"EPS is the dominant sub-slab insulation material in Europe". What is/are the source(s) for this statement? Dana Dorsett quote.
I am researching the use of EPS and XPS in sub-slab applications for standard residential housing. Thus far it appears as XPS is winning the battle here in the US but I hear that in Europe, EPS is the dominant product of choice. I would love to get some sources to confirm this and to find out "why" Europe ended up going towards EPS over XPS ... I have my suspicions but in data I trust!
Based on the data and research I have found (mostly from product manuf. and some independent studies), I have drawn the following conclusions:
+ XPS has much slower "uptake" of water based on ASTM C272 testing ... b/c its closed cell structure is uniform and has no "voids" like EPS.
+ EPS has much higher "release" of water based on ASTM C1512 testing ... b/c these "voids" are where the water is held versus in the closed cells. XPS is much slower to "release" b/c the water is trapped in the higher ratio of "broken closed cells". Anyone have independent sources here?
+ Due to this fact, both products are compromised regarding the R-value performance. However, over the long term, it would seem, XPS would likely continually (albeit slowly) degrade in R-value performance as compared to EPS. Unfortunately I can't seem to find any conclusive proof of this?
+ Per "lab testing" both products have "data" which the other can use against the other. However, long term, unbiased in-situ testing has yet to be done satisfactorily.
I believe it was Dana Dorsett who stated that "EPS is the dominant sub-slab insulation in Europe" but can he cite a source for this statement as well as some of the above statements?
Posted Wed, 04/02/2014 - 12:41
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