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Raised Patio question

Discussion in 'Hardscaping' started by DupaMan, Oct 10, 2006.

  1. DupaMan

    DupaMan LawnSite Member
    from toronto
    Posts: 4

    New to this site, hope someone can help...I'm in the process of building a raised patio. I need to know what is as good base for the retaining wall, because so many people have told me different things. I'll be excavating about 14-15 inches, to allow for 8-9 inch base plus one block being buried. Some have said to use crushed limestone, others 3/4" crusher run, some say 3/4" clear gravel??? seems like everyone has their own secret method of doing things, and I don't want to experiment with methods..I just want a solid patio. My blocks are 8" wide, 6" high, and 10" deep, with built in set back of 7 degrees Including the buried block , the wall will be 4 rows high, backfilled with ??? and then pavers installed. Can some one steer me in the right direction.

    Thanks in advance,
  2. cedarcroft

    cedarcroft LawnSite Senior Member
    Posts: 442

    a nice compacted RCA base with a thin layer of crushed bluestone for ease of leveling usually works well. there are alot more experienced folks than me on here though. maybe they will give you a better answer.
  3. DupaMan

    DupaMan LawnSite Member
    from toronto
    Posts: 4

    RCA ? what is this? Do you use the same stuff to backfill? Is 1/4" pea gravel good for backfilling?
  4. mrusk

    mrusk LawnSite Gold Member
    Posts: 3,260

    You want to use modified, quarry process, road base or whatever they call it in your region for the base. It is 3/4 stone all the way down to fines. It compacts the best.

    Some people use 3/4 clear stone for the base and swear by it, but i wouldn't use it in most applications.

    Do not use stone dust or sand to help level the blocks. Thats one of the worse things to do. After a couple walls you will learn the tricks to get the base so perfect that you won't have to hit any blocks with a mallet to get them level. Well it takes more than just a few walls to get that good.

  5. Grn Mtn

    Grn Mtn LawnSite Senior Member
    Posts: 863

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