Retaining a DG Patio? (on tiny slope)

modern_miss(10A (15 Sunset) SF Bay Area CA)July 15, 2013

I want to install a decomposed granite patio in part of my lawn. The lawn is not perfectly flat, but the patio must be.
There is a 6-8" difference in grade from one end of the patio to the other. I wanted to use the same black metal edge banding to retain the patio (I've used it throughout my property) but it is only 4 inches tall - not enough to act as a mini retaining wall...
Is there anything else I can use in conjunction with the edge banding or independent of it? I don't really want to introduce a new material. Thanks for the advice.

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yardvaark

It makes a difference if the 6" - 8" grade differential is spread over 8' or 28'. What dimensions of patio will you be creating? Why do you think the patio must be "perfectly flat"? Even a DG patio needs some pitch to drain.

    Bookmark   July 15, 2013 at 8:32PM
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modern_miss(10A (15 Sunset) SF Bay Area CA)

The dimensions of the patio are 16' x 18'.

    Bookmark   July 15, 2013 at 9:42PM
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yardvaark

Could you create the patio as a landing such that at the high end the LAWN is retained by the metal edging and that at the low end the PATIO is retained by same (like it's a step)? That doubles the amount of grade differential you can accommodate with the edging. Combined with pitch of the patio itself (you did not answer that question but you must make drainage right ... or suffer) you should be able to make it work. In other words, at one end of the patio one steps down from the lawn to the patio. At the opposite end one steps down from the patio to the lawn.

    Bookmark   July 16, 2013 at 8:41AM
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