
Plastic window film is a common method used to increase energy efficiency and reduce utility bills by preventing heat loss during the winter. The plastic film is cut to fit the window, taped onto the window frame, and then blow-dried to adhere to the window and remove any wrinkles. While this method is inexpensive and easy to install, some sources argue that it does not have a significant impact on energy bills and is only a temporary solution.
| Characteristics | Values |
|---|---|
| Purpose | To increase energy efficiency, reduce drafts and utility bills |
| Tools | Window film kit, tape measure, scissors, blow dryer |
| Steps | Clean the window, cut the film, attach the film to the adhesive tape, smooth out bumps, use the blow dryer to adhere the film, trim excess plastic |
| Tips | Keep the blow dryer moving, avoid touching the plastic with it, stretch the plastic film for a smooth finish |
| Effectiveness | May not have a huge impact on energy bills, minimal effect according to a blower door test |
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What You'll Learn

Clean the window with warm water and soap
To clean your windows with warm water and soap, you can make a simple solution by mixing two cups of warm water with a quarter cup of white vinegar and half a teaspoon of dish soap. You can also add a few drops of ammonia to this mixture to help remove greasy dirt. If you don't have vinegar, you can use just warm water and dish soap, mixing about two gallons of water with a teaspoon of dish soap.
Before you begin cleaning the glass, sweep away any cobwebs and debris from the windows and sills using a broom. You can also use a soft brush or sponge to wipe down the window surfaces.
Now, spray your window panes with the cleaning solution and wipe off the grime with a microfiber cloth, rubbing in a circular motion. You can also use a squeegee, starting at the top of the window and pulling it down in a straight motion. Repeat this process until you've covered the entire window.
Finally, use a dry microfiber cloth to wipe away any remaining moisture from the window, focusing on the edges and corners. You can also use a separate lint-free rag to wipe the perimeter of the window and remove any remaining suds.
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Measure the window and cut the plastic film
To blow-dry plastic on windows, you'll first need to measure the window and cut the plastic film to size. Here's a step-by-step guide to help you through the process:
Start by using a tape measure to record the exact width and height of the window pane. It's important to be as accurate as possible when taking these measurements. Once you have the dimensions, add an extra inch to each side. This extra inch will ensure that the plastic film overlaps the window pane and can be properly secured.
After you've noted the measurements, it's time to cut the film. Using a sharp pair of scissors or a blade, carefully cut the film according to the measurements you've taken. It's always better to cut slightly larger than needed, as you can always trim the excess later. Repeat this process for each window, as each pane may have slightly different dimensions.
When cutting the plastic film, it's important to work on a clean, flat surface. Lay the film down smoothly and use weights or tape to prevent it from moving around. This will help you achieve a straight and precise cut. Take your time with this step, as an accurately cut film will result in a neater finish and better insulation.
Once you have the plastic film cut to size, you're ready to move on to the next step of attaching the film to the window. However, before you do that, it's crucial to ensure that the window pane and frame are thoroughly cleaned. This will help the plastic film adhere properly and create a strong seal.
By carefully measuring, adding a buffer, and cutting the plastic film, you've set the foundation for effective window insulation. Remember that accurate measurements are key to achieving a snug fit, which is essential for retaining heat and reducing energy costs. With these steps, you're well on your way to a cozier and more energy-efficient home.
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Attach the film to the window using adhesive tape
Plastic window film is a common method used to increase energy efficiency and reduce heating costs. It is a low-cost method to provide extra insulation to your home. To attach the film to the window, you will need a window film kit, tape measure, scissors, and an adhesive tape.
Firstly, clean the window and window frame with a mixture of warm water and dish soap. Then, use the tape measure to record the exact dimensions of the window, and add one inch to each side. Cut the film according to these measurements. Starting at the top corner, attach the window film to the adhesive tape. Ensure that the adhesive tape is applied around the entire window frame. You can reposition the tape until you achieve a good fit. Smooth out any bumps or wrinkles using your hands.
It is important to note that the adhesive tape usually comes with the window film kit. However, if it is not included or if you need additional tape, you can purchase double-sided adhesive tape from a hardware store. While this method is popular, it is important to note that some sources suggest that the impact on energy bills may be minimal.
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$38.4

Smooth out bumps and wrinkles with your hands
Plastic window film is a great way to insulate your windows and reduce heat loss. It's an effective, low-cost method to keep your home cosy during the colder months.
When installing plastic window film, it's important to ensure the film is smooth and free of any bumps or wrinkles. After cutting the film to size, you can begin attaching the film to the adhesive tape. Start at the top corner and work your way down the window, keeping the film slightly taut to avoid any sagging. Use your hands to smooth out any bumps or wrinkles as you go.
- Use firm, even pressure when smoothing the film with your hands. Apply pressure in a downward motion, working from the centre out towards the edges.
- Take your time and work in small sections. This helps to prevent the formation of new wrinkles or creases as you smooth out existing ones.
- Stretch the film gently as you smooth it to remove any minor wrinkles. This is especially useful for smaller wrinkles, as stretching can remove them without the need for additional heat treatment.
- Ensure your hands are clean and dry before starting. This helps to avoid transferring dirt, oil, or moisture onto the film, which can affect its adhesion and increase the likelihood of wrinkles.
While using your hands is an important first step, you may also need to use a blow dryer on a low heat setting to fully adhere the film and remove any remaining wrinkles. Be careful not to let the blow dryer touch the plastic, as it can cause melting.
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Use a blow dryer to adhere the film to the window
To use a blow dryer to adhere plastic film to a window, start by measuring the window and cutting the film with an extra inch on each side. Attach the film to the adhesive tape at the top corner of the window frame. Smooth out any bumps or wrinkles using your hands.
Next, turn on your blow dryer. Starting at the border of the window frame, use the blow dryer to heat the plastic film and adhere it to the window. Be careful not to touch the plastic with the blow dryer, as this can cause it to melt. Keep the blow dryer in constant motion, moving it repeatedly over an area until the film shrinks and adheres to the window.
Once the border is complete, address any remaining wrinkles in the plastic film. Again, be cautious not to let the blow dryer come into direct contact with the plastic. After removing all wrinkles, you can trim any excess plastic from the edges.
By following these steps, you can effectively use a blow dryer to adhere plastic film to your windows, improving insulation and reducing heat loss during the colder months.
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Frequently asked questions
Blowing hot air onto plastic film stretched over a window helps to shrink-wrap the plastic, creating an airtight seal that reduces drafts and energy waste. This can lower your heating costs.
First, cut the plastic film to fit your window, leaving an extra inch on each side. Then, attach the film to double-sided adhesive tape around the window frame. Smooth out any bumps or wrinkles with your hands, then use a blow dryer on low heat to adhere the film, starting at the border and working inwards. Do not touch the plastic with the blow dryer as it may melt.
Yes, make sure you do not touch the plastic with the blow dryer as it will melt. Also, ensure you are using indoor plastic film as the outdoor variety may not shrink as expected. Additionally, note that window insulation kits may not have a significant impact on energy bills and will not solve underlying issues causing heat loss.











































