My back yard is sand, not dirt (I live in Florida), do I need to compact that sand before applying crusher run?

I am planning on building a deck outside and know I need a compacted base of crusher run before laying anything. My question is, since the crusher run will be placed on sand (I live really close to the beach), should I (A) run the tamper over that sand before adding and tamping the crusher? Or (B) can I just dump the crusher run on top of the sand and tamp it down?

Answer:

I vote for B. Let's not get carried away. It is a deck. You should compact the gravel and that will compact the whole thing.

You need to dig down, compact what's under the sand, apply the crusher on top. If you only compact sand, your deck will collapse after a heavy rain, especially Florida's regular hurricane flooding rains. You can push some of the sand back over the crusher to help fill in any gaps.

You need to consult a structural engineer to see what your ground and support.

just dump on top of the sand ... keep it filled and you will not have grass or weeds ..........