All-Natural Insulation with Expanded Cork Boards

October 16, 2012 · Print This Article

Cork is a very versatile material with a great green pedigree. It is considered a rapidly renewable material considering the bark of the cork oak can be harvested without killing the tree, allowing repeated cycles of production by the 200+ year lifespan of the tree. While cork has lengthy been an appealing choice for flooring, it is now being used to supply building insulation boards, as well.

Like cork flooring,

the cork insulation is plus made from granules of cork that are left by after wine corks have been punched out of the bark. Cork granules are treated under heat and pressure to release a natural binder and produce billets of expanded cork which are thereupon cut to size. The expanded cork has an R-value of 3.6 per inch. This isn’t as good as the highest performance materials, but is […]

[Source] Cynthia


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