Step 2: Winterize Windows with a Shrink-Film Kit
Once the window is sealed around the edges, you’re ready to add a clear interior barrier. Popular options include:
- Duck Brand Shrink Film Window Insulation Kit
- 3M Window Insulator Kit
Why this works so well:
- It seals air leaks around the entire interior perimeter of the window.
- It creates a thin insulating air gap, boosting the window’s overall R-value.
How to Install a Window Insulation Kit
- Clean the trim: Wipe the interior window trim where the tape will go so it’s dust- and grease-free.
- Apply the double-sided tape: Run the tape around the entire perimeter of the window, usually on the trim or frame.
- Cut the film: Measure and cut a slightly oversized piece of plastic film.
- Attach the film: Carefully press the film onto the tape, starting at the top, then the sides, then the bottom. Keep it reasonably tight but don’t worry about small wrinkles yet.
- Shrink it with a hair dryer: Use a hair dryer on warm to gently heat the film. It will tighten, shrink, and pull out most wrinkles, leaving a clear, nearly invisible barrier.
- Trim the excess: Use scissors or a utility knife to trim extra film for a neat finish.
Hint: If you have mini-blinds, you can often mount them inside the window frame or between the film and curtain rod so they still operate with the film in place.
Pros and Cons of Shrink-Film Window Kits
Advantages:
- Very low cost per window
- Big comfort improvement in drafty rooms
- Quick and easy DIY project—no special tools needed
Drawbacks:
- The tape can damage paint or varnish when removed in spring if you’re not careful.
- It’s a temporary, disposable solution, so you’ll reapply it each winter and throw away the old film.
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