[bwilly]

I am installing a stone block patio with 16" square blocks. Is it necessary to compact the stones after installation like you would with pavers? With the size of the blocks I am concerned that they will become unlevel if I compact them.
Bradley

[ballengerb1]

You do not compact them like you would bricks. Blocks this size are individually set with a rubber mallet, taping each as its laid until its level and even with blocks around it. What are you laying the blocks in?

[bwilly]

I am setting in sand with 5" of 1" minus gravel compacted underneath. You answered what I had thought because they are not going to move.

[ballengerb1]

I'd skip the sand because it never locks or sets. I'd use limestone screening on top of the 5" base

[AlamedaMarc]

Hi Bwilly,

Contrary to previous answers, I would definitely set your blocks on at least 1/2" of sand (set sand level using 1/2" black pipe). The sand is important for overall area surface leveling as well as providing for a forgiving setting substrate. Setting block/pavers directly onto gravel over the long term will result in an uneven top surface and eventual cracking of the blocks/pavers.

Good luck with your project!