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Were the insulation batts installed correctly?

April 26, 2017batts correctly installed insulation

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Were the insulation batts installed correctly?

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Mary writes from Rochester, News York: “We live in a frame house built in 1920. There is loose insulation in the attic floor. There is no heat to the attic; it naturally flows from the second floor when the door is opened. We added 4″ foil-faced insulation between the roof joists with the foil facing the interior. The attic space was finished with wallboard ceiling and knee walls. Questions: Were the batts installed correctly with the foil facing the interior? To increase the R-value, can we add 2″ panels of rigid insulation over the batts? We would attach them directly to the joists with a glue product. We are hoping that adding insulation to the roof would help in preventing snow melt/ice dam problems.” Answer: Yes the foil facing would face the interior. Although FOAMULAR® insulation was not designed for the application you describe I do not see any problem with it. Keep in mind that codes generally require covering foam insulation with a 15 minute thermal barrier for fire safety.