
Installing plastic film on windows is a great way to insulate your home and save money on energy costs. It's a simple and effective DIY project that can be done with a few tools and materials: a hair dryer, scissors, tape, and the plastic film. The first step is to prepare your window by cleaning the frame and glass, ensuring they are free of dust, moisture, and grease. Then, you'll want to measure your window, adding a couple of inches to account for film shrinking. With your measurements, cut the film to size, and apply tape to the edges of the window. Starting at the top, press the film firmly onto the tape, working your way down the window. Use a hair dryer to remove any wrinkles and ensure a tight fit. Finally, cut off any excess film, and enjoy your insulated window!
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Clean the window frame
To clean the window frame before installing plastic film, you must first remove any debris from around the lower sash. Then, close and lock the window. Use a vacuum to clean light dust from the window frame and blinds. If there is grease on the frame, clean it off with a rag and a residue-free solvent such as methylated spirits, white spirit, or rubbing alcohol. Wipe off any moisture and use gentle heat to evaporate any remaining moisture. Ensure that any humidifiers are turned off, and you have not boiled or washed anything with hot water for a few hours. Metal frames can be more difficult to work with, as the cold metal attracts fresh moisture very quickly. Use a plastic brush to scrub off any loose paint or rust from metal frames, being careful not to mar or expose more of the surface than necessary. Allow the window and frame to dry completely before proceeding with the installation.
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Prepare the film
To prepare the plastic film before installation, you must first prepare the window. Clean the window frame to remove any excess dust and grease. If there is moisture on the frame, wipe it off and use gentle heat to evaporate any remaining moisture. Turn up the thermostat or use a space heater to ensure the area is dry. Any loose paint or rust on the frame should be removed with a plastic brush.
Next, open the box of window insulation film, taking care to only use your fingers and not sharp objects, as this may damage the film. If you have multiple sheets of film, only unpack one at a time. Think about how to fit the film to the window. If you have individual window-sized sheets, the process is straightforward, but for very tall windows, you may need to measure first and leave narrow margins. For large windows, you may need to splice sheets with double-sided tape.
If you have one large sheet, consider how to position it on each window to minimise waste. You can apply the film horizontally or vertically, depending on the window size and shape. Unfold the first 12 inches of the film along the entire width of the window, leaving the remainder stuck together. The film is tightly stuck together due to static and can be tricky to separate. If it won't separate easily, moisten your thumbs and gently rub the edge of the folded film until it comes apart.
Finally, apply tape to the top edge of the window, then press the film firmly onto the tape.
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Apply tape
Applying tape is the next step after cleaning the window frame and removing excess dust. Take out the tape from the box, using only your fingers and not any sharp objects, to avoid damaging the film. The tape should be applied around the outside edge of the window.
Apply the double-sided tape to the top edge of the window first. Then, remove the tape liner. If you are using individual window-sized sheets, you can simply press the film onto the tape. However, if you have very tall windows, you may need to leave narrow margins or extend the film to reach the full length.
If you are using one large sheet for multiple windows, you will need to measure and cut the film to size. Add an extra 2 inches to the window's dimensions to allow for shrinking. Starting with the top of the window, press the film firmly onto the tape.
After applying the film to the top edge, apply tape to the sides and bottom of the window. Remove the liner, then unfold the film and press it firmly onto the tape.
If you run out of tape, you can contact the manufacturer, who may send you more for free.
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Attach the film
Attaching the film requires double-sided tape, a tape measure, scissors, and a hair dryer. First, apply double-sided tape around the outside edge of the window, then remove the tape liner. If you are applying film to multiple windows, it is most efficient to apply the tape to all the windows at once.
Next, measure your window and cut the film to size, adding an extra 2 inches to allow for shrinking. If you have individual window-sized sheets, this should be straightforward, but if you have very tall windows, you may need to leave narrow margins or extend the film to reach the full length. You can splice sheets with the double-sided tape or extend them with wide clear mailing tape.
Starting with the top of the window, press the film firmly onto the tape. Work from the right side of the window to the left, ensuring that the loose edge of the film, not the folded edge, is applied to the tape. Repeat this process for the sides and bottom of the window until all sides are sealed.
Finally, use a hair dryer to shrink the film and remove any wrinkles. Cut off any excess film with scissors.
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Remove wrinkles
Installing plastic film on windows is a great way to increase energy efficiency and reduce heat loss. It is an inexpensive way to add an extra layer of insulation to your windows, which can help your house feel warmer during the winter months.
To remove wrinkles when installing plastic film on windows, follow these steps:
- Use a hairdryer: After applying the plastic film to the window, use a hairdryer to heat the film and shrink it. Hold the hairdryer a few inches away from the film and work in a pattern, such as a spiral from the corners towards the centre. This will help remove wrinkles and create a smooth finish.
- Avoid overheating: Do not hold the hairdryer too close to the plastic film, as this can reduce airflow and potentially damage the film or overheat the hairdryer. If the hairdryer turns off on its own, let it cool down for about half an hour before continuing.
- Work in sections: Avoid trying to shrink one area completely before moving to the next, as this can cause uneven tension and separate the film from the tape. A little bit of shrinkage in one area will help remove wrinkles all over the film.
- Stretch the film: If you want to reuse the plastic film, you can carefully stretch it to remove wrinkles instead of using a hairdryer. However, this method may not yield the best results, and it is recommended to use new film each season.
- Use a blow dryer: A blow dryer can also be used to adhere the film and remove wrinkles. Start by going around the border of the window frame, and then address any remaining wrinkles. Be careful not to touch the plastic directly with the blow dryer, as it can melt the film.
- Prepare the window: Before applying the plastic film, ensure the window is clean and free of any dust, fibres, or paper towel residue, as these can cause bubbles. Use a lint-free towel, such as a microfiber cloth, to wipe down the window.
- Smooth metal frames: If you have metal-framed windows, ensure the surface is smooth by removing any loose paint or rust with a plastic brush. Metal frames attract moisture, so it is important to prepare the surface properly.
- Use a kit: Consider purchasing a window film kit, which includes tape, a tape measure, scissors, and a blow dryer. These kits are designed for easy application and can be found at home improvement, hardware, or discount stores.
- Measure and cut: Measure the window precisely, including width and length, and cut the window film to size, leaving a bit of extra material for leeway. This will ensure a perfect fit and help create a smooth finish without wrinkles.
- Spray and clean: Prepare the glass by spraying it with a slip solution and using a scraper to clean the entire panel, including the edges. Then, spray the window again and use a squeegee to remove any remaining water.
By following these steps and paying attention to the process, you can effectively remove wrinkles when installing plastic film on your windows.
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Frequently asked questions
Clean the window frame and remove any debris from around the lower sash. Close and lock the window, then clean and adjust the blinds. Allow the window and frame to dry.
You will need a hair dryer, scissors, tape (double-sided tape is recommended), and a tape measure.
Apply tape to the top edge of the window, then remove the liner. Roll the film across the tape, starting from the right side of the window and moving left. Cut the film to size. Press the film firmly onto the tape, then apply tape to the sides and bottom of the window. Remove the liner again, unfold the film, and press it onto the tape.
Use a hair dryer to shrink the film and remove any wrinkles.
Metal frames must be smooth. Remove any loose paint or rust with a plastic brush.











































