your home or business.
If your building wasn’t flooded, why should you be worried about the amount of rain in your area?
Water and Soil
When there is a lot of rain, it has to go somewhere. Some of it may run into storm sewers or creeks or other planned run-off areas. Most of the time, though, it goes into the soil until the ground is saturated. The water-soaked soil can cause problems for concrete slabs and foundations.
When the soil is oversaturated, it can exert a tremendous amount of pressure on its surroundings. This is called hydrostatic pressure and it can damage a foundation wall completely. If the foundation of your building is under the strain of hydrostatic pressure, the walls may begin to bow or lean. Walls and slab floors may show cracking as the soil and water pushes against the rigid concrete.
Water will take the path of least resistance and can erode the soil around it. When the soil gets washed away, it removes the support from around the foundation or slab. Voids can open underneath the concrete, allowing the slab to sink or crack.
If the rain falls too fast or the ground is saturated, the water can flood buildings or enter cracks no bigger than a hair. Water can weaken concrete and put your slab or building in danger.
Water Damage Prevention
There are steps you can take to help keep your home or business dry. You can make sure that your gutters and downspouts are clear and emptying at least 10 feet from the foundation. In addition, companies like Pro Foundation Technology, Inc. can provide you with waterproofing techniques to keep the water out of your building.
Some options that can help with surface drainage include drywells, gutters, and French drains. It is important that you have good surface drainage or the water you keep out of your building will just come right back, trying to enter your foundation.
To properly install exterior drainage, the outside of the building will have to be excavated, exposing the footing. Most reputable contractors will roll on or spray a polymer waterproofing product. A drain pipe system should be installed for continuous drainage. The drain can empty to a sump pump system or to daylight.
One of the most important parts of a waterproofing system is the implementation of a sealed interior drain tile system. Since the system is underneath the foundation, it is important that it is installed correctly from the start. Cracks in the walls and floor will need to be sealed with epoxy or polyurethane.
Sump Pump System
A sump pump system can move water out of the building, keeping water from flooding the structure. The system consists of a sump pump, a sump pit, and we recommend a battery back-up sump pump.
My Slab is Damaged, Now What?
So after all of the rain this summer you may be facing a damaged concrete slab or foundation, so what can you do? Before you call in someone to have the slab torn up, contact the experts at Polyjacking.com. We will come out and look at your property and determine if polyjacking is the solution you need. Polyjacking a slab is a LOT cheaper than destroying it and replacing the concrete.
The process is relatively easy and doesn’t require heavy machinery. Small holes are drilled in the concrete and polyurethane foam is injected under the slab. The foam expands, lifting the concrete and filling in any voids and cracks underneath the slab. The foam is water-resistant, so it won’t erode and the foam compacts the soil, making it more stable. By the time the equipment is removed and the area is cleaned up, you can use the slab. Curing time is about 15 minutes, so you won’t have to wait long to get back to business.
Contact the pros at Polyjacking.com to learn more about how using polyurethane foam to repair your concrete is the most cost-effective and long-lasting solution available.
When the ground under a concrete slab erodes away, it can cause a lot of problems. Homes with basements usually have the most problems, but voids can impact driveways, patios, sidewalks, and more. The erosion causes air pockets or voids to develop under the concrete slab, taking support away from the surface.
Causes of Voids
There are several different reasons that a void can occur beneath your concrete. Most of the time, it isn’t due to erosion, but other factors. Some issues are fast, others can take years to cause problems.
Soil consolidation occurs over time. This occurs when loose soil under the concrete consolidates or sifts down. If the soil is not properly prepared by being tamped down, this can occur. When the soil consolidates, a void can form over time.
Settlement is a natural occurrence that happens over time. It can occur with new construction or with a property that is a hundred years old. It all depends on the type of soil and weather patterns. Heavy rains or flooding can cause the soil to settle faster than normal. If the settling soil is in a large enough area, it can allow erosion to occur. Settling soil sets the table for a problem, erosion just makes it worse.
If water doesn’t drain correctly or there is new landscaping or other additions to the property, erosion can start after years with no problems. The water will run freely, washing out the soil and creating a void under the concrete. The bigger the void, the more damage that can occur.
