Usually less expensive than closed cell insulation, open-cell delivers a superior air barrier and is often used to insulate interior walls to minimise outdoor noise intrusion. Demilec open-cell spray foam insulation has been developed through innovative formulas and long experience: its many advantages include a revolutionary fire-safety option. Not recommended for outdoor applications.
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A higher-density foam than open-cell, closed-cell spray foam insulation is an air barrier, water-resistive, and vapour barrier.