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  1. #1
    Join Date
    Apr 2014
    Posts
    1

    Default Asbestos shingles

    Can I cover existing exterior asbestos shingles with 2-3 inches of styrofoam insulation and new cedar shingles?
    The asbestos shingles are in good shape with no loose shingles anywhere.
    The house was built in 1951.

  2. #2
    Join Date
    Oct 2012
    Location
    Houston, TX
    Posts
    295

    Default Re: Asbestos shingles

    Why not remove them and take the opportunity to clean up any framing or sheathing issues?
    It's this old house, not this built after your dad was born house.

  3. #3
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,480

    Default Re: Asbestos shingles

    I would do the same thing. Rather than bury the asbestos, have it removed, legally.

    This way you rid your house of these shingles and get a chance to check, correct, replace a lot of things: dry rot lumber, electrical wires, plumbing, etc.

    Where is the house located? can you install cedar shingles?

  4. #4
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,793

    Default Re: Asbestos shingles

    Not sure of the code requirements in Canada, but here some jurisdictions will not allow you to drive nails through asbestos shingles.

    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  5. #5
    Join Date
    Jan 2008
    Posts
    2,044

    Default Re: Asbestos shingles

    Also there may be codes prohibiting a overlay of new roofing. Where I live, every re-shingling requires a tear-off by code now. They just started that about 18 months ago and woe unto the person who gets caught violating this one, especially if they find you've done other roofs similarly since the code change. It doesn't make sense to me but there it is and like all the codes you just have to deal with it. At disposal they also consider all shingles to have a low asbestos content because they can't differentiate among the different types at the landfill. No double-bagging etc, but an extra fee. Unless you try, dislodging airborne asbestos fibers from composite shingles isn't easy to do, so they're pretty safe to work around compared to other asbestos-bearing materials.

    Phil

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