PermaLoft is perhaps the only loose fill, blown-in wool insulation on the market.
Made specifically for re-insulation applications, GreenFiber offers R-values ranging from 13 to 60.
Kuklinski and Rappe Architects: Nu-Wool claims WALLSEAL—an engineered spray-in cellulose insulation made of recycled newsprint—completely fills cavities to eliminate air infiltration.
Roxul ComfortBatt, a stone wool exterior wall insulation made from basalt rock and recycled slag, is now available in the U.S. market.
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