(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 8 of 8

Thread: cement patio

  1. #1
    DIY Junior Member janetcal's Avatar
    Join Date
    Aug 2010
    Location
    Pennsylvania
    Posts
    12

    Question cement patio

    Has anyone ever seen or heard of pouring a cement patio on top of dirt instead of on rock? We live in Western Pennsylvania.

  2. #2
    Irrigation Contractor Fireguy97's Avatar
    Join Date
    Mar 2010
    Location
    Kamloops, in Beautiful British Columbia
    Posts
    100

    Default

    I've heard of it, I've seen it done, but I'm an Irrigation Contractor not a Landscaper, or a concrete guy. Do you mean gravel, or rock? I know that if you did pour over soil, it would still have to be compacted, and very stable to start with.

    Mick

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,195
    Blog Entries
    1

    Default

    Most of the concrete driveways and patio's in Seattle are poured over dirt.

    http://www.easydigging.com/Drainage/...nch_drain.html
    Last edited by Terry; 09-02-2010 at 05:11 PM.

  4. #4
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,142

    Default

    If you live in an area in which the ground freezes and thaws in the winter it would be a big mistake.
    The high moisture content often found in soil causes it to expand greatly when it freezes & then the slab will heave and crack.

    Rock or gravel is used as a proper base because it allows water to quickly drain and moisture to dry outward.

  5. #5
    DIY Senior Member dlarrivee's Avatar
    Join Date
    Jun 2009
    Location
    Canada
    Posts
    1,172

    Default

    Use concrete not cement, and use rebar, and ensure the subgrade is well compacted.

  6. #6
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,624

    Default

    Unless the dirt has been disturbed, it is probably as compacted as it is going to get. Many people use the terms cement and concrete interchangeably, even though one is a subset of the other.

  7. #7
    DIY Senior Member dlarrivee's Avatar
    Join Date
    Jun 2009
    Location
    Canada
    Posts
    1,172

    Default

    Quote Originally Posted by hj View Post
    Unless the dirt has been disturbed, it is probably as compacted as it is going to get. Many people use the terms cement and concrete interchangeably, even though one is a subset of the other.
    I'm just clarifying because I've seen people mix straight portland cement with water and expect it to work like concrete.

    Cement is an INGREDIENT in a concrete mix.

  8. #8
    DIY Junior Member janetcal's Avatar
    Join Date
    Aug 2010
    Location
    Pennsylvania
    Posts
    12

    Default

    yes we used 2 inches of rock over the dirt and will pour 4 inches of cement.... I wanted 4 inches of rock and 5 1/2 inches of cement but contractor says we dont need that much because it is a patio and not a driveway.. Im just concerned about the winters here in western Pa.. I know the first year is crucial so that the cement dont crack.. someone told me to also get some hay or straw and leave it on the corners of the patio after the cement has dried to cure the patio.. anyone hear of that? thanks for the feedback

Similar Threads

  1. Patio Sink
    By Esquire in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 06-21-2010, 05:47 PM
  2. Patio Cover Rebuild
    By Jeff1 in forum Remodel Forum & Blog
    Replies: 15
    Last Post: 10-31-2009, 08:00 AM
  3. Install conduit under existing patio
    By Old Coot in forum Irrigation / Sprinkler Forum
    Replies: 2
    Last Post: 06-05-2009, 06:32 AM
  4. Gas line under patio - How to cap?
    By dback64 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 07-13-2006, 06:14 AM
  5. Propane line under patio slab?
    By hughman in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 3
    Last Post: 09-04-2005, 06:18 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •