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  1. #1
    Join Date
    Oct 2011
    Location
    Minneapolis, MN
    Posts
    780

    Default Type of sheathing?

    This is a photo under an eave. 1955 house, flat roof. I'm not sure if this is actual roof decking or not. From interior photos of the house I found on the internet, it appears that the same stuff is used uncovered as ceiling inside the house. I'm not familiar with it. Tried to find it on the 'net, to no avail. What is it?

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    Do not think of knocking out another person's brains because he differs in opinion from you. It would be as rational to knock yourself on the head because you differ from yourself ten years ago.
    - James Burgh, 1754.

  2. #2
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Type of sheathing?

    Kristi,


    I forgot to include this with that photo I sent you : Tectum is what that is called.

    Long span planks, roof deck tile and concealed tee acoustical decks

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  3. #3
    Join Date
    Feb 2008
    Location
    Chicago IL
    Posts
    2,048

    Default Re: Type of sheathing?

    Looks like standard wood particle strand board. Was used a lot more. Don't see it used as much more these days around here at least. I think OSB overtook it as a cheaper plywood alternative. Does not like water. Typically non-compliant for interior exposed use due to lack of fire rating. Could be fire protected but no way to tell from the pic.
    Just my guess.

    www.aic-chicago.com
    773/844-4AIC
    "The Code is not a ceiling to reach but a floor to work up from"

  4. #4
    Join Date
    Oct 2011
    Location
    Minneapolis, MN
    Posts
    780

    Default Re: Type of sheathing?

    Ah, Tectum, that's it! Aspen wood fibers bonded with a cement binder. Interesting! I figured that wouldn't take long.

    Thanks for the pic, Jerry

    Do not think of knocking out another person's brains because he differs in opinion from you. It would be as rational to knock yourself on the head because you differ from yourself ten years ago.
    - James Burgh, 1754.

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