Problem with unlevel concrete slab.

[wroughtn_harv]

If the slab has a perimeter beam I'd consider (I'm assuming this is your nickel) doing a pier or three on that corner to preclude further deterioration.

Think of an "A". The two verticals would be twelve inch holes drilled down about ten twelve feet. Instead of a cross line dig a haunch or box at the top of the "A".

This configuration when properly installed makes movement up or down less likely. It's what engineers recommend around here for our clay when the foundations start moving.

In fact you could place a series of these piers around the perimeter along with some by your cross beams and raise the slab. It happens all the time. Clay soil moves.

 

[mahlers]

one and a half inches over a 49 foot diagonal length isn't much at all - especially for a garage/workshop. I wouldn't worry about it too much. I've seen some places that were *much* worse than that and you couldn't detect it without measuring equipment. If you're going to build the structure out of wood, you can always make a few measurement adjustments during the framing process to minimize the out-of-level, but honestly I wouldn't worry about it if it were me.

If the slab were cracking, it would be a different story.

 

[have_blue]

If contractors did it, I would make them pour a 3" overlay of fiber filled resin concrete.

If I did it myself, I don't know what I would do. If the low corner is in the rear, no water will ever get to it. If it's in the front, it will let water out. <shrug> /forums/images/graemlins/smile.gif