Position the barrier perpendicular to heat stream having a minimum amount 3/four-inch air hole for best effectiveness. For optimum efficiency mount the barrier within the underside of one's roof rafters employing furring strips to keep up appropriate spacing. If there is not less than eighteen in. (or in a cold https://ohyesdirectory.com/listings560747/a-simple-key-for-how-to-isolate-roofs-unveiled