Solutions for Voids Under Your Concrete
You don’t have to tear up your concrete to fix the problem of having a void. The best solution is polyjacking. High-Density polyurethane foam is injected through small holes into the voids. The foam expands, filling the void and sealing any cracks on the underside of the slab. The foam will not wash away and the slab is usable shortly after the foam is injected. Mudjacking is an alternative, but the sand-based grout can be washed away or not completely fill the void and you’re back to square one.
You’ll still need to take care of drainage problems, as they will continue to cause problems for your home or business. Make sure that water is draining correctly and away from the foundation or concrete area. The polyurethane foam won’t wash away, but the surrounding soil can erode. Let a company like Pro Foundation Technology assist you with waterproofing services.
Protect your property from foundation damage, trip and fall hazards, and sunken concrete by making sure the water is draining from your property. If you already have problems, let an expert like those at Polyjacking.com help you restore your concrete slab to the necessary height.
Trip and fall accidents are the #1 leading cause of injuries around the home, but should you replace your slab or have it lifted? Protecting your family, employees, and customers are all important, but you need to make an educated decision.
In the past, most people would just break up the old slab, level out the underlying soil and have new concrete poured in the same location. Today, polyjacking has become a much better option and has become more popular throughout the industry.
How Polyjacking Works
The polyjacking process is relatively simple and, though it doesn’t take long, it is extremely effective. The process uses little equipment, so you won’t have a bunch of trucks or other machines cluttering up your property. Small holes (5/8″) are drilled into the slab. The polyurethane foam is injected through the holes and expands under the slab, filling in voids, gaps, and cracks. The slab is raised to the required height and the foam seals the bottom of the slab, preventing more gaps and cracks from forming.
Once the slab is raised to the desired height, the holes are closed and the foam cures in about 15 minutes. Once the foam is hard, you can walk or drive on the slab, allowing everyone to get back to their normal day-to-day routine.
Benefits of Polyjacking vs New Concrete
We’ve told you about the process of polyjacking and some of the benefits, but what about replacing the slab with new concrete?
Some things to consider when thinking about new concrete:
- Concrete replacement can cost twice as much or more than polyjacking
- The new concrete is likely to have a different color than the existing slab
- The cause of the sinking slab may not be repaired
With polyjacking, there is little disturbance to your lawn and landscaping, whereas heavy equipment is needed to break up the old concrete and remove it. After the slab is removed, a mixer is brought in to pour the new slab, adding to the machinery required. Polyjacking just uses one truck or trailer to raise the slab.
If you are debating whether to go with polyjacking or pouring a new slab, contact Polyjacking.com to go over your options. We’ll be honest with you and show you the pros and cons of each method.
Have you noticed, especially after recent heavy rains, water ponding on your patio, driveway, or other concrete slabs? While there may be no visible cracks, somehow the concrete has settled or sunk, and water simply accumulates there, unable to run off. Besides being inconvenient and unsightly, it presents a safety hazard for your family and friends who walk across the concrete surface. The question is, “What should you do about it?”
Causes of Water Ponding
If there is no obvious crack or hole in the concrete which allows water to seep onto its surface, water ponding often is caused by incorrect grading of the concrete slab from the time it was poured. It is critical that the concrete is set up with a slight slope away from the house and foundation so that the water has an opportunity to run off into the yard, drain, or drainage ditch. If not, water will simply remain pooled on top of the concrete.
Frequently, natural settlement of the soil through the passage of time will cause the concrete to sink in such a way that water is unable to run off. For that reason, builders often recommend not building concrete patios until the soil around a new construction has had adequate time to settle.
Most often, water ponding is due to changes in the soil beneath the concrete slab. After cycles of wet and dry or freezing and thawing, the soil beneath the concrete may become unstable and develop pockets or holes. Eventually, the soil will not be able to support the concrete, and the concrete will actually sink into the holes beneath it. Naturally, after a heavy rain, water will pool into the lowest sections of the concrete.
Three Choices for Solving Water Ponding
There are basically three choices regarding what to do to repair a concrete slab that has water ponding. You can grind it, replace it, or raise it. The following information explains the three options along with their advantages and disadvantages. Hopefully, it will help you determine the best option for your sinking concrete.
Grinding involves milling off a portion of the good concrete slab so it matches the sunken slab. While it may eliminate a trip hazard, it does not solve the underlying problem and offers only a short-term solution.
