concrete slabs

Discussion in 'Landscape Architecture and Design' started by BVLAWNCARE, Sep 21, 2004.

  1. BVLAWNCARE

    BVLAWNCARE LawnSite Member
    Posts: 88

    Hey guys,

    I have yet another question...
    I was wondering for a hard bed patio or walkway, how thickshould the conrete slab underneath the paver be?

    What if your doing a conrete driveway, how thick should the slab be if its a pure concrete drive or sidewalk?

    Thanks in advance for the replys
     
  2. midtnstone

    midtnstone LawnSite Member
    from mid tn
    Posts: 76

    as for concrete drive and walkways most people around here go 4" i would go any less than that but that is just me
     
  3. GreenMonster

    GreenMonster LawnSite Silver Member
    from NH
    Posts: 2,702

    Why would you want to pour concrete under a paver patio/walkway?

    Aren't you subject to frost in Ill? If so, concrete base is going to crack. Gravel base will "flex" with the freeze/thaw cycle.

    Need more info.....
     
  4. D Felix

    D Felix LawnSite Bronze Member
    Posts: 1,898

    For a straight concrete drive, I wouldn't go any less than 6". Sidewalks are OK at 4".

    Don't put pavers over concrete, like Mark said, it will crack eventually. I've seen it done, but I'm sure there's going to be future problems.


    Dan
     
  5. BVLAWNCARE

    BVLAWNCARE LawnSite Member
    Posts: 88

    Hey guys
    Thanks for the replies. I do have another question related to this though... I thought that you could put concrete base under bricks and pavers even in cold climates. Aren't 'hard bed' driveway and walk recommended for quality and durability?
     
  6. GreenMonster

    GreenMonster LawnSite Silver Member
    from NH
    Posts: 2,702

    I'm not familiar with the term "hard bed", but a properly installed walk on a crushed gravel base is going to last for years -- longer than a walk installed on a concrete slab that is going to heave every winter.
     
  7. BVLAWNCARE

    BVLAWNCARE LawnSite Member
    Posts: 88

    Thanks for the tips. Yeah the book im reading about it refers to it as a 'hard bed'. One more question though, doesn't a soft-set walkway and drive get like weeds that grow in the joints? I have seen that before; does that just mean that it wasnt installed right?
     
  8. GreenMonster

    GreenMonster LawnSite Silver Member
    from NH
    Posts: 2,702

    Possibly installed improperly -- if insufficient base material is used, and no geo textile UNDER the base, weeds could make their way through. More often than not, the weeds you see are from wind-blown germination. There isn't much you can do about it, although polymeric sand will help, and hit it with round-up from time to time.
     

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