Radiant barriers

BC Tom

Is it cost effective to install some sort of radiant barrier/insulation on the underside of rafters in an attic where an AC unit is located to reduce attic ambient?

Unknown

If you're trying to keep heat out, generally yes, radiant barriers are good for that.

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Ron Schroeder_3

Hi BC Tom,

Also even 2 inches of cellulose added over the top of fiberglass will reduce the flow of radiant heat from the attic to the living space.

Ron