Installing surface water drainage

[coastie]

Anybody out there ever installed "Everhard" strip drains.I have a problem with seepage laying on my side passage for days before it eventually dries up,its usually about 12 mm deep.It seems that I will have to concrete saw a trench etc to install it.There is a standard floor grate right on the corner of my house to allow for stormwater drainage but it is too high for the seepage to drain to.Any suggestions would be welcomed.

[soundman]

You think you've got problems.
I'm flogging my way thru a raft of drainage issues here too.

If the water isn't draining into your pit check the heights and your falls before you do anything.


remember water flows down hill.

A dumpy or a waterlevel will tell you the truth.

I found that several of my pits were not at the correct height and some of my drains weren't falling properly.
Much digging & resetting required.

Check out your levels
you may get away with a simple spoon drain.

My main concern with the plastic drains is that they just sit there. the don't maintain the integrity of your slab & I don't believe they seal.

[jamesy]

Here is a standard- for drainage make your fall a minimum 1 in 100, below that and you've got problems.

If you're side is soil based then try digging a drainage trench( 300mm deep will do) with the recommended fall as far away from the area as possible, ie into your stormwater pipe or gravel pit. Lay a bed of 20mm drainage gravel in the trench then lay a socked agricultural pipe in the trench to your outlet. top the trench up with 20mm gravel and turf over the top -problem solved.

If your area is concrete then find the low point and put a 300mm pit in at this point and use a hard pipe or socked agi and complete the same as above, just remember that the pipe that comes out of the pit should be a an inch or so above its bottom so that any sediment stays there and can be cleaned out .

Both should help with both seepage and surface water.

Check the prices and I think that you will find that the everhard spoon drains are fairly expensive and you'll need to get the fall anyway.