Hello all,

I would appreciate if you could share with me your thoughts, regarding
a remodeling I just completed on my 1 story ranch, slab/no basement in
St Louis MO: extending a 1 car garage into a 2 car garage.

They got rid of the old slab (on the one car garage) and then poured a
new one for the 2 car garage 19' x 19'.
After less than a month, it has now 4 cracks (cracks 1 to 3 intersects
in middle):
1- from North wall going South of garage: 5' long, from 1/4" to 1/16"
wide
2- from West wall going East: 11' long, from 1/8" to 1/16" wide
3- from East wall going West: 12' long, 1/8" to 1/16" wide
4- from Entrance (South) going North: 7' long, 1/32" wide

you can see pictures the
http://picasaweb.google.com/fredinst...JuMvNyXzfGIKA#

My contractors talked to the concrete guy and here what he is
proposing:
1/ fix the cracks with caulking etc...
2/ wait one year, if it gets worse: redo the whole slab, and if it
doesn't get worse: fix the cracks as in 1/

Not sure what my expectations should be ? Should I ask to redo it
now ?

All concrete cracks.

A 1/4" crack is unacceptable, in my opinion. Your pictures 8, 9, and 10
show excessive cracking. The others are what I call "hairline", and I
wouldn't worry about them. The small ones are expected.

Is there any elevation difference between the sides of the cracks? That
would mean trouble.

What kind of reinforcing did he use? I would want post-tensioned
cables, but those are rare in some parts of the country. Re-bar is the
least thing that should be in there. I've seen people do garage floors
with 4" wire mesh, but that's barely good enough for sidewalks, in my
opinion.

How thick is the slab?

--
Steve Bell
New Life Home Improvement
Arlington, TX USA