Will insulating the crawl space help reduce cooling costs?

chillcatjenJanuary 24, 2013

I'm thinking about insulating my crawl space but not sure it will be worth it.

I have a 100 year old, 2000 sq. ft house in new orleans that is about 4 feet off the ground. The floor is in excellent condition, but it's the hardwood and that's it. No subfloor, so winter is chilly. I got an estimate of $3300 for closed cell foam. But, considering that our winters are pretty short and mild, I want the investment to help with cooling costs as well. I have uninsulated walls and cellulose in the attic.

If anyone has an experience adding crawl space insulation, I'd love to hear what impact it has on your cooling costs. Everything I hear/see/read points to saving on heating costs, not cooling.

Many thanks in advance for your thoughts.

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tim45z10

Try contacting your local gas and elec co. I believe they will have all the answers you need

    Bookmark   January 25, 2013 at 1:01AM
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energy_rater_la

yeah...Entergy is going to help you out! LOL!
they do actually have a program in N.O. through
Entergy using local energy raters.
a little biased, but it is what it is.

below is a copy & paste link to LSU AgCenter's study
about insulating floors in homes with open crawlspaces.

http://www.lsuagcenter.com/NR/rdonlyres/D33F711D-DC4B-4E4C-9ED6-A97DCE9DB026/79806/pub3187insulatingraisedfloorsHIGHRES.pdf

I plan to insulate my floors with closed cell
3" everywhere...not average fill.
once floor in bathroom is replaced and
plumbing is finished.
your biggest battle is going to be getting
3" everywhere, and not just averaged fill.
plan to crawl under house before they
leave. take a piece of wire with inches marked
on it and a can of spray paint.
have them come back and touch up low spots.

knowing the foam companies you'll have to
deal with, plan on double checking the work
and not relying on their word that it is right.

understand that closed cell is about R-7 per inch
so 3" is R-21. actual R-values not quanitive values
are what is important.

best of luck.

    Bookmark   January 25, 2013 at 6:15PM
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chillcatjen

This was very helpful. Thanks!! The report mentions the termite issue . . . I hadn't even thought about the termite contract - I need to get with them before I do this.

    Bookmark   January 27, 2013 at 8:12PM
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