
Weatherizing windows with plastic film is an easy and economical way to keep cold air out during winter. It is a simple DIY project that can be done with a window sealing kit or heat-shrink plastic. The process involves cleaning the window frame, applying double-sided tape, and then adhering the plastic film to the tape. Bubble wrap can also be added for extra insulation. A hair dryer can be used to remove wrinkles and shrink the plastic for a tight seal. This method can help reduce energy costs and improve comfort during the cold season.
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What You'll Learn

Clean the window frame
To weatherize your windows with plastic, you'll first need to clean the window frame thoroughly. Here's a step-by-step guide to help you through the process:
- Start by measuring the dimensions of your window sill, trim, and frame. This will help you understand the area you need to clean and prepare for weatherization.
- Using a damp cloth, gently wipe down the entire window frame, including the trim. Ensure that you clean all surfaces that will be covered by the plastic film or tape during the weatherization process.
- If there is any old caulk or peeling paint on the window edges, use a knife to carefully scrape it off. Be thorough, as any remaining residue might affect the adhesion of the plastic film.
- Clean off any debris that may have accumulated during the scraping process. A small brush or vacuum cleaner can be useful for this step.
- Once the frame is clean and dry, inspect it for any gaps or leaks. Caulking your windows can be an effective way to address these issues and prepare your windows for winter.
- Fill a caulking gun with silicone caulking. Apply a fresh bead of caulk between the window frame and siding, ensuring a smooth and even application.
- Allow the caulk to dry completely before proceeding to the next step, which is usually applying the double-sided tape.
Remember, a clean and well-prepared window frame is crucial for effective window weatherization. Taking your time with this step will ensure a better seal and help keep the cold air out during the chilly months.
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Apply double-sided tape
Applying double-sided tape is a crucial step in weatherizing your windows with plastic film. It is important to start with a clean surface, so wipe down the window frame with a damp cloth or rubbing alcohol. Ensure that the window area is completely dry before proceeding.
Once the window frame is clean and dry, you can begin applying the double-sided tape. Apply the tape to the window frame, creating a straight line across the top, bottom, and sides. Make sure the corners meet neatly and that there