Radon abatement plan

Discussion in 'General Home Improvement Discussion' started by ironhat, Mar 22, 2008.

  1. Mar 22, 2008 #1

    ironhat

    ironhat

    ironhat

    Active Member

    Joined:
    Mar 8, 2006
    Messages:
    25
    Likes Received:
    2
    It's time to vent the crawl space and have done the appropriate info gathering from the governmental sites and have a couple of questions that I don't find addressed in those sites (which I can't believe since they seem like pretty basic requirements for this).

    I am to lay what essentially amounts to 'crusher run' rock on the floor first (I have seen several numbers listed so there must be a veeeery loose standard for aggregate sizing).

    1) Is three inches about right?
    2) Can I place the perf'ed pipe right on top and then drape with 6 mil poly or would a shallow trench be appropriate (suggested by my mason).
    3) The site says that I can use a spray adhesive or 'tape' on the poy joints.
    I don't have much confidence in a gapless joint joint using the sprays. So, that said, what would be a good tape? Silver ducting tape and clear, non-stranded packing tape has been suggested. Opinions welcome.

    That's about it! TIA, folks.
     
  2. Mar 23, 2008 #2

    radonguy

    radonguy

    radonguy

    Member

    Joined:
    Jul 14, 2007
    Messages:
    10
    Likes Received:
    0
    Hi,
    If you are covering a crawlspace for radon gas reduction you can skip the gravel and maybe the perforated pipe depending on the size of the space. We fasten 10mil cross weave poly to the foundation walls with power load nails through a strip of 1" wide 1/2" treated plywood. We then drape the excess poly over the plywood and use a urethane caulk to seal the top edge. For joining seams we over lap 6" and use urethane between the lap and duct tape the joint to hold everything in place until all is dry. If you are going to apply suction to the area a PVC tee is inserted through a cut in the plastic and attached to the vent pipe.

    Hope this what you needed,
    Val
     

Share This Page