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Old 09-21-2011, 12:39 PM   #16
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Drainage / French Drain Questions


Yes, to the positioning of it. Yes, to the tamping. No, to the the stone under it. That will only allow water to seep down around it and sit underneath it. Not sure where you live but if you have freezing weather, the water sitting under the channel will freeze and heave the channel up out of the ground and if the ice is close enough to the edge of your concrete, it will crack and heave it also.
Secondly, the channel that you showed a link to is way over kill. You don't need a steel channel. They make the same thing in vinyl that I'm sure is much cheaper. You'll have to shop around to find it.

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Old 09-22-2011, 11:29 AM   #17
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Sounds good I will try the trench drain then and just put it up against the concrete and tamp the dirt below it then pack in the dirt tightly on the other side. Thanks for the help with this I appreciate it.
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Old 09-22-2011, 04:42 PM   #18
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Sounds good I will try the trench drain then and just put it up against the concrete and tamp the dirt below it then pack in the dirt tightly on the other side. Thanks for the help with this I appreciate it.
I would recommend small rocks vice dirt.
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Old 09-22-2011, 05:25 PM   #19
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Then you have a place for water to seep down and under channel. Trapping it instead of sealing it off so it all runs into channel. MHO
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Old 09-22-2011, 06:37 PM   #20
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Then you have a place for water to seep down and under channel. Trapping it instead of sealing it off so it all runs into channel. MHO
To a certain degree, but dirt will wash away and could render the channel unstable, or clog it.
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Old 09-23-2011, 01:51 AM   #21
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Drainage / French Drain Questions


So this is what I'm thinking of doing let me know if you guys think this is a good idea. I'll dig everything out then level out the ditch tamp the dirt then mix up a few bags of concrete then pour a four inch slab that the trench drain will sit on then possibly put some concrete on the side of the drain that will be facing the lawn but leave it so the concrete on the side stops a few inches below where the grass will be so I can lay sod over it. Then the other side of the drain will be right up against the patio. If I do it this way it would seem the drain should hopefully never move. Let me know if you guys think this should work.
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Old 09-23-2011, 07:45 PM   #22
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Well, first, besides it being a lot of extra work, small patches of concrete tend not to last very long. They tend to get moved around a lot from freeze and thaw then cracks and eventually crumbles. Only large pours of concrete can withstand freeze and thaw for any length of time and even they eventually give in to nature. Public sidewalks move all over the place from freeze and thaw and are constantly being maintained. So personally, I wouldn't use the concrete because I feel the drainage channels won't stay in place for long. Also, if you place sod over the concrete, the sun will burn it up because it will heat up the concrete. Also, the sod has no place to draw moisture from. I think if you just use soil around the channels , pack it in nice and tight then plant grass seed, it should hold everything in place. And when you do have to re-arange things in time, you won't have to break up a bunch of concrete to repair things. That's just my opinion.

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