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  1. #1
    Join Date
    Jan 2004
    A friend's 1960's era home's crawlspace has rigid steel air ducts. They are insulated with what looks like fiberglass with a layer of cardboard on top. The insulation is coming off in a few places. In some other places the cardboard (if that is what it is) is deteriorated somewhat.

    There are no air leaks according to the local duct contractor. He says it would be too difficult to replace the damaged or deteriorated insulation. His suggestion is to fix the damaged areas on the main ridgid trunk line and replace the supplies with flex duct.

    It looks to me that the worst of the damaged supply areas could be fixed. Also, the fact that there are no leaks in the existing system would lead me to keep what is there.

    What would you suggest in this situation?


  2. #2
    Join Date
    Mar 2005
    burlington county n.j.
    find someone who will reinsulate. flex duct is the last thing you want in a crawl space. critters like to chew.

  3. #3
    Join Date
    Jan 2004
    Burleson, Texas
    I would have the sheetmetal ductwork re-insulated if all possible, I went on a service call this week, the problem was that the flexduct had a hole in it and the neighbor's cat had got in it and had kittens (not counting the odor with the animal by-products in it) .. So I had to get the critters out and do a temporary repair.. I will be replacing it with sheetmetal ductwork....

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