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JW:
If you do that, use SDR-35, or Schedule 40 with the hole facing down. Any time I have seen a rasied patio settle it is usually behind the wall, within the first year of being done, and if the installer used that black snakie jakeie junk, and it has collapsed. It would help your base keep dry with the rain and snow that will occur where solid gravel is going to hold moisture, freeze and crack...At least in theory anywho....
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Bill Schwab
In the year 1491, if the Naturescape Landscape Company did the site work in Pisa, Italy, they would not be calling it the "leaning" tower.
Encinitas, Ca. 92024
www.naturescapelandscape.com
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