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Derekpro2013 07-24-2013 01:18 AM

Problems with new construction driveway
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Hi everyone, I just had a new house built in October of 2012 and i am having problems with my driveway. The garage is in the rear and the driveway is 80'x12'x4" before the turn into garage. The 80'X12' part has cracked in 4 1/2 places all the way to the bottom of the slab, i called the builder and they patched it up but it has opened again in all sections again. There are only two control joints in that span and they are only a 1/4 inch deep, also i just noticed in a picture before the driveway was poured that they didnt use any sub base material only on the sidewalks and approach, i guess required by the city. They used wire mesh as support. Also another concern on the part that turns into the garage they put the concrete all the way up to the garage and touching the house with no material in between for expansion, they just used rebar to attach it to the foundation. The driveway was poured after the house was finished in December. The garage also has alot of cracks but i just painted it black so i would not see them. The weird thing is the builder is trying to lay the blame on the cement supplier for a faulty mix, i see it as bad workmenship by them, what do you guys think. I really dont know what to do, this is my first house and i am worried the driveway is going to fail. My moms two other properties have no concrete problems, her house is over 30 years old with no cracks in garage or drive, even in a new 20'x10' concrete patio done a few years ago by fly by night contractors and no cracks. Her other property had a driveway done by a old man and his son and no cracks also 5 years ago, he wasnt even a business just knew how to do it. Thanks Derek Mcallen TX

Derekpro2013 07-24-2013 01:45 AM

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I forgot also to mention that the turn driveway into garage pounds water when it rains and when you clean it, should i be concerned? Thanks Derek

Derekpro2013 07-24-2013 01:47 AM

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Another picture

joecaption 07-24-2013 06:58 AM

Please go back and add your location to your profile, go to Quick Links to edit.
Just need to know what state you in for better advice. from the concrete guys on here.

Derekpro2013 07-24-2013 07:02 AM

mcallen tx, profile updated

joecaption 07-24-2013 07:47 AM

Give the concrete guys a chance to wake up or get back from work tonight.
I can tell you that was not built like any driveway I've ever seen in my area, but your local soil conditions are not going to be the same so different methods may have been called for there.
We would have used an expansion strip not attach it to the house. That slab moves up and down as the soil conditions change with the rain.
We do not even use wire mesh in a slab that thin. Just reinforced concrete.
I'm not a concrete finisher, just the guy that builds the building and over see's the sub's doing there thing.

concretemasonry 07-24-2013 08:36 AM

Not enough control joints in the driveway and they are not even close to be deep enough. Around here, the joints are all sawed much deeper late the same day (as soon as it can be worked on without surface damage) after the pour or very early the next morning. - A crack parallel to and close to a "control joint" is a sure sign of and ineffective joint that is not deep enough to work, but that was a shallow tooled joint put in for appearance purposes only.

Probably not a concrete mix strength problem unless it was ordered too wet or water was added. Even 3000 psi (3" slump) could work. Standard here for a driveway is 4000 psi (3" slump), because that is lowest strength a good supplier will even deliver for a driveway for durability purposes and eliminate issues later.


Derekpro2013 07-24-2013 12:06 PM

I saw the concrete delivery slip today it says total delivery of 29 cubic yards at 3000 psi, that would be for 90' X 12' driveway from the street, 18.5' X 20' rear turn driveway/patio, 108' x 4' Sidewalk and 3.3' X 35' porch walk way. 1997 total square feet.

Derekpro2013 07-24-2013 12:07 PM

at 4" thick

concretemasonry 07-24-2013 03:20 PM

Added water will lessen the quality and increase the quality/strength. Was there a place on the delivery ticket for the drivers to note if water was added on site? - That sounds like an invoice and not a delivery ticket and the supplier and the contractor would have the acyual individual delivery tickets with signatures and added notes.


stadry 07-24-2013 05:05 PM

your bldr's blowin' smoke up your ***,,, but, at least, he does have his sub's back,,, had the control jnts been cut at proper time AND depth, there'd be no random cracks - dick's exactly right :thumbsup: from what you post, there are not enough joints NOR are they in the correct places,,, i expect someone came back the next day on the way to another job OR after they work'd another job,,, by then its WAY too late to cut jnts.

same thing in the garage,,, painted or not, you'll eventually have trouble to the point YOU may have to replace the floor,,, why use wire mesh ? its only 4" thick,,, it MUST be installed @ the vert mid-point of the slab + / - 5% - that's .2",,, you think the conc jabonies even know how to measure .2" after tramping thru all the mud pulling up the mesh w/hooks ? why use tie bars ? no specifying authority recommends steel in a normal driveway slab,,, however, IT its used, they do specify 2" above AND below it - that makes your driveway 4 1/2" thick, NOT 4"

hopefully you haven't paid for the work,,, any dummy could've done this work - you're paying for good work so hold his ***** to the fire :eek: there's no acceptable repair other'n replacement imn-s-hfo :whistling2:

as conc never cures at any predictable rate, joints are diamond sawed when the conc dictates - NOT when the contractor chooses to do it :no: wtr running into the garage is atrocious,,, the garage slab is NEVER tied into the driveway, either :no:

no matter how you slice it ( pls excuse pun ! ), this is a p-p job :censored:

concretemasonry 07-24-2013 05:34 PM

The joint shown in the photos was tooled during constriction for appearance or convenience and not meant to be effective in the direction of the shrinkage and cracks.

Wire is not bad if the contractor is very conscientious about managing the crew. It (the wire) is usually spaced too closely for goofs with big feet and not the ability to think. Rebar at 14" or so on center gives enough room for the guys to tip toe around and can be supported without sagging too much.


joecaption 07-24-2013 05:36 PM

And what do you think about the 3000 LB.
Only place I've seen it used is in a basement floor.

stadry 07-25-2013 03:34 AM

3K's light imn-s-hfo but that's me,,, much prefer 4K & will even add air sometimes tho atlanta's not known for extended temps below 32f :no: its tough even getting a plant to mix 3K here

jomama45 07-25-2013 06:32 AM

Call the ready-mix supplier and have one of their Quality Control guys come take a look. They should be able to educate you on some of the problems with the driveway. For one, they put in maybe 5% of the control joints that are needed to successully contain cracks.

As for the water, it doesn't look like you have gutters on the eaves, which would help immensly with that situation.........

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