Replies

1. 
   renosteinke | Nov 20, 2015 08:51am | #1

   A Bit Late To Worry

   Otherwise .... concrete is a trade, like any other. There's a surprising amount of detail to master, and local conditions matter.  You're paying the guy for his 'professional judgement;' let him use it.

1. 
   deadnuts | Nov 20, 2015 07:45pm | #5

   I agree. Most concrete subs have no idea how to detail concrete flat work for controlling movement; especially plastic shrinkage. Residential vertical work even worse. Doweled slip joints, expansion strip with tear away void capping (for proper caulking) and geometrically keyed edges are all effective strategies for long lasting flatwork.  IMO you need a very experienced sub or GC to plan and prep before the concrete is poured. Your options are very limited and largely ineffective after the fact. 

2. 
   florida | Nov 20, 2015 02:43pm | #2

   It will crack along the edge of the garage but it won't hurt anything. Not much different than if they had put ina control joint. If it bothers you wait a month, clean out the joint witha diamond blade on a grinder and fill it with self leveling sealant.

3. 
   DanH | Nov 20, 2015 04:46pm | #3

   The biggest danger is if you get frost heaving or expansive soil heaving near the joint.  Then the edge may get cracked up aa bit as the two pieces slide up and down.

4. 
   renosteinke | Nov 20, 2015 07:34pm | #4

   Are Slabs Connected?

   We have no way of telling if the contractor tied the slabs together, by epoxying pins in place between them.