1.   Be sure to put a bonding agent on the old concrete before skim-coating.

2.   A better, but much more expensive cure, is to break up the old concrete, remove it, and pour a new slab.

3.   Can I put a new concrete driveway over old concrete?

4.   If you do put down brick in sand, it is better to remove all the old concrete.

5.   If you want to put in brick instead, that too is possible, right on top of the old concrete.

6.   If you do put down new concrete, make sure the old concrete is rough enough to hold the new layer.

7.   Now, five months later, dark spots are appearing on the old concrete, and the paint is blistering and bubbling.

8.   Others said to take away the old concrete and pour new concrete on the ground.

9.   That way is to apply a bonding agent to the old concrete, then apply a thin coat of sand-mix concrete.

10.   The most important thing if you do it yourself is to apply a bonding agent to the old concrete so the new will stick properly.