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  1. #1
    Daniel Leung's Avatar
    Daniel Leung Guest

    Default What kind of insulation in attic

    These photos are taken from the attic of an 90-year old house. The attic insulation looks like cotton, and some fibers look like fiberglass. Is it Rockwool?

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  2. #2
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
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    5,847

    Default Re: What kind of insulation in attic

    Looks like old dirty blown-in fiberglass insulation. Any K&T under it by chance??

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  3. #3
    Daniel Leung's Avatar
    Daniel Leung Guest

    Default Re: What kind of insulation in attic

    Quote Originally Posted by Scott Patterson View Post
    Any K&T under it by chance??
    SP, Thank you. Yes there are knob & tube wiring under it (see photos).

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  4. #4
    Join Date
    Mar 2007
    Location
    Greenville, N.C.
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    254

    Default Re: What kind of insulation in attic

    For what it's worth, it looks mighty like rockwool to me. Not that there's a great difference.

    JLMathis


  5. #5
    AL Mullis's Avatar
    AL Mullis Guest

    Default Re: What kind of insulation in attic

    Is this blown insulation considered a certain type of R Rating due to its color? There is a measuring tape in the background for the installers but the insulation is not evenly distributed. Can this be considered an R30 or R38 type insulation?

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  6. #6
    Join Date
    Mar 2007
    Location
    Plano, Texas
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    Default Re: What kind of insulation in attic

    Quote Originally Posted by AL Mullis View Post
    Is this blown insulation considered a certain type of R Rating due to its color? There is a measuring tape in the background for the installers but the insulation is not evenly distributed. Can this be considered an R30 or R38 type insulation?
    No
    Unknown

    The depth of insulation and type yields the r-value.
    The color has nothing to do with r-value, only identification by brand.

    There should be an insulation fact sheet attached to the house at the attic opening which should list the brand, depth, r-value, etc.

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  7. #7
    Join Date
    May 2008
    Location
    Atlanta
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    120

    Default Re: What kind of insulation in attic

    Damn, that's not rat crap all over the place is it?


  8. #8
    Daniel Leung's Avatar
    Daniel Leung Guest

    Default Re: What kind of insulation in attic

    Quote Originally Posted by Brent Crouse View Post
    Damn, that's not rat crap all over the place is it?
    Good eyes, Brent. I think there are the rodent tracks on it.


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