Plastic Support Insulation on open Ceiling

Discussion in 'Remodel Forum & Blog' started by Lakee911, Sep 25, 2009.

  1. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Messages:
    1,328
    Location:
    Columbus, OH
    If I stapled some plastic to my ceiling rafters (24in o.c.) would that be enough to support R-30 insulation if layed between them? Drywall won't be installed for some time. What is the minimum thickness platic recommended?

    Thanks
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,230
    Location:
    Cave Creek, Arizona
    insulation

    Why aren't you using paper backed insulation stapled to the joists? If you use the proper unfaced insulation it is wide enough so that it has to be pushed into the spaces which usually holds it up, so your plastic would just have to keep it there, not support it.
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