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Anyone no anything about French Drains?

Discussion in 'Irrigation' started by Zachary McCollum, Mar 13, 2012.

  1. Zachary McCollum

    Zachary McCollum LawnSite Member
    Posts: 10

    I have a customer needing help with flooding in her back yard and she wants some french drains put in. Any advice on how to do that would be much appreciated! And how to price. Thanks.

    Zachary McCollum
     
  2. SoCalLandscapeMgmt

    SoCalLandscapeMgmt LawnSite Bronze Member
    Posts: 1,699

    The drains themselves are easy. Most importantly though, your best move would be to involve somebody who is qualified to design and oversee the installation of the drains. In the long run it could save your a$$ in terms of liability!! Trust me. I know people who have been there. Getting dragged into a $13mil construction defect lawsuit because you did some simple french drain work can and does happen!!
     
  3. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690

    What he said!
     
  4. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,298

    Agreed. Drainage can be as simple as moving water from gutter downspouts or extremely involved like lowering a high water table. If you can't identify and quantify why the area is flooding, then you have nowhere to start.
     
  5. Zachary McCollum

    Zachary McCollum LawnSite Member
    Posts: 10

    Thanks to both of you for the advice!

    Zack
     
  6. Zachary McCollum

    Zachary McCollum LawnSite Member
    Posts: 10

    Thanks Kiril!

    Zack
     
  7. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,045

    Yup, as stated before, you can get sued big time if the work is done right OR wrong.
     
  8. Zachary McCollum

    Zachary McCollum LawnSite Member
    Posts: 10

    I will def get someone more qualified to take a look at it. I am insured, but I don't want any problems. I am 18 and going to college to do this kinda stuff for the rest of my career, so I don't want to have any problems getting started.

    Zack
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,595

    I agree with everyone (for once). Most septic designers are real qualified to do the design. The best advice I was ever given for a French" (or curtain) drain was to go to hardpan and then six inches. "D-boxes" should be used to pick-up surface water and channel it into the drain lines. 1/4" per foot drop should be used for the drain lines. Trenches should be backfilled with drain rock, with a layer of filter fabric on top. When on slopes, I've used visquene to wrap the the trench on the downhill side. Hope this helps. :)
     
  10. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,045

    Last edited: Mar 14, 2012

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