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smartin Registered Users
Posts:10

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| 06/24/2008 6:21 PM |
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| I am going to build and am currently trying to decide whether to build with ICF's or a combination of ICF's and SIP's. I am building a single story ranch with a full walkout basement. What are the advantages of doing an ICF basement as opposed to doing a traditional poured wall basement? A poured basement that is insulated on both the inside and outside plus underslab foam would seem to have many of the same properties as the ICF basement. In addition given current material prices would there be any advantage between Sip/ICF upstairs? |
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TLC-ICF Registered Users
Posts:15

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| 06/24/2008 8:47 PM |
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| eather or would be good for upstairs. The ICF would be much stronger. AS for the basement I think the Icf is far better than trying to insulate a poured wall. |
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smartin Registered Users
Posts:10

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| 06/24/2008 9:28 PM |
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| One builder I know is trying to talk me out of the icf basement because he says that a double insulated poured wall will have the same insulating properties. It seems to me that an icf is a simpler option. I'm not sure of the cost difference. |
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The Panel Guy Registered Users
Posts:57

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| 06/24/2008 10:52 PM |
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Walk out basements built with ICFs and SIPs above is a pretty standard build in my neck of the woods. ICFs are cheaper than a poured wall, if you have to purchase your forms for the poured wall and once you figure the amount of labor to strip and get rid of (or stack and store) the form material. Then to get an insulated wall you have to frame at least a 2 x 4 wall on the inside of the poured wall then stuff insulation into it, or you can spend the labor to install foam directly to the wall (foam has an R-factor of basically 4 per inch). To get the minimum of an R-19 wall you would need to apply at least 5 inches of foam. After all that the ICF is way cheaper and you get an R-24 of better wall that you simply attach finishes to.
No matter what part of the country you live in, ICFs (ICF materials, concrete, steel and fasteners, and labor) runs approximately 10 to $ 15.00 per square foot. SIPs cost 7 to $ 9.00 per square foot (SIP materials, fabrication and installation labor).
I feel that SIPs are a lot easier to work with in a 2nd story application. I wouldn't use anything else for a walkout basement and on occasion I have a client that wants all of the exterior walls built with ICFs and then uses SIPs for the roof. |
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lkazanov2 Registered Users
Posts:104

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| 06/25/2008 2:47 PM |
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The most important factor to keep in mind in the proposed difference is when the forms are stripped. With poured wall systems forms are stripped rather quickly. With ICF, the concrete is allowed to continously cure in a protected, insulated environment. End result? Your mix becomes much stronger than a typical poured wall. How important is this? Personal decision. But fundamentally that is the major difference aside from the ease of construction (insulation, furring all in one install).
Leonard
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