How to Insulate Vinyl Windows

Insulation Behind the Window Trim

• 1

  Insert the knife around the window trim and cut away the old paint and silicone. It may be built up, so this could take some time.

• 2

  Remove the window trim, using the crowbar. Remove nails with the hammer. If your trim is held in place with screws, remove it with the cordless drill and screw bits.

• 3

  Cut out any old insulation with the utility knife. Some windows may have no insulation at all.

• 4

  Insert backer rod insulation into the cavity between the window frame and the wall studs. Don't be afraid to pack it in place.

• 5

  Spray in non-expanding foam in the smaller spaces.

• 6

  Put the trim back with new stainless steel screws. Use the cordless drill and screw bits.

• 7

  Apply a bead of silicone to the outside edge of the window trim. Let dry for several hours.

Window Film Insulation

• 8

  Clean the window with glass cleaner.

• 9

  Measure the window width and height. Add an extra 1/2 inch to each side, top, and bottom, to allow the film to shrink in place.

• 10

  Apply the double-stick tape to the outer edge of the window. Leave the paper in place on the top side of the tape.

• 11

  Cut the film to size and apply to the window, starting from the bottom and working your way slowly up to the top. Use the squeegee to remove air bubbles and remove the top section of paper as you press the film to the window.

• 12

  Apply the squeegee to remove air bubbles and remove the top section of paper as you press the film to the window.

• 13

  Heat-shrink the film to the window with the blow-dryer. Cut any excess film away with the utility knife.