Water-blown closed cell SPF
rwpinto
| Posted in Energy Efficiency and Durability on
Is water-blown (or non-HFC blown) closed cell spray polyurethane foam (SPF) available?
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Replies
Yes.
Icynene's MD-R200 is a 2 lb foam, R5.1/inch, 1.3perms @ 3".
http://www.icynene.com/builders/products/product-portfolio/md-r-200-spray-foam-insulation
The higher permeance is due to a higher open-cell fraction, so they've recently been re-classifying it as open cell, but it's often a better choice for moisture control than low-permenace 2lb spray polyurethane (typically 1.2 perms @ 1"). It's still an order of magnitude lower permeance than half-pound polyurethane.
Aloha Energy has a whole suite of low-permeance closed cell polyurethane at different densities, all water blown.
http://www.aloha-energy.com/index.php