#slabjack

Will concrete crack when raised?

1855slabjack

One of the questions we are asked is “will raising our concrete damage it?” With over a thousand jobs under our belt and thousands of slabs raised the answer is generally no but it is something that is hard to predict. Some of the most gentle lifting on minor settling may generate a crack whereas a huge lift may not. Why?

Concrete of a thickness of less than 5″ is more prone to…

1855slabjack

Uretek(tm) originally developed polyurethane slab jacking back in the 1970’s,  since this method went off patent many other companies have opened to raise the level concrete slab’s using polyurethane foam. One of them, founded in 2011, is 1855slabjack which currently operates in Washington state and northern Idaho.

Many advances have taken place since then such as a vast increase in…

Municipal concrete road leveling by 1855slabjack

1855slabjack

Road leveling with Polyurethane got it’s start about thirty years ago and since then has become the preferred method of repair.

Prior to polyurethanes introduction, pressure grouting with concrete or Mudjacking was used. The problem with these materials and methods is primarily additional weight and “Pyramiding”  where the material doesn’t fill the void created when a slab is lifted…