The Truth about Grinding
While some companies are willing to grind off a layer of a good slab to fix a trip hazard, it doesn’t solve the underlying problem: what caused the slab to settle in the first place? Unfortunately, whatever caused the problem in the first place will simply return, usually within a year. If the company grinds the concrete a year later, the problem will simply occur the next year, and so on.
The bottom line is that grinding a good section of concrete never solves the root of the settling problem. It’s the underlying soil that caused the settling in the first place. After several years have gone by, the concrete will simply become too thin and crack, requiring the entire slab to be replaced. Besides paying for the annual grinding, the homeowner is now faced with the expensive option of replacing the concrete.
If you are extremely tight on funds, grinding could be a solution for you. Keep in mind that it is a short-term fix that eventually will require replacement of 2 or more concrete slabs.
Replacement involves tearing out the old concrete and building a new concrete slab in the same spot. It is very costly and disruptive and could lead to further problems in other parts of the structure.
The Truth about Concrete Replacement
Replacing a concrete slab is the most expensive method to eliminate a tripping hazard. Not only will you have the cost to tear out and remove the old concrete, but you will also need to pay for the grading, materials, and labor for the new slab.
Concrete replacement is also extremely disruptive. Besides creating loud noises with the jack-hammers, removing the old concrete creates a great deal of dust and mess. It also tears up the soil and landscaping surrounding the slab. Bringing in a cement truck to pour the concrete can also tear up the yard and make a mess. Also, it takes a long time for the concrete to cure before you can use it again.
Finally, concrete removal and replacement could damage other parts of the structure while the concrete slab is removed and the soil is disrupted. If they are not properly braced, adjacent decks, porches, crawl spaces, drainage systems, and the foundation itself could be damaged during the process, leading to an even greater expense.
Concrete Raising and Leveling
Concrete raising involves pumping either a concrete grout (mudjacking) or a polyurethane solution (polyjacking) through holes in the concrete slab to fill the voids underneath and raise the concrete.
The Truth about Concrete Raising and Leveling
Mudjacking lifts and raises concrete slabs by pumping sand-based grout beneath it. The force of the pump pushes the slab back into place. Unfortunately, it is very messy, takes a long time to dry, and isn’t a permanent solution because the conditions that caused the soil to shift under the slab still exist. It will only be a matter of time before the slab has slipped again.
Polyjacking, sometimes called foamjacking, lifts and levels slab foundations through injecting a high-density polyurethane foam beneath the slab through small holes drilled in the concrete. The foam expands and gently lifts the entire slab back into place.
Polyjacking has many advantages over mudjacking and other methods of concrete repair:
- It requires drilling only small holes
- The polyurethane solution is lighter than mud grout
- Polyurethane expands to fill in the holes and voids and stabilize the soil
- It takes much less time to apply and dry
- Polyurethane lasts a long time
- Polyurethane is waterproof and flexible during changes in the soil moisture or temperature
- Injecting beneath the slab does not disrupt surrounding structures, soil, utilities, or landscaping
- Poly foams are environmentally friendly, with up to 50% renewable and recycled materials
- Poly foams can be customized to each type of soil and conditions.
Initially, polyjacking is more expensive than either grinding or mudjacking. In the long-run, however, it is more cost-effective because it is extremely long-lasting and will not need to be redone in a year or two. Also, polyjacking not only stabilizes the soil, but it also strengthens it, so that the concrete is far less likely to crack or need to be replaced.
Contact Polyjacking.com to Eliminate Water Pooling
Polyjacking.com can raise your sunken slab to its proper level within an hour, allow you to use the slab almost immediately without waiting for concrete to cure, and provide a long-term solution to your problem. Contact us today for a free estimate!
Built in 1807 by John Harding, the historic Belle Meade Plantation developed into a 400-acre thoroughbred horse farm with its own train station, horse park, Greek-revival mansion, and housing for servants and former slaves. Today, Belle Meade Plantation includes 34 acres of its original property and several buildings, including the mansion and several outbuildings. It functions now as an educational resource dedicated to preserving Tennessee’s Victorian architecture, history, and equestrian lifestyle. Visitors can tour the buildings, shop, dine, taste wine, and enjoy special events held at this historic plantation. See their website at http://bellemeadeplantation.com/.
