Question on drainage correction

Discussion in 'Landscape Architecture and Design' started by CK82, Mar 30, 2009.

  1. CK82

    CK82 LawnSite Member
    Messages: 236

    I have a customer who has some leakage (8ft.) around his foundation. The house is built on a hill with quite a few houses up the hill from it. All of the rainfall and drainage from those houses end up going downhill towards my customers house. Along with grading to make some sort of a small berm (spelling?) I was thinking of securing and chaulking a section of pond liner around the chimney as well. Has anyone ever used pond liner or similar to help keep rainfall from soaking in, or around a foundation? Any insight would be great.

    I know its difficult to picture, Im just asking in general for drainage/leak correction.

  2. CALandscapes

    CALandscapes LawnSite Senior Member
    Messages: 946

  3. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    Will this cause the water to go away more readily rather than soak in? Or is it just to keep it from leaking in until it gets deeper? Water will not be stopped only rerouted.
  4. CK82

    CK82 LawnSite Member
    Messages: 236

    I am going to re route things as best as possible. The liner is supposed to not let any rainfall directly soak in around this area but rather drain further away from the area that leaks (base of a chimney).
  5. CK82

    CK82 LawnSite Member
    Messages: 236

    Thanks for the link to the polyethelyne.
  6. betmr

    betmr LawnSite Bronze Member
    Messages: 1,663

    Consider a French drain, a little ways uphill from your customer's house? Take that water and route it around and below his place.

    I don't know if trying to put flashing on the chimney or divert the water away from the house. If your trying to divert the water away from the house, a French drain is the right thing to do. If it's a basement or crawl space it will be much drier. If you put something like flashing on the chimney, the water is going to just soak down under it. The idea is to get it away.
  7. PSUturf

    PSUturf LawnSite Senior Member
    Messages: 663

    The French drain might not work if the ground is frozen and you get a sudden snow melt or heavy rain. Whenever possible, try to solve water problems by correcting surface flow.
  8. CK82

    CK82 LawnSite Member
    Messages: 236

    The slope of the house as well as the houses built around it is somewhat steep. The customer has an unfinished basement and I dont think the water problem is very bad at this point. I think installing a "true" French drain (no soil and seed over the top will work well. I am going to grade the flower bed away from the house and make a sort of a trough to flow into the French drain.
  9. betmr

    betmr LawnSite Bronze Member
    Messages: 1,663

    Use the PVC pipe with 2 rows of holes faceing down, line your ditch with filter fabric and back fill with gravel to surface. Water has to go in ditch, into pipe and where ever you send it. I don't care for the perforated pipe, as the holes get clogged over time, The PVC w/the holes faceing down, the solids go down & hydrolic presure moves the water up into the pipe and away. Same like a curtain drain at foundation footings.
  10. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776

    I did this job last fall.

    Since completion we've had large amounts of rain of several days this last winter. So it's been tested and works.

    The owners were originally having water in their basement, and now it's dry.

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