Thermwell Identification

• Consumers searching for Thermwell's foil foam duct insulation within home improvement facilities will not be able to find it through this brand name. Thermwell Products owns multiple companies, offering items as varied as caulk, tape and cutting machinery. However, the weatherstripping and insulation company portion is sold in retail stores under the brand name Frost King.
  
  

Foil Foam Features

• Thermwell offers duct insulation in 1- and 2-inch thick versions. The insulation comes manufactured as a 12-inch wide roll. The insulation's main composition is fiberglass with a layer of aluminum foil residing on the outside surface. Installers wrap the insulation around ducts with the aluminum foil facing outwards, creating a protective layer across the duct's surface.
  
  

Heat Resistance Value

• Thermwell's foil foam duct installation has a heat resistance value of R-6. In general, a larger R-value reflects more resistance to heat leaving a designated area, saving a home from costly energy losses. R-6 is a common value used specifically for duct insulation, as opposed to wall insulation that may have higher values. However, the installer must wrap and secure the duct insulation without any gaps or openings for this R-value to be effective against heat loss.
  
  

Considerations

• Thermwell's thinner 1-inch thick duct insulation offers self-adhesive features, negating the need to wrap tape around the duct's outside, which is required of the standard 2-inch thick foil foam insulation. The self-adhesive feature aids installers in especially tight duct areas, allowing effective insulation installation in almost any building crevice.