ShockWave Drainage and Insulation Board
Pat_Kiernan
| Posted in Energy Efficiency and Durability on
Does anyone have experience/opinions on ShockWave Drainage and Insulation Board for use as exterior basement insulation?
http://www.mar-flex.com/products/residential-solutions/drainage-boards/shockwave-drainage-board/
One house in our area is using it. It seems fairly easy to compress.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
Pat,
I'm not familiar with the product. The R-value information provided in two published documents -- a brochure and spec sheet -- are irritatingly misleading when it comes to listing the product's R-value.
The listed R-value is for "3 layers: earth, foam, concrete." That's absurd. No one should report product R-values this way -- and in fact I suspect that their literature is in technical violation of the Federal R-value Rule.
If you compare the R-values listed for the 1 inch thick product and the 2 inch thick product, you can deduce that the foam may have an R-value of R-4.5 per inch. But because they play games with their R-value reporting, the manufacturer has lost all credibility as far as I'm concerned.
Martin,
Thanks for taking a closer look. I thought the way they presented R-Value was misleading as well. They claim to have LEED certification, but I don't really know what that's worth.