Quote:
Originally Posted by gr8fl4porsche
Golden rule is do it right or plan on doing it again.
If you are doing something like in the picture, the whole area is prepared the same. The edge brick merely replaces some of the concrete. If the slab is 4" thick, then the edges have 2" of concrete and 2" of brick. Prepare the base properly. There really is no such thing as overkill when building the base.
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+1
In the picture you posted, you can see the thickness of the concrete underlayment if you look closely at the curve, near the top, left of the picture. The brick is a 2" paver that is laid over the ~2" of concrete. Some contractors actually "key in" the edge by digging the base along the edge a bit deeper than the slab so it too will have a 4" concrete underlayment.
The brick strip near the bottom of the picture is done the same and is essentially the expansion joint between the slabs. I have seen this done in the same way, except it is a separate installation. The large slabs are formed and poured with a gap left between them for the expansion strip--sort of like "islands" separated by dirt strips. After the forms are removed, the strip is filled with a 2"base of concrete and pavers added. As mentioned above, the dirt has been graded and compacted at the same level as the slabs.