FAQ

Frequently Asked Questions

Concrete raising is typically about half the cost of replacing the same concrete. Ultimately, the cost of raising or stabilizing concrete is a direct reflection of how much leveling material the project will require. In general terms, concrete raising can cost between $2-$5 per square foot.

 

For example: a 10 ft. x 10 ft. section, that needs to be raised, figures to 100 square feet. This job would cost somewhere between $200 and $500 to repair. How far the slab is settled, if there are voids present, or if other sections need to be involved in the repair, will determine where in that scale the job would cost. This is why we offer FREE estimates, so our experienced crew member can come to your home or business, and provide you with an accurate estimate for completing your specific project.

Most residential jobs will take 2-3 hours and may be used immediately on completion. We do install concrete back into the holes where the injection took place. It is best to give those “plugs” 2-3 hours to cure prior to use.

The trailer contains a 160’ hose that can reach most areas from the street.
When our work is completed, it will be your responsibility to caulk the seams of the sections that were repaired, or backfill against any exposed areas to contain the material, and prevent future sinking.
Self-leveling cement caulk can be purchased easily at a home improvement store and works great for sealing joints. Using a silicone based, self-leveling caulk, is recommended. If a crack is very large, to use less material, sand can be used first between the crack, before applying the caulk on top.
Preventing water from going under the slab is key to preserving the repaired slab. Make sure that your downspouts are correctly placed, to assure water runs away from your concrete slabs or foundation.
Taking these suggested steps for preserving your raised concrete is a condition of your Midwest Polyfoam warranty.
Solid slabs of concrete can be raise and stabilized. Gravel areas or blacktop are unable to be repaired, and need to be replaced or re-installed to remedy settling issues. Slabs of concrete that are badly cracked may also be too damaged to lift.
If you are not sure if your concrete can be raised, call us for a Free Estimate. Raising settled concrete can be half the cost of replacing it with less damage to your landscaping and downtime. Our expert estimators will be able to assess and provide you with an accurate, FREE estimate for your project.

Concrete raising is typically half the cost of replacing your concrete slab. When large voids are present, this can increase the cost of the repair. While polyurethane material is more expensive than mudjacking material, the smaller hole size, lighter material weight, and fewer injection holes, make the investment in polyurethane over mudjacking well worth it.

Have a Question?

FAQ

Here are some answers to questions commonly asked by our customers

Still have a question?

Contact Us
Facebook-f Yelp Envelope

Overview

What is Concrete Raising Anyways?

Concrete raising is a specialty concrete repair technology. In essence, we attempt to lift a sunken concrete slab by pumping polyurethane foam through the concrete, effectively pushing it up from below.

The raising process generally starts with drilling access holes in the concrete, strategically located to maximize lift. These holes range in size from 3/8″ up to 3″ depending on the process used.

Initial material injections fill any under slab void space. Once the void space is filled, subsequent injections will start lifting the concrete within minutes. After the slabs are lifted, the access holes are patched and the work is complete. The process is rapid when compared to traditional remove and replace applications and is minimally disturbing to the surrounding areas.

Raising technology has several benefits, including:

  • Cost – can be significantly less expensive than new concrete

  • Timeliness of the repair – concrete is typically usable within hours as opposed to days with new concrete

  • Minimal or no environmental impact – mostly due to keeping waste out of landfills

  • Aesthetic – does not disturb the surrounding area and landscaping

Polyurethane Raising

What About Polyfoam Raising?

Foam raising uses Polyurethane in an injection process. A two-part polymer is injected through a hole less than one inch in diameter. Although the material is injected at a higher pressure than traditional cementitious grouts, the pressure is not what causes the lifting. The expansion of the air bubbles in the injected material below the slab surface performs the actual lifting action as the liquid resin reacts and becomes a structural foam.

The material injected below a slab to be lifted will first find weak soils, expanding into them in such a manner as to consolidate and cause sub-soils to become denser and fill any voids below the slab. One inherent property of expanding foams is that they will follow the path of least resistance, expanding in all directions. Another inherent property is these injections will not retain moisture and are not subject to erosion once in place.

Benefits of Expanding Structural Foam Leveling

  • Requires less clean up than Mudjacking or Limestone Grout Leveling

  • Smaller holes

  • Mobile units can reach areas inaccessible to truck-based equipment

  • Does not retain moisture

  • Does not erode when subjected to rainwater

  • Lightweight and will not cause additional settling

  • Environmentally friendly

Polyurethane Raising

What is the process?

When you level your uneven concrete using poly foam concrete raising techniques, ⅝” injection holes (Size of a dime!)  are strategically drilled around the areas where the concrete is sunken and requires lifting.

The concrete raising equipment is contained in a truck or trailer, and has a sufficient length of hose to accommodate most locations, the hose is extended to reach the area in need of repair

Once everything is prepped and the hose and materials are in place, the polyurethane foam is injected through the holes which fills the space underneath the concrete slab, using the concrete slab itself to drive the foam into the crevices, thereby lifting the concrete back to its original, correct level

Upon completion of leveling the concrete, the injection hole(s) are filled discretely with new cement, allowing you to use your surface immediately.

Our 3 Step Process

How Does It Work?

  • Step 1: Drill

    We start by drilling access holes in the sunken concrete, strategically located to maximize lift. These holes range in size from 3/8" up to 5/8".

  • Step 2: Pump

    A two-part polymer is injected through the access holes. The foam expands to lift the concrete to the desired height in as little as 30 minutes.

  • Step 3: Patch

    A two-part polymer is injected through the access holes. The foam expands to lift the concrete to the desired height in as little as 30 minutes.

Learn More

Overview

Deep Foamjection

Considered an upgrade to standard concrete raising, Deep Foamjection™  is the process of
installing foam deeper to increase the load bearing capacity of the soils.

• Repair unstable soils
• Installing a stronger foundation to support slabs and structures that settled
• Foam follows the path of least resistance and will fill weak areas
• Fills fissures and ground voids
• Fills voids holding water & displaces collected water
• Increase load bearing capacity of subgrade
• Permanent repair, foam never changes shape or
absorbs ground water
• Foam soaks into the weak soils and then expands, binding the soil and making it solid
• Does not leach chemicals into the ground

APPLICATIONS:

  • Seawall Repair
  • Soil Stabilization
  • Void Filling
  • Commercial/Residential