Belle Meade Mansion
The Belle Meade Plantation mansion began as a two-story Federal-style home, built in the 1820s with red bricks on a limestone foundation. On each side was a one-story wing. In the 1840s, William Giles Harding made additions to the original home and updated the style to Greek-Revival. The mansion features three floors with ceiling heights of fourteen feet on the lower two floors and eight feet on the top floor. It also contains a central hallway that extends through the three levels and a circular, cantilevered staircase with empire style spirals carved from cherry wood. Throughout the home are palladium wall niches for holding lamps at night. The home contains bedrooms for family members and guests as well as servants’ quarters.
Foundation Problems at Belle Meade Mansion
The limestone foundation at Belle Meade Mansion was having issues common with many older homes. It was sinking into the soil beneath it. After many years, rainwater had caused hydrostatic (water) pressure, creating cracks and water seepage in the walls and floor of the foundation. Heavy rains also caused water to seep beneath the foundation, and continued freezing and thawing had caused the soil to expand and contract, creating sinking and voids in the ground beneath the structure.
Because of the sinking and leaning walls in the foundation, it could no longer provide adequate support to the structure about it. Signs of foundation failure included sloping and uneven floors in many rooms of the old mansion. Because of the age and historic value of the building, the preservers of the property knew they couldn’t hire just anyone to restore the 200-year-old foundation without damaging the above structure.
Polyjacking Restores the Mansion’s Sinking Foundation
Because of their reputation for doing outstanding foundation repair, including work on prior historic buildings, the management of Belle Meade Plantation did not hesitate to contact Pro Foundation Technology (PFT) and their division, Polyjacking.com, from Kansas City. PFT and Polyjacking.com have more than 30 years of experience doing waterproofing, concrete, and foundation repair in Kansas City and throughout the Kansas and Missouri area. They use the highest-quality products from US manufacturer, Earth Contact Products (ECP) and have won recent recognition from HomeAdvisor for their quality service and workmanship.
Polyjacking.com made three trips to the historic mansion and were able to lift the sinking foundation and repair the underlying structure through the following steps:
- Using ground penetrating radar to detect voids, holes, underground structures, utilities, and other objects beneath the foundation
- Drilling small holes in the foundation floor in preparation for polyjacking
- Filling the voids beneath the foundation with polyurethane foam that expands into the voids and stabilizes the soil beneath the foundation
Not only were they able to lift and level the foundation without messy external excavation, but they also caused minimal disruption to the operations at the plantation and caused no additional damage to the structure or its contents. Belle Meade Mansion is restored to its former glory, is supported by a stronger foundation, is more structurally sound than ever, and will last for many years to come.
Contact Polyjacking.com for Foundation Repair
No matter if your home is over 200 years old or less than 20 years old, Polyjacking.com can lift and restore its foundation both quickly and cost-effectively so that it is better than new. Contact Polyjacking.com today!
Polyjacking Helps Anadarko Petroleum
Anadarko Petroleum operates six hydraulic fracturing stations on the Wattenberg Gas Field located beneath the states of Colorado and Wyoming. When an inlet pipe broke recently at its station just north of Denver, CO, injection fluid drained beneath the concrete slab at the station. This caused 3- to 5-inch voids to form under the concrete floor which left the concrete floor unlevel. The general contractor of their onsite service company, Open Range Services (ORS), knew he needed to find an efficient and effective solution for lifting and leveling the sinking concrete slab.
Why Mudjacking Wasn’t a Good Option
At first, the head of Open Range Services considered using the “tried and true” method of concrete leveling, mudjacking. Mudjacking forces a mixture of concrete and other aggregates beneath concrete slabs in order to lift and level them. After some consideration, he found that mudjacking would not only be too expensive, but that it would take a lot longer to apply. In addition, ORS would have the added cost of removing and replacing the entire slab instead of simply repairing it.
