What is the difference between
Foam Jacking and Mudjacking?
Both methods achieve the same results:
Raise and Support sunken or unstable concrete slabs by drilling holes and pumping material under the slab.
Settled concrete is commonly a result of poor soil conditions below a slab. Because of this Polyurethane has become a popular repair methods because the material is so lightweight it will not further burden the already weak soil.
Mudjacking uses a sand based material that is infused with portland cement or simply just MUD. This slurry is hydraulically pumped under the slab to fill voids and raise the concrete. Mudjacking material weighs on average 100 lbs per cubic foot.
Polyurethane Concrete Lifting uses a polyurethane foam material that is injected under the slab. When the components of this material are mixed a reaction causes the material to expand. This expanded foam fills any voids and raises concrete. This material will never lose density. After it is installed it is permanent and weighs about 2 lbs per cubic foot.
After concrete has been raise the only visable evidence that the slab has been repaired is the holes. For this reason Polyurethane has gained HUGE popularity because of the nearly invisible 5/8″ holes that remain after the job is completed.
Mudjacking involves drilling a series of 1″ holes in a slab of concrete so the material can be pumped under the settled slab.
Polyurethane concrete raising drills a nearly invisible 5/8″ hole and the process calls for considerably fewer holes than traditional mudjacking.