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<blockquote data-quote="ndbwhunter" data-source="post: 173392" data-attributes="member: 1288">I'm planning on doing a stamped patio in my backyard, and can't figure out the right material to use for the subbase. The existing soil is a clay/sand mix and will provide an excellent base for the concrete, but I'll need to bring in some fill to get a few areas up closer to grade. Once the fill is compacted, I'd had planned on using 6-10&quot; of class 5 or gravel to make a good, solid subbase on which to pour the concrete. Do I have the right idea here, or am I way off base?Will a mixture of course rock (1/2-1&quot;), sand, and clay be suitable for a subbase? Is this essentially what &quot;class 5&quot; is? I have access to a gravel pit near my house and will save a ton of money if I'm able to go that route. If I'm able to use this mixture for the subbase, what type of compactor should I use? My research is telling me that a vibrating plate compactor will be the best for this gravel mixture. Can anyone with experience tell me otherwise?Keep in mind, my concrete experience is limited to quikrete and google searches, so any information will be greatly appreciated. A friend of mine will be doing the pouring and stamping, but I want to get most of the prep work done before he comes to town.</blockquote>

[QUOTE="ndbwhunter, post: 173392, member: 1288"] I'm planning on doing a stamped patio in my backyard, and can't figure out the right material to use for the subbase. The existing soil is a clay/sand mix and will provide an excellent base for the concrete, but I'll need to bring in some fill to get a few areas up closer to grade. Once the fill is compacted, I'd had planned on using 6-10" of class 5 or gravel to make a good, solid subbase on which to pour the concrete. Do I have the right idea here, or am I way off base? Will a mixture of course rock (1/2-1"), sand, and clay be suitable for a subbase? Is this essentially what "class 5" is? I have access to a gravel pit near my house and will save a ton of money if I'm able to go that route. If I'm able to use this mixture for the subbase, what type of compactor should I use? My research is telling me that a vibrating plate compactor will be the best for this gravel mixture. Can anyone with experience tell me otherwise? Keep in mind, my concrete experience is limited to quikrete and google searches, so any information will be greatly appreciated. A friend of mine will be doing the pouring and stamping, but I want to get most of the prep work done before he comes to town. [/QUOTE]

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