There are special characteristics you need to look for when deciding you need to look for what foam to use for lifting and leveling concrete. Expansion is important, but what about set-up and cure times or adhesion? Do not fret, we are going to explain the in and outs of concrete lifting foam.
The Foam Reaction Time
Foam that reacts slowly is great for filling voids, but not for raising concrete. If material reacts to slowly, it can travel under and beyond the slab you are trying to lift and then expand. In this scenario, you will have created a bridge of foam, lifting multiple slabs. One this occurs, the only way to regain control over the slab is to cut through the layer of foam and attempt another lift again. Time and money is lost.
The Foam Adhesion
Concrete raising foam needs to lift concrete, but should not adhere to it. If raising a slab of concrete along foundation, foam can adhere to the foundation and lock the slab into place. For this reason, it is essential to have foam that will set-up with a tough exterior skin. The skin will eliminate adhesion to an adjacent concrete foundation or other slabs.
The Foam Pliability
Concrete lifters and levelers know that you raise a slab of concrete one side at a time. They also know that when you raise one side you may lower another side. This typically works to your advantage. The ability to rock back on foam that has already been installed is important. This is impossible if the foam is too rigid too soon. Proper foams must remain pliable for enough of a window that you can continue to work with it as you raise and level the slab. Good concrete raising foam should set up in 15 seconds and stay pliable for 15 minutes.
Edens Structural Solutions
You don’t hear much about concrete lifting foam. Usually it is something that is done by the professionals because it can be a hard task to do correctly. But, with patience and knowledge our workers will get it done the correct and proper way the first time. Call us today for any questions that you might have.