Why Polyjacking Is Best for Concrete Leveling
When ORS contacted Polyjacking.com about their concrete leveling process, it soon became clear that polyjacking was a superior solution for their situation. Steve Walker, general foreman for Pro Foundation Technology, Polyjacking.com’s parent company, shares:
“[Polyjacking is] a far superior method. Mudjacking means you drill large holes in the slab, mix the mud or grout onsite, and pump it using large hoses into the holes in the slab. It’s dirty, invasive, and time-consuming. Geotechnical polyurethane foam is much lighter- four pounds per cubic yard, versus 120 pounds or more using mud – simpler, cleaner to use, and much less expensive. We pump a two-part liquid system from a truck or pull-behind rig through a narrow hose into a gun used to inject the unique geotechnical foam beneath the slab to fill any and all voids. The foam expands, completely fills the empty space, raises the slab to level, then cures in place to become highly durable and [help] prevent further erosion at that site.”
Polyjacking is Easier and Faster to Install
Polyjacking.com uses a compound called TerraThane to inject beneath concrete slabs for lifting and leveling. TerraThane is manufactured by NCFI Polyurethanes, a Fort Worth, TX company. Polyjacking.com installs the polyurethane foam via the following procedure:
- Using radar equipment, find voids in the soil
- Drill small 5/8 inch holes into the concrete
- Use hoses to inject the TerraThane polymer
- Apply the right amount for lifting and leveling the concrete
- Complete appropriate clean-up (which is always minimal)
The complete process usually takes less than seven hours. Mudjacking, on the other hand, may require weeks or months to complete and creates a huge mess. For additional information on mudjacking vs. polyjacking, click here.
Open Range Services is Pleased with the Results
According to Steve Walker, Open Range Services was very satisfied with the final results, “They said they knew who to call if it happened again.” Things are running smoothly again at this particular Anadarko Petroleum hydraulic fracturing station, one of six located on the Wattenberg Gas Field, which is considered the ninth largest gas reserve in the entire United States.
Polyjacking.com Serves Commercial Customers Nationwide
Polyjacking.com has a nationwide reputation for its top-quality polyjacking products and services. They actually coined the term, “polyjacking”. It is a division of Pro Foundation Technology, a leading concrete repair company based in Kansas City, MO.
To learn more about Polyjacking.com’s concrete lifting and leveling services, contact us today!
What is mudjacking? Mudjacking is a concrete repair method used to lift and level sunken concrete. Since the 1900s, many businesses and homes have benefitted from mudjacking. It has been used to stabilize basement floors, driveways, sidewalks, patios, garage floors, and more. Mudjacking has been used for decades, so there are no surprises when you use this method. You know exactly what you are getting, for better or for worse.
In some cases, mudjacking can be a temporary solution due to its inability to resist moisture. As a result, the slurry may break down, wash away, and weaken. Because of these drawbacks, polyjacking has gained popularity over the years. If you have sunken concrete, we recommend polyjacking so you can save money and time in Missouri, Kansas, and the surrounding area.
Benefits of Polyjacking vs Mudjacking
So what makes polyjacking better than mudjacking? There are numerous reasons for using polyjacking over mudjacking.
Material and Drill Holes
Aside from not being moisture resistant, mudjacking uses a heavy cement-based mixture that weighs nearly 100 lbs per cubic foot. Many large holes are drilled through the slab so the material can pass through the slab, fill in the voids, and lift the slab back in place.
With polyjacking, polyurethane is used to lift and level sunken concrete to its desired height. Polyurethane weighs about 2 lbs, requiring fewer and smaller drill holes for the injection process. Within a few seconds, a chemical reaction occurs and polyurethane turns into foam. The foam expands and fills in voids under the slab.
Mudjacking can take 1-2 days to complete as opposed to polyurethane foam which cures within 15 minutes.
Long Term vs Short Term Repair
Since polyurethane foam is lightweight, it won’t burden loose or weak soils under the slab. This prevents future settling, making it a long-term repair solution. On the other hand, mudjacking is a short-term repair method because it uses thick material that overburdens loose soils.
Since mudjacking requires many large holes, more patchwork is needed. Mudjacking patched holes are more noticeable and less attractive than polyjacking’s patched holes.
Both mudjacking and polyjacking achieve the same results when lifting and leveling sunken concrete, but polyjacking has become a preferred method over traditional mudjacking. At Polyjacking.com, we offer polyjacking to permanently restore your settling sidewalk, driveway, patio, pool deck, and more. Contact us today for more information or an estimate.