How to Install Duct Wrap Insulation


Duct wrap is an insulation material made of fiberglass. One side of the wrap has a foil vapor barrier that protects the insulation from damage. Since heating and cooling ducts are made of metal, they quickly conduct heat out of the duct when heating and into the duct when cooling. This creates significant inefficiencies in your system which will be reflected in your energy bill. Duct wrap also serves to prevent your ducts from sweating when you run your air conditioning.

Things You'll Need

  • Tape measure
  • Duct wrap
  • Utility knife
  • Foil tape
  • Dust mask
  • Measure each side of your duct work. Add these measurements together to come up with the perimeter. The perimeter in this case is the distance all the way around the duct work.

  • Roll out your insulation on the floor or another flat surface. Measure out the distance you calculated in step 1. Add about 4 to 6 inches to this measurement. This allows for the thickness of the insulation and creates an overlap so you can tape your insulation down tightly.

  • Cut through the insulation and foil layer with your utility knife. Use a sharp blade to prevent ripping or shredding of the insulation.

  • Drape the duct wrap insulation blanket around the duct. Tape one end down to the duct with foil tape and pull the other end tightly. Notice that you will have a few inches of overlap in the insulation. Tape this end down tightly to the insulation.

  • Measure and cut another piece of insulation. Secure this to the duct in the same fashion as you did the first piece of insulation. Tape the seam around the entire duct where the two pieces of insulation meet. Continue to cut and fasten insulation to the duct until it is completely wrapped.

Tips & Warnings

  • Dust masks should always be worn when working with insulation. The fiberglass fibers are lung irritants.

Related Searches


  • Photo Credit BananaStock/BananaStock/Getty Images
Promoted By Zergnet


You May Also Like

  • How to Insulate A/C Ducts

    Without insulation, air moving through duct work will warm up or cool down depending on the application. Warm air coming from a...

  • How to Wrap a Heating Duct

    Wrapping heat ducts is crucial to keep air warm as it travels from the furnace through the ducts, especially where ducts are...

  • How to Insulate Elbow Ductwork

    The proper installation of ductwork insulation is just as important as the insulation of walls and ceilings. Properly placed ductwork insulation can...

  • How to Install Insulation Around Duct Work

    There are several different methods used to heat homes, one of which is a forced-air heating system. This is a system which...

  • How to Install an Insulated Flexible Duct

    For buildings that use a forced-air heating and air conditioning system, ductwork is an essential part of that system. One type of...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!