New home Garage floor crack

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Calisun

New member
During walk through, a couple of hairline cracks were found on the garage floor in our new built home :(. Builder says they are by nature . Should we insist the builder fix it ? and how to fix it. I'd like to hear TI member's opinion. Thx.
 
Yeh, it's normal.

That's just the nature of the concrete.  Due to various factors during curing and settling, there always will be hairline cracks.  And due to the post-tension cable method used in your concrete slab, the integrity of your concrete foundation is still sound despite of hairline cracks.

I remember a nice quote from NYT: "There's two types of concrete, the one about to crack and the one already cracked."


Edit:  Found NYT's original quote here, I was close. :)
NYT said:
There are two types of concrete: concrete with cracks and concrete that hasn't cracked yet.



 
Calisun said:
Inc, thanks. Epoxy coating the whole garage floor will solve the cosmetic issue, right?

Yes, the epoxy coating will cover it up nicely.  The company will even patch up the concrete crack before apply the coating. 

Does your garage have the scored lines like the pic below?

My previous home's garage is just a big flat continues surface without any scored lines and it display many hairline cracks.  My new home and many of new home here in Irvine have scored line in the garage floor to divert the hairline crack away from the main surface. 


speckled-epoxy-quality-epoxy-llc_1086.jpg


 
lnc said:
Calisun said:
Inc, thanks. Epoxy coating the whole garage floor will solve the cosmetic issue, right?

Yes, the epoxy coating will cover it up nicely.  The company will even patch up the concrete crack before apply the coating. 

Does your garage have the scored lines like the pic below?

My previous home's garage is just a big flat continues surface without any scored lines and it display many hairline cracks.  My new home and many of new home here in Irvine have scored line in the garage floor to divert the hairline crack away from the main surface. 


speckled-epoxy-quality-epoxy-llc_1086.jpg

Yes, mine has scored lines. Thank you so much for the inputs. The info makes me fell better.  :)
 
Same thing happened to us as well. We requested builder to fix the crack but after they patched it, it looked much worse.  We ended up putting in epoxy.
 
Tomoe said:
Same thing happened to us as well. We requested builder to fix the crack but after they patched it, it looked much worse.  We ended up putting in epoxy.

Tomoe,

Do you know what kind of material your builder used to patch?  We requested builder fix too but want to make sure the patch material will accept the epoxy coating later.
 
I had a number of hairline cracks in my new driveway at my final (1 year after COE) escrow.  Builder said they wouldn't fix/patch them unless they were minimum 1/4" wide.  Not a big deal but a bother since I know they are there.
 
Calisun,

I am not sure what material the builder used but it was significantly darker than rest of the cement.  The patch work was so sloppy that after it was finished, the hairline crack became much more noticeable (a thick jaggered line measuring an inch wide as opposed to a hairline crack which was barely seen before).  Epoxy went on fine. No problem there.  In retrospect, I would not have the builder fix it in the first place.

 
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