Published on August 29th, 2012 | by Henri


Adding attic insulation

Q.    I have faced insulation that I want to install over existing insulation in my attic. Should the insulation be placed with the facing up or down? Thank you for any information.

A.    The vapor retarder should be peeled off before you put the new insulation over the existing one. A vapor retarder should not be on the cold side of the insulation and should not be sandwiched between two layers of insulation unless the R-factor above (on the cold side of) the vapor retarder is twice as much as the R-factor below (on the warm side) of the insulation.

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