On Thursday, July 23, 2015 at 7:12:03 PM UTC-4, HerHusband wrote:
We are planning to pour a new concrete patio between our house and garage,
to replace pavers that have settled and correct the slopes around the
buildings. The existing pavers will be reused for a new patio out back.

We currently have a perfectly level 4'x8' concrete sidewalk between the
house and garage. It is 3-1/2" thick, reinforced with rebar, and has no
cracks. Each end rests on the buildings footings, so it is a very sturdy
little slab.

The new patio section will be 5-1/2 feet wide, or roughly 8" larger on each
side of the existing walk.

If I pour the new patio over the old sidewalk, the new slab would be about
2-1/2" thick on the shallow end and 3" on the thicker end. The additional
width on each side would be the full depth, 6-7" or so.

I am curious if 2-1/2" is thick enough to avoid cracks if I pour over the
old walk?

Also, will I have any issues where the new slab gets thicker on each side
where it is wider than the old sidewalk?

Thanks,

Anthony Watson
www.mountainsoftware.com
www.watsondiy.com

do the job right and only once.

remove old slab completely, dig out and replace the gravel that should be under the slab.

because the new slab over one thats still settling and will be thin... will crack, and once that occurs you will have to remove both slabs...