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R- 21 Attic Wall Unfaced Reflective Roll Insulation 133.3-sq ft ( 16-in W x 100-ft L ) Individual pack

Reflectix R- 21 Attic Wall Unfaced Reflective Roll Insulation 133.3-sq ft ( 16-in W x 100-ft L ) Individual pack

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Attic ceiling fan space using paper backed R-19 to put in and out . Take fan blade off and put insulation - would this be better product to use here?