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Another Home insulation question (crawl space)

bama55
Our home was built about 26 years ago. Walls and attic are insulated, between the floor joists is not. All we have is the plywood subflooring and carpet. We did have vents installed that close when below 60'(I think), and they seem to help. Question is, would it be worth the savings to insulate between the floor joists? I have asked around and most say that new builds, with a crawl space, are insulated.
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Comments

9 comments

Date Votes
  • 788-308
    IMO, if you are going to be in the house for several years, it would be worthwhile.
    Check at the home centers for data. IIRC, there is a calculator available online that you can plug in your location and energy costs and it will tell you the time to recoup your cost.
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  • daveald
    ABSOLUTLY !!!
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  • allen griggs
    Yes it is code to insulate the floors today, and has been for at least 11 years.
    I believe that R19 is the minimum.
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  • bama55
    Thanks guys. I might make this a spring project, as I have a bunch of stuff going on right now.
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  • Permanently deleted user
    There is no doubt that it is absolutely worth it.
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  • asop
    Make sure a "vapor barrier" is installed. Either as insulation backing or visqueen type material. Good luck.
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  • bama55
    Vapor barrier is already on the ground.
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  • allen griggs
    You also need a vapor barrier between the insulation and the house.
    The simplest thing, which I did, is buy the fiberglass insulation that is backed with paper.
    Install the paper side next to the floor.
    They also make insulation that is completely wrapped in plastic, it works fine, too, but is more expensive.
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  • calamitywood
    If you remember my reply to your earlier post I was very much in favor of lose fill insulation. In this case I would opt for the fiberglass bat like one of the earlier posters mentioned. They make a spray on insulation that mixes a glue with loose fill and it sticks to the whatever it is sprayed on. I don't really care for this for floor insulation. If the rest of the home is properly insulated you really don't need that much on the floor. The idea is to slow down the loss of heat escaping from your ceiling and walls because heat rises (obviously)I would be more concerned about open areas in your crawl space that would allow cold air to come into your home.
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