Results 1 to 10 of 10
  1. #1
    Jonathan Cartwright's Avatar
    Jonathan Cartwright Guest

    Question DG over moisture barrier

    Inspected the crawlspace of a 2007 built home. There is a sump and drain in the center of the crawlspace - drain is supposed to terminate at a drainage ditch adjacent to this neighborhood. Most of the homes in this small neighborhood have these drains however a few do not.

    My question is why is the entire crawlspace covered with 2 to 4 inches of decomposed granite (DG) on top of the moisture barrier? Does this have anything to do with the drain system? The few homes without the drains have no DG in the crawlspace.

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    Inspection Referral SOC

  2. #2
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    4,795

    Default Re: DG over moisture barrier

    Yes it appears so. The holes in the plastic liner have holes in them within inches of the top.

    The value of experience is not in seeing much, but in seeing wisely.

  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,308

    Default Re: DG over moisture barrier

    Quote Originally Posted by Jonathan Cartwright View Post
    decomposed granite (DG)

    I know I could do a Google search and probably find out, but ...

    ... I'll be the dumb one and ask:

    What to heck if "decomposed granite"? I didn't know granite "decomposed"????

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,286

    Default Re: DG over moisture barrier

    Jerry,

    Hard to believe, but granite does crumble and eventually fall apart into particles resembling crushed sand. Presumably a part of the erosion/weather process. Here in CA, we have Joshua Tree National Monument and Yosemite, at both of which the ground is covered with DG in many areas.

    Around here, DG is used a lot for garden walkways. It is spread it out, watered and compacted with a tamper or weighted roller. Makes an attractive and durable walkway that you can roll a wheelbarrow on.

    I guess I sound like an ad for the DG marketing counsel.

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  5. #5
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,308

    Default Re: DG over moisture barrier

    Quote Originally Posted by Gunnar Alquist View Post
    Jerry,

    Hard to believe, but granite does crumble and eventually fall apart into particles resembling crushed sand.
    No, that is not hard to believe, I've seen it, but ... the granite is not "decomposed" is it? Isn't it then just 'crushed granite'?

    It is the "decomposed" part which I'm not getting. Wood "decomposes", but does "rock"?

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  6. #6
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,286

    Default Re: DG over moisture barrier

    JP,

    I guess it is just what it is called, rather than what it is. Like ironwood is not really iron or Grape Nuts are not made from grapes or nuts.

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  7. #7
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,517

    Default Re: DG over moisture barrier

    I don't even want to know then where butter comes from.


  8. #8
    Jonathan Cartwright's Avatar
    Jonathan Cartwright Guest

    Cool Re: DG over moisture barrier

    Now that we have thoroughly explored the regional lingo of DG and gravel based breakfast cereal does anyone have any ideas as to why the whole crawlspace would be covered with the stuff???

    I have seen gravel placed around sumps in the crawls to prevent excessive soil from washing in and clogging the pump however I have never seen this type of application throughout the crawlspace.


  9. #9
    David Banks's Avatar
    David Banks Guest

    Default Re: DG over moisture barrier

    Probably as a ballast for the moisture barrier. It also works as a nice drainage material.


  10. #10
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    4,795

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
  •