Even though we sell to contractors, we get a lot of calls from property owners or managers with slab issues after their internet searches lead them to our website. Part of my job consists of talking to them to determine if their situation merits forwarding to one of our contractors in their area. What follows are the most common questions I hear from property owners or managers interested in slab lifting, along with the most accurate answers. This is extremely valuable info for any polyurethane slab lifting contractor.

1. How strong is your slab lifting foam?

AP Lift Foam can support up to 14,000 lbs per sq ft. That's in a free rise foam. Underneath a slab it will be many times stronger than that.

2. Have these products been specified?

Yes. In the later 1990s various Departments of Transportation started testing high density foams underneath bridge approach slabs. These polymers have proven to hold up and are now used by just about every DOT In the United States to support highway loads.

3. How long will the installed foam last?

Polyurethanes are made from derivatives of oil and natural gas. Their lifespan is similar to that of plastics. They have high chemical resistivity and should last a hundred years.

4. What if you over lift?

The lifting is done in a very controlled manner, moving the slab millimeters at a time. A trained slab lifter is usually able to get within one eighth of an inch tolerance.

5. Can the foam lift a very thick slab or a slab with a piece of equipment on it?

Yes that is not a problem. If you run the math and apply PSI (pounds per square inch) over square feet you'll realize that it doesn't take very much pressure to lift something heavy.

6. Is the foam safe for the environment?

Our polyurethane foam does not shrink, degrade, or leach anything into the environment. We are one of only two companies that has an NSF certified (approved for contact with drinking water) structural lifting foam.

7. How is the foam used in a warehouse or industrial facility?

In industrial facilities or warehouses, polyurethane foam is used to stabilize rocking slabs, to lift sunken slabs, to fill voids beneath slabs both in and outside the building, and to fill massive voids that occur right behind loading dock walls.

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