ergodesk
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| 09/04/2009 6:26 PM |
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| Lesson #1 - Why you won't find Polyurethane ICFs on the job site.
Answer -
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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ergodesk
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Posts:175
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| 09/05/2009 2:05 PM |
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| 1. The foaming process creates a "skin" that prevents Concrete from bonding to the foam. |
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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arkie6
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Posts:153
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| 09/05/2009 4:19 PM |
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| Why does the structural concrete need to bond to the foam in an ICF assembled wall? |
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Torben
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Posts:21
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| 09/05/2009 7:35 PM |
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| Then why do EPS foam SIPs use polyurethane adhesive to bond to the skins? |
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ergodesk
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| 09/05/2009 7:53 PM |
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| Hey My WHY? was first. |
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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Torben
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| 09/05/2009 8:01 PM |
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| Okay your why first... Because EPS is cheaper than polyurethane. |
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ergodesk
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Posts:175
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| 09/05/2009 8:04 PM |
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| Yes I agree, also EPS is better at insulating, so Cheaper and Better. |
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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richm
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| 09/05/2009 8:39 PM |
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ergodesk,
can you give facts as to "EPS is better at insulating". I am trying to figure all this stuff out and a factual answer with a source would really help!
Thanks
richm |
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ergodesk
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| 09/05/2009 8:47 PM |
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| Sure, http://www.epsmolders.org/ |
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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ergodesk
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Posts:175
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| 09/05/2009 8:54 PM |
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| Environmentalists complain that EPS will not break down in land fills, but you never hear that about Polyurethane foam. Why? |
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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richm
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| 09/05/2009 9:41 PM |
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ergodesk,
Just read the info at EPS Molders Assoc. I could not find where it said that EPS is better at insulating. They sure did write alot about the "aged" (or longer - 10 to 15 yrs) R values of polyurethane and iso. Tests have shown it to go down to 5.6/" whereas EPS lost no R value. That is very good to know.
It was also interesting to see their calculations for equal R values per x inches of material at prices that I have no idea as to the accuracy of.
Does anyone know the current price of 1 lb. density EPS, 1.2 lb EPS and polyurethane (NOT iso!!!) per board foot?
I would like to see some data collected since those tests were done in 1992. Do you know of anything in the works? There must be something - that was 17 years ago!
Also, please tell me if this should be a new thread:
Does anyone have experience with the relatively new EPS from BASF - Neopor. I have researched all I can find and it looks to be the next generation of EPS. Higher K factors, perhaps stronger, no info as to price. Is there a manufacturing plant in the US? All info I have found refers to it being from Germany.
Thanks for all the info all you contributors give!
richm |
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ergodesk
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Posts:175
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| 09/05/2009 10:17 PM |
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I would suggest that you contact many of the builders using the NEW BASF EPS Foams.
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Build Smarter with Structural Insulated Air
http://StyroHomeNews.blogspot.com |
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cmkavala
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Posts:1415
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| 09/06/2009 11:38 AM |
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Posted By arkie6 on 09/05/2009 4:19 PM
Why does the structural concrete need to bond to the foam in an ICF assembled wall?
Arkie6;
you hit it on the head, it does not need to bond at all as it is not part of the structural component.
It is a thermal element of the wall |
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Chris Kavala
chris@southernsips dot com
1-877-321-SIPS |
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