Garage Floor Repair

[RonM3]

My garage has cracked and one corner is sinking. I am thinking of having it repaired. Has anybody had this done? If so what type of repair? I am looking at the folks who drill a hole and then inject a substance that lifts the floor back in place. Does this last?

 

[wssix99]

How long has it been like this? Mud jacking can work and will last, but if the source of the problem is still there and you continue to see settlement, then you'll just end back in the same place you are now.

Any idea why you had the settlement?

 

[RonM3]

The garage is about 20 Years old. If I had to guess this started happening about 2 years ago. The drop isn't bad, it wouldn't even be noticeable if it wasn't for the garage door. The ground beneath the garage has a lot of rock so it should be mostly stable.

 

[Cyberbear]

The unstable earth below needs to be made firm and the cause for the recent settlement dealt with. Pumping something underneath sounds like a short term temporary fix. I suppose you could try it and see what happens, but once fixed properly there is a liquid that is cement based and can be used to level and repair older concrete floors. I hired a flooring company to do the work and it came out very well and is still holding up after 10 years use.

 

[wssix99]

The garage is about 20 Years old. If I had to guess this started happening about 2 years ago. The drop isn't bad, it wouldn't even be noticeable if it wasn't for the garage door. The ground beneath the garage has a lot of rock so it should be mostly stable.

If it was stable for a time and then started recently, I'd look to see if there are any drainage problems that could be undermining the soil under the slab. If you have a problem like this, whatever repair you do could be undermined and you'd just end back to square 1.

 

[kbs2244]

As said, check for any recent changes.
Mud jacking, by its very nature. will find and fill any cracks or voids, but it will not fix any continueing problems.

 

[cowboyjosh]

My old house was a production home in Highlands Ranch, CO built in 95. I had owned the home for about 2-3 years back in 03-04 when I started parking a SUV in the 3rd car garage space. After a winter of snow dropping off the truck I had one part of the garage floor heave and another sink almost 2 inches (expansion joints were not sealed, water would get under the slab). Mud jacking fixed it before I sold the house. The reason I told the story is just by changing the way the garage is used or whats parked in it can cause something like this to happen.

 

[chase237]

I had the same issues, our was caused by poor drainage and no slope on the driveway. I found signs that the floor had been mudjacked before but it didn't hold because the drainage issues were never addressed.

I chose to go with a poly foam injection lift. It's in an area of the garage that does not see the weight of vehicles and we're addressing the drainage with a new driveway. It's not perfect but it's better than it was.

All these fixes won't fix the problem if there is poor compaction under the concrete. The best fix is tear it out and re-pour. I went into eyes wide open knowing I may have to revisit the issue at some later date. Right now keeping my fingers crossed. It's just a garage