n the industry standard laboratory rating for insulation material, the higher the number the more thermal insulation value. However, when installed high R-value materials alone cannot compete with Icynene spray foam. Foam insulation will outperform fibreglass 2 to 1 in terms of use in a real building! Air tightness coupled with R's = double the energy savings. 76mm (3") of Icynene® has an energy savings performance value equal to or exceeding R-19 and 127mm (5") equals R-30
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