How to insulate Sheet Metal Duct and Fittings
Fiberglass Insulation is available in 36" wide rolls or 36" wide rolls that have been cut into 4 - 9" wide rolls per bundle. The 36" wide rolls are great for insulating sheet metal duct runs and the 9" wide rolls are great for insulating fittings. Simply unroll the fiberglass and wrap around the duct in a spiral fashion making sure to overlap the ends at least 1" to make sure that all of the exposed metal is covered. For a more secure installation, use Fiberglass Spray Glue adhesive to attach the fiberglass to the sheet metal.