When is it necessary to use foil-faced insulation?
I am insulating an exterior wall (8″ CMU with direct applied 1/2″ stucco) with 1 1/2″ rigid closed cell insulation which is placed on the inside face of the CMU in a furred out (1 5/8″ metal framing) interior wall. can I use regular closed cell insulation or is this an application which is better suited for a foil face closed cell rigid insulation.
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