How to Insulate Your Windows with Plastic

This winter, keep heat in and cold out by sealing your windows with plastic.


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You Will Need

  • A blow-dryer
  • Plastic wrap
  • Double-sided tape
  • Dry-cleaning bags
  • Bubble Wrap


  1. Plastic can be dangerous. To avoid danger of suffocation, handle with care and keep away from babies and children.

  2. Step 1

    Get an insulation kit

    Go to your local hardware store and get an indoor window insulation kit. It will provide double-sided tape and sheets of shrink-wrap plastic that, when affixed to your windows according to the accompanying instructions, provide a weather seal you can see through.

  3. If you don’t care about visibility and appearance, plastic dry-cleaning bags and duct tape will do the trick; just slit the bags open, cut them to size, and tape them over the windows.

  4. Step 2

    Wash your windows

    Wash and dry your windows. The plastic wrap won’t cling as well to a dirty surface.

  5. Step 3

    Take measurements

    Measure your window frames, and then measure and cut the plastic to match, leaving a little wiggle room. You can always trim later with an Exacto knife.

  6. Step 4

    Tape around the windows

    Press double-sided tape on the outside edge of the molding. Take care not to stick the tape to the wall.

  7. Step 5

    Attach the plastic

    Firmly attach the edges of the plastic sheet to the tape, smoothing the sheet down as you go. Then run a hot blow-dryer back and forth over the plastic sheet so that the heat shrinks it, forming a tighter seal.

  8. Leave one window in each room unwrapped as a fire escape.

  9. Step 6

    Slap on Bubble Wrap

    For an even easier insulator, try Bubble Wrap: Just mist your windows with water and slap it on; it will stick until you take it off.

  10. Drafty windows can increase your heating bill by 30 percent.