I am wanting to put a concrete base in for a hot tub in my garden. The garden slopes from the rear to the front. If the base is circa 2.5m x 2.5m the drop is approx 30cm. The base will have to be shallow at the rear and deeper at the front as I am building decking around it. A couple of questions surrounding it, (no pun intended). Is it ok to have a concrete approx 450mm thick at the front? Thin end, rear of the garden will be about 150mm thick. Should I use rebar to strengthen it? Any suggestions in framing as I will have a flat area where I have dug down, going into a slope.
Let me know if I need to post more detail Thanks in advance. Al
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