What You'll Need

• Window insulation film kit, sized to your window (about $10-15)
• Removable double-sided tape included in the kit, rated for painted trim and clean removal
• Hair dryer you already own, for shrinking the film tight
• Scissors or a utility knife for trimming (about $0-5)
• Rubbing alcohol and a soft cloth to clean the frame (about $2)
• Measuring tape (free if you own one)

How to Do It

1. Clean the window frame with rubbing alcohol and a cloth, then let it dry fully so the tape sticks well.
2. Test the tape on a small, hidden spot of trim first to confirm it removes cleanly. Skip any surface that looks fragile or flaking.
3. Measure the window and cut the film about 2 inches larger on every side.
4. Apply the double-sided tape around the frame, pressing it firmly onto the trim only, never the glass or wall.
5. Attach the film to the tape, starting at the top and smoothing down the sides and bottom so it's snug.
6. Shrink the film with a hair dryer on medium heat, moving steadily until wrinkles disappear. Keep the dryer a few inches away.
7. Trim the extra film around the edges with scissors for a tidy finish.
8. Remove at move-out or in spring by peeling the film off slowly and then lifting the tape with gentle warmth from the hair dryer. It leaves no residue.