bobby1017
LifeTime Supporter
Concrete decking prep question:
I've read that proper preparation of the base is one of the keys to minimizing the cracking of concrete. I know it will crack, but there's no need for it to be more than typical if I can prepare properly.
Since we elevated the pool slightly to deal with drainage, something will need to fill up the empty space below the concrete. The concrete guy says they use 4" of cushion sand directly under the concrete, but what should I have them use below that? More sand? Road base and then the sand? No sand at all and only road base? Something else? The dirt that is there now is blackish clay. Then, once we choose something, do we need to compact it in layers before they pour the concrete? If they dismiss proper compaction, that's just being lazy, right?
Some pics to show how much needs to be filled. These spots are the worst:
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All the concrete that has been installed at my place has had 3/4 drain rock under it, since there are no fines in it it is 98% compacted when it is laid and doesn't need any more. Definitely with sand or road bed you need alot of compaction.