Poly foam is lightweight and will not cause settlement like Mudjacking grout
Facts show that the main cause of concrete settlement is due to disturbed soils during initial home and building construction and not due to weight. Main building structures far exceed the weight of concrete slabs on grade and are footed on undisturbed soils. These soils generally do not settle. However, concrete slabs that surround a structure such as concrete pool decks, garage floors, patios, porches, and walkways that are prone to settlement failure.
A know fact is the difference of 100 pounds per cubic foot between Mudjacking grout and poly foam is insignificant as undisturbed soils generally support 1500 to 3000 pounds per square foot.
Poly foam is environmentally friendly
Poly-Isocyanate, the chemical name for poly foam is a two-part product consisting of a part A and part B. When mixed there is a chemical reaction. This reaction is known to off gas and generate heat. This poly foam product which has been used for concrete raising has a history of flammability and self-combustion. There are documented cases in which these poly foam fires have resulted in health-related lawsuits and the National Institute of Safety and Health, NIOSH, requires the use of a respirator and gloves along with skin and face protection. The CDC has stated that poly foam has a history of reactions including death.
In addition to separation costs and added recycling costs during concrete replacement, poly foam cannot be accepted at concrete recycling facilities.
Poly foam products have been shown to come with a long-term environmental impact. The use of poly products such as plastic bags, bottles, Styrofoam’s have resulted in plastic reduction and bans. Further use of these products is predicted to come at a much higher financial and environmental cost going forward.
Poly foam does not wash out like mudjacking grout
It is a known fact that poly foam products do no biodegrade and can take hundreds of years to break down. However, tests have shown that a properly mixed and tested Mudjacking grout with Portland cement can withstand long term water resistance. Cements have a time-proven history of durability against weather dating back thousands of years.
The actual concern with all concrete leveling repairs regardless of the product used is to correct all water issues. A down spout discharging next to a slab, roof water, or a lack of drainage from poorly pitched grade will not only result in washout of any base soils but can also increase the possibility of frost damage in colder climates.