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Old 07-12-2011, 09:31 PM   #1
rcnut223
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Default Help!! New Garage Floor Cracked..

My Dream Garage had the Garage Floor Poured On Friday and On Sunday the Floor started to Crack

It has been determined the cement dried to quickly. Now a crack runs back and forth either side of the cut line in the center of the floor. 6-8 inches on either side of the cutline. 28 x 36 pad.

The floor has Pex tubing in it. Piece are chipping off now and it seems the cracks are spider cracking it's been getting worse since exposed to rain.

The contractor want's to cut either side of the failure grind an inch off the floor pour epoxy and then paint the floor so it looks good.

What is the correct fix for this?
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Old 07-12-2011, 09:33 PM   #2
Saxon
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Default Re: Help!! New Garage Floor Cracked..

UCoat it all!
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Old 07-12-2011, 09:37 PM   #3
junk yard kid
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Default Re: Help!! New Garage Floor Cracked..

its all gunna crack eventually. Get a discount and fix it when it becomes a problem.
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Old 07-12-2011, 09:38 PM   #4
long island vic
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Default Re: Help!! New Garage Floor Cracked..

it will not fix itself....if you had gone to a good mason you would not have this problem,,,a shiney truck and matching t shirts does not make a company...epoxy is like putting a piece of tape on a windshield crack,,,dried to quick is not knowing the temp the slump was it wired,,,a lot of factors that mean it should all come up
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Old 07-12-2011, 09:41 PM   #5
rcnut223
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Default Re: Help!! New Garage Floor Cracked..

Shouldn't he tear it out and start over?
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Old 07-12-2011, 09:42 PM   #6
badshifter
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Default Re: Help!! New Garage Floor Cracked..

Quote:
Originally Posted by rcnut223 View Post

What is the correct fix for this?
Beer.

There are two types of concrete, cracked concrete, and gonna crack concrete. Unless you use a high PSI concrete and big finishers.
If there is metal in the slab (and there should be) the cracks will annoy you but should not be structural. Did they use aluminite or any other accelerator in the mix?

On the other hand, if the contractor is admitting a problem with the pour, it's on him now. He's not gonna coma back in 6 months or a year. The time is now if he is admitting fault.

Make sure you and your contractor agree on warranty issues before the job is done, and paid for.

Good Luck!
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Old 07-12-2011, 09:42 PM   #7
Hitchhiker
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Default Re: Help!! New Garage Floor Cracked..

Quote:
Originally Posted by rcnut223 View Post
Shouldn't he tear it out and start over?
If he wants it right, yes. all those little cracks would annoy me.
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Old 07-12-2011, 09:42 PM   #8
grits
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Default Re: Help!! New Garage Floor Cracked..

OK, hold on a minute, first of all, cement is the powder form and only turns to concrete when you add the water, second, concrete does not dry, it cures. It take concrete 28 days typicaly to cure, what you are seeing are called surface cracks and do not penetrate the slab. When you poured the concrete you probably noticed a lot of watery mix or slury coming to the surface, this is normal. Now depending of the weather conditions at time of pour, be it hot and windy, the slury on top will cure out at a rapid pace, it ain't pretty but it doesn't mean you have permenant damage to the slab.
So, tell me what it was like the day you poured and when did you pour it?
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Old 07-12-2011, 09:43 PM   #9
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Default Re: Help!! New Garage Floor Cracked..

Sadly if it dried too fast then obviously the mix was wrong for the pour conditions.

If the floor has a proper amount of screen or rebar in it, the crack should not go any further.

That is also providing the base under it was properly prepared as well.

I would not attempt to do any repairs to it for at least a year down the road to see where it ends up, continued cracking etc.

After that filling with flexible cauck and floor coating will hide it.

There is no real proper repair beyond removing it and starting over.

I once did a 32' x 40' floor for a shop, 12"x 10' around the outside for a foundation. 6" thick floor and rebar and screen throughout.

3000 lb mix for the concrete , poured all in one pour and floated and finished smooth. No cuts, all one piece.

That was in 1995, and that floor here in Alberta has never cracked not even a small one.
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Old 07-12-2011, 09:43 PM   #10
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Default Re: Help!! New Garage Floor Cracked..

When my garage floor addition was poured in Nov all looked good then it had some cracks about 2 months later, they took it all out and did it over. A little thicker the second time they said but now I am getting some small cracks again but nothing serious. Have it done over again
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Old 07-12-2011, 09:44 PM   #11
Saxon
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Default Re: Help!! New Garage Floor Cracked..

Your in Wisconsin not a earthquake area or something.

Options Wait to see if it settles more. Fix it now under warranty (if any).

It's the earth it'll settle. Doesn't look like a sink hole to me and just a causality of new construction.

Not that major in my opinion.
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Old 07-12-2011, 09:44 PM   #12
Slick Willy
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Default Re: Help!! New Garage Floor Cracked..

not sure of your building codes, but if youre building with a permit the inspector may not approve it. make them rip it up and redo! at no cost to you!! including the mesh and pex tubing!!
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Old 07-12-2011, 09:49 PM   #13
Saxon
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Default Re: Help!! New Garage Floor Cracked..

Funny from the picture you posted it looks like old concrete not new by any means.
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Old 07-12-2011, 09:49 PM   #14
grits
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Default Re: Help!! New Garage Floor Cracked..

Just for the record, I have been a custom home builder in Texas for 35+ years, I have poured over 4000 slabs in my time, I've seen it all, poured slabs in weather below 20 degress and above 100 degress.
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Old 07-12-2011, 09:49 PM   #15
F&J
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Default Re: Help!! New Garage Floor Cracked..

Quote:
The contractor want's to cut either side of the failure grind an inch off the floor pour epoxy and then paint the floor so it looks good.
Just me, I'd let it do what it's going to do, then plan the next move. This soon after the pour seems hasty, and temporary. I am not an expert on this, just going by what I've seen floors do.

From what I see there, it does not look doomed.
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Old 07-12-2011, 09:53 PM   #16
rcnut223
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Default Re: Help!! New Garage Floor Cracked..

Ok it 95 degrees on the day he poured it . the light cracks you are referring too are in the slab as well. This crack is opening and closing with the heat of the day pieces are breaking off (the light cracks are not)
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Old 07-12-2011, 09:54 PM   #17
grits
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Default Re: Help!! New Garage Floor Cracked..

Quote:
Originally Posted by Saxon View Post
Funny from the picture you posted it looks like old concrete not new by any means.
Wrong, concrete will turn colors as it cures, from the picture it looks like it's still green, you'll notice change in color as time goes by during the curing process.
I will agree with the proper prep work, Is this a rebar and mess slab or post tension slab?
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Old 07-12-2011, 09:56 PM   #18
grits
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Default Re: Help!! New Garage Floor Cracked..

Quote:
Originally Posted by rcnut223 View Post
Ok it 95 degrees on the day he poured it . the light cracks you are referring too are in the slab as well. This crack is opening and closing with the heat of the day pieces are breaking off (the light cracks are not)
What do you mean by that, corners, where?
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Old 07-12-2011, 09:58 PM   #19
grits
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Default Re: Help!! New Garage Floor Cracked..

Are you talking about the chips at the scored areas?
As seen in the picture?
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Old 07-12-2011, 09:59 PM   #20
Saxon
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Default Re: Help!! New Garage Floor Cracked..

Huh grits I've never seen that before. I;m no concrete expert but I framed a few houses and done concrete work. I be worried if that's a new floor then.

Floor looks worn to the aggregate already...
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