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Polyurethane VS MUDJACKING
What is Polyurethane Foam
Polyurethane Foam is specifically formulated, designed and manufactured for lifting concrete. The manufacturers provide different densities of foam to allow for the best application of polyurethane foam injection.
We use a 2 part Polyurethane Foam that is injected at around 1,300 psi and begins expanding in 8 seconds. Our foam can expand up to 24 times its size in volume and lift at a rate of 50 lbs per square inch...All in 15 seconds!
Difference between Polyurethane Foam vs. Mud Jacking
Mud Jacking is an art not a science. Meaning that with Mud Jacking you are lifting with a liquid so it is not always predictable. You may be planning to lift in a specific area but if there is a low area somewhere else under the concrete then that is the area that will build up pressure and lift first.
With Polyurethane Foam you have to create more smaller diameter holes but this allows you to lift at the exact place that is needed. This material also expands in 15 seconds to this allows you to better control the amount of lift.
So Polyurethane Foam Injection is a Science not an art.
Advantages of Polyurethane Foam over Mud Jacking
- The foam compacts the soils under the settled area as it lifts the concrete.
- The foam also seals up the cracks in the slab which help prevent water intrusion.
- The foam in is a lighter but stronger material so you are not adding more weight to an area that has already settled. (3 lbs per sq ft compared to 150 lbs per sq ft of Mud Jacking material)
- With the injection of polyurethane foam you can create foam columns that allow for a deeper repair under the concrete.
- The poly helps to prevent water intrusion from the exterior which could have created the initial concrete settlement.
What Polyurethane Foam CANNOT DO - This is not to be used to replace a deep foundation system.
Polyurethane Foam Injection is a shallow system, thus it is not a long-term repair because you are still bearing the load of the concrete in the active zone of the soils. If you are planning on supporting heavy loads, then a deep foundation system should be utilized like Helical Piles or Concrete Piles.
If your residence or building has been lifted with a deep system and you still have sagging interior floors, then polyurethane foam can work to lift the concrete.
We can lift anything that has at least a 3-4 in. concrete base.
- Concrete Sidewalks to prevent Trip Hazards
- Concrete Driveways that have settled due to Drainage Issues.
- Concrete Curbs that are allowing water to stand at your front sidewalk.
- Concrete Pool Decks
- Porches, Stoops or Steps
- Interior Floor Slabs - Non Load Bearing.
- Anything Concrete