Hi I am looking to insulate circular metal air ducts in my basement because the air reaching some of the farther rooms (from furnace) on the second floor of my home is comparatively much cooler.
I was planning on wrapping r12 blanket pink fibreglass insulation I bought it in a 40ft roll.
However I am wondering if I can use this since it does not have the shiny reflective coating on the outside of the insulation that normal duct wrap insulation has. I do not know what that reflective coating is for or if it is even necessary.
In addition I have read that insulating the air ducts will actually trap heat into the insulation(remove from air) if not wrapped at a proper CLEARANCE, is this true or can I wrap the insulation right up against the metal ducts?