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Old 01-11-2010, 09:40 PM   #16
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Concrete over foam board


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Originally Posted by GBR in WA View Post
I read 25 for both on compressive-------- Dow=50 on flex strength, pink= 75, not the freezer but 250. I was comparing these:

http://insulation.owenscorning.com/W...=id&ItemID=788

http://www.dow.com/PublishedLiteratu...romPage=GetDoc

Be safe, Gary

Yes, those are both 25 psi, which is what is rarely found at the big box stores, although some of them sell 2" in both. The link for the Owens is the 250 which means 25 psi. The Foamular 150 is the far more common foam, which is 15 psi.

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Old 01-11-2010, 10:03 PM   #17
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Concrete over foam board


So we are both right! The box stores should carry everything at every store! It's all their fault. lol That's why one foam is pink and the other blue, when one split from the other company, they took the formula with them.

Another good site for the OP, on sand, fines, vapor barriers, and water in the slab: http://www.buildingscience.com/docum...ms?full_view=1

And for the fork-lift driving Contractors: http://www.stellarcontractors.com/as...loose_sand.pdf

Be safe, Gary

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