If you need a fast fix, try a layered approach that’s easy to install with basic tools.

1. Seal the gaps: Clean the frame, then add self-adhesive weatherstripping along the sash and frame where you feel air.
2. Tape the seams: Use clear sealing tape around the window edges or between the sashes to cut down on sneaky drafts.
3. Add a thin barrier: An interior window insulation film can create a clear air pocket that helps reduce heat loss.
4. AC windows: If there’s a window AC, insert insulated foam side panels.

These steps can noticeably reduce drafts, though results may vary by window condition.

You’ve got a few solid options, depending on your window and how temporary you want the fix to be.

• Interior insulation film: Clear film creates an air barrier that can help reduce heat loss without blocking light.
• Weatherstripping: Foam, silicone, or V-strip seals help close gaps around sashes and frames.
• Transparent sealing tape: Useful for quick, removable edge sealing along frames and meeting rails.
• Insulated foam panels (for window ACs): Fill side gaps and add coverage around the unit.
• Reusable insulated covers: Thicker, clear panels/films can be installed for the season.

For renters, look for removable adhesives or tapes that are designed to come off cleanly.

Start by finding where the air comes in, then match the seal to the gap.

• Sliding/sash tracks: Use V-strip or wedge weatherstripping to flex with movement.
• Uneven frame gaps: Compressible foam tape helps fill small, irregular spaces.
• Fine hairline leaks: Clear silicone seal strips or transparent sealing tape can help along edges.

1. Clean and dry the surface for better adhesion.
2. Measure and cut to length; avoid overstretching foam or silicone.
3. Apply in moderate temperatures and press firmly.
4. Test that the window still opens/closes safely.

For extra insulation, consider adding an interior film after sealing. Avoid blocking required ventilation or emergency egress.

A quick measure helps you pick the right kit and avoid waste.

1. Measure the opening: Record the inside trim width and height for each window.
2. Add overlap: Add about 1–2 inches on all sides so the film can adhere to the frame.
3. Count your windows: Choose a single- or multi-window roll that matches your total coverage.
4. Check surface type: Ensure the included tape is compatible with your trim finish; test a small spot first.
5. Plan tools: You’ll typically need scissors and a hair dryer to tighten the film.

Avoid covering windows needed for emergency exit or areas requiring ventilation.

Yes, you can reduce drafts around a window AC with a few simple add-ons.

1. Side coverage: Fit insulated foam side panels to fill the gaps between the unit and the frame.
2. Frame sealing: Add self-adhesive foam weatherstripping along the bottom sash and frame where light or air shows through.
3. Edge tape: Use clear sealing tape along seams for extra protection during colder months.
4. Keep it safe: Don’t block the unit’s vents or drainage. For seasonal setups, choose removable adhesives.

This combination can help cut drafts while keeping your AC secure and functional, but effectiveness depends on the window and unit fit.