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  1. #1
    Join Date
    Mar 2007
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    Chicago, IL
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    Default "Drywall" material identification

    Can anyone identify this material?

    New construction. Rear of panel, seen from attic. Material has a "mesh" backing, and the finish on the back has a smooth, "waxy" feel.

    1) What is it?

    2) How effective is it as a vapor retarder?

    - Thanks

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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
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    Default Re: "Drywall" material identification

    Quote Originally Posted by Michael Thomas View Post
    Can anyone identify this material?

    New construction. Rear of panel, seen from attic. Material has a "mesh" backing, and the finish on the back has a smooth, "waxy" feel.

    1) What is it?

    2) How effective is it as a vapor retarder?

    - Thanks
    I think the mesh is separate from the drywall, and is used to hold the blown insulation before the drywall is installed.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Mar 2007
    Location
    Columbus GA
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    Default Re: "Drywall" material identification

    Insulation netting
    Mesh Netting
    Tenax 4 ft. x 330 ft. Black Insulation Netting-411093 at The Home Depot

    The "waxy feel" on the back of the drywall sounds like it may be green board.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  4. #4
    Join Date
    Mar 2007
    Location
    Chicago, IL
    Posts
    2,797

    Default Re: "Drywall" material identification

    Quote Originally Posted by Rick Cantrell View Post
    Insulation netting
    Mesh Netting
    Tenax 4 ft. x 330 ft. Black Insulation Netting-411093 at The Home Depot

    The "waxy feel" on the back of the drywall sounds like it may be green board.
    Tenax insulation mat is black.

    This "net' material is clear, and is embedded in the "waxy" material on the back side of the panelized product.

    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

  5. #5
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
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    Default Re: "Drywall" material identification

    The netting does come in clear also.

    Looking at the photo, the netting does not look to be embedded.

    Anyhow, just my thoughts, I could be wrong.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  6. #6
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: "Drywall" material identification

    That joist doesn't look too 'new'.Is this over a shower with a tiled ceiling? Looks like a form of tile backer board other than durarock, fiber not cementous. IIRC was being talked about quite a bit last mid-decade on john bridge tile forums...not too favorably..but can't recall the trade names nor the generic name at the moment, IIRC had embossed or grooved 1/2" square grid. Concerned about prescribed protections for roof sub assembly. Anything less than =/+ 1/2" gyp X taped & mudded or equal regarding fire resistance for the ceiling to protect the roof assembly tested would likely be an issue with insurer and local muni for densely populated and close quarters NE Ill greater chi area. Still need that escape prior to collapse time.

    On the VP, Red Guard or Lacrete (sp? - the green stuff) is a VB as is primer plus ordinary paint job. The OSB adjacent also ceiling area/chase/sofit? appears more of issue, yes?

    Last edited by H.G. Watson, Sr.; 08-05-2013 at 11:31 PM.

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