+ Reply to Thread
Results 1 to 5 of 5

Thread: Insulation

  1. #1

    Post Insulation

    Can you install insulation behind GP DensGuard tile backer board in the bathroom? On their web site it only says not to use a vapor barrier and nothing about insulation.We are removing the "brick nogging" from in between the studs that Senior Member JLMCDANIEL advised me on.The bricks were the only "insulation" in the walls.If allowed what would be the best insulation for this bathroom? Thanks in advance. Jim

  2. #2

    Default Re: Insulation

    Quote Originally Posted by bigjimsayreville View Post
    Can you install insulation behind GP DensGuard tile backer board in the bathroom? On their web site it only says not to use a vapor barrier and nothing about insulation.We are removing the "brick nogging" from in between the studs that Senior Member JLMCDANIEL advised me on.The bricks were the only "insulation" in the walls.If allowed what would be the best insulation for this bathroom? Thanks in advance. Jim
    I e-mailed GP about this and they said "you can insulate but don't use a vapor barrier".

  3. #3
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Insulation

    Curious .... I haven't been able to find anything that directly states not using a vapor barrier.

    The 2006 IRC states in Section R702.3.8.1 that “Water-resistant gypsum backing board (Greenboard) shall not be used where there will be direct exposure to water.”

    Cement, fiber-cement or glass mat gypsum backers installed in accordance with manufacturers’ recommendations shall be used as backers for wall tile in tub and shower areas and wall panels in shower areas.”

    So ... basically this product is an approved backing material to be used in a wet are such as a shower/bath.

    The problem I see is if your local code requires the exterior wall to have an approved vapor barrier .... it's unclear if this product qualifies as an approved vapor barrier.

    If so then applying this product would require complete and continious coverage from the ceiling to the floor the entire exterior wall in the wet area.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  4. #4
    Join Date
    Nov 2007
    Posts
    980

    Default Re: Insulation

    forget my post here, was out in the sun toooooo long way to hot today
    Last edited by havanagranite; 07-21-2008 at 03:53 PM.

  5. #5
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Insulation

    Ok .... forget about my reply to your reply.
    Last edited by canuk; 07-21-2008 at 03:59 PM.
    "" an ounce of perception -- a pound of obscure "
    - Rush

Posting Permissions

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