French Drain

Discussion in 'Heavy Equipment & Pavement' started by 4 seasons lawn&land, Apr 26, 2012.

  1. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    Im wondering when you should line the trench with fabric and when you just need to wrap the pipe.
     
  2. bobcat_ron

    bobcat_ron LawnSite Fanatic
    Posts: 10,089

    Don't wrap the pipe, there are several law suits here pending due to the fabric plugging on the big-O pipe getting clogged and failing, we all have to use perf'ed PVC pipe.

    Best bet is wood chips or straw to cover the drain rock. Or just use wood chips instead of drain rock, we did 50 acres with that method and the drains just wick the water out even faster than conventional drain lines do.
     
  3. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    wow, really? Wont the wood rot into soil eventually?
     
  4. bobcat_ron

    bobcat_ron LawnSite Fanatic
    Posts: 10,089

    Nope, it's sealed up, and it rots 20 times slower. We used spruce chips, about 1" with no saw dust.
     
  5. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    thats neat. I do want to grow lawn over this one though. Its easy access and nearby materials and dumping excavation material. Any ideas of price for about 100 ft?
     
  6. bobcat_ron

    bobcat_ron LawnSite Fanatic
    Posts: 10,089

    I don't price, I just do and dig.
     
  7. jbrockmann

    jbrockmann LawnSite Member
    Posts: 50

    Thats a funny coincidence. Starting a french drain project tomorrow. Not using the sock on the pipe, but we are using filter fabric to line the ditch and cover the rock. Toping with new fresh topsoil for seeding or sod (home owner to finish). Agree with Ron, if at all possible don't put dirt on top. They actually work great when the water can get down to the pipe!
    I've researched pricing for drains on here. Some guys were saying $10-15 a foot. I don't see how they can do it so cheap. I'm leaving dirt on site, regrading another area, and it's still $20-25 a foot. Guess it all depends on labor costs, depth and finishing touches?
     
  8. AWJ Services

    AWJ Services LawnSite Platinum Member
    from Ga
    Posts: 4,276

    French drains are designed to move standing water. When you disturb the soil by digging the trench that is what allows the water to get down to the pipe. The disturbed soil will allow the water to move through it. You also need to use washed stone in the trench as the fines from regular gravel can block the pipes. No filter clothe is needed around the pipe. You should top the gravel will with something to keep the soil from washing down into the gravel.
     
  9. JNB Construction

    JNB Construction LawnSite Senior Member
    Posts: 282

    Do your customer a favor and line the trench with fabric and use washed rock. The fabric keeps the soil from migrating into and clogging up the rock and the french drain will last a lot longer. Use perforated hard pipe too and provide a cleanout at the uphill end. That corrugated stuff is flimsy junk and I won't touch it. Don't even ask me how many poorly done french drains I've redone in the last 30 years...its been a bunch. I get $20-$25 a foot up to 18" deep.
     

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