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Old 01-17-2011, 10:25 PM   #1
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Insulating


Insulation seem to be quite the topic these days, I have a Basement, and where I can crawl under my Kitchen. I am wanting to Insulate my floor, and was woundering If I should use the rolls or maybe the Styfoam Board type 1" thick.


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Old 01-18-2011, 05:58 PM   #2
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Insulating


I've been in Indiana in the winter and you need a minimum of 3" of styrofoam. 4" would even be better.

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Old 01-20-2011, 01:02 AM   #3
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Insulating


so you've got a crawl space, and are wondering if and how you should insulate the floor above it? you probably shouldn't. read on buildingscience.com or search here; lots of posts on crawl spaces. typically, you should insulate the walls and bring the crawl into the conditioned space. j
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Old 01-20-2011, 08:51 AM   #4
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Insulating


Quote:
Originally Posted by jklingel View Post
so you've got a crawl space, and are wondering if and how you should insulate the floor above it? you probably shouldn't. read on buildingscience.com or search here; lots of posts on crawl spaces. typically, you should insulate the walls and bring the crawl into the conditioned space. j
Right - I think the point being that you don't want to insulate your crawlspace to the point that it is below freezing.

I can't say for sure, but I think the ideal would be to insulate the outside walls of the crawlspace well enough that it stays well above freezing, then also insulate between the floor joists. A cold floor makes the whole house cold.
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Old 01-20-2011, 02:58 PM   #5
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Insulating


Check on buildingscience.com and greenbuildingadvisor.com, etc. i don't have a crawl, so don't study them. However, I think the "typical" plan is to keep the temp down there warm, not just above freezing. The insulation in the house floor can be problematic; gets damp. Insulate the earth floor and install a vapor BARRIER, running that up the walls several inches, Tremco sealing, and insulate the crawl walls; that is the scenario I recall reading about regularly.
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Old 01-20-2011, 08:01 PM   #6
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Insulating


Part of your State is a high risk Radon zone, check with your local building department before conditioning the crawlspace; http://energy.cr.usgs.gov/radon/rnus.html
http://www.diychatroom.com/f98/how-b...ulation-90438/
http://www.buildingscience.com/docum...n-crawlspaces/

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Old 01-20-2011, 09:39 PM   #7
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Good pt, Gary. If I had radon, I'd install the radon pipes and vent them outside, the proceed as per a house, myself. Easy to do, but maybe not so easy in a crawl, depending on height. Fact, I'd do that even if there was a slim chance of radon; may as well not poison yourself while at it.
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Old 01-23-2011, 09:33 PM   #8
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Thanks for all the imput, I talked to my Building Inspector and He's About clueless? I think he's the Mayor's Cousin? So I waiting to here back from The County Building Guy. Some Great Reads.
http://energy.cr.usgs.gov/radon/rnus.html
http://www.diychatroom.com/f98/how-b...ulation-90438/
http://www.buildingscience.com/docum...n-crawlspaces/

buildingscience.com

greenbuildingadvisor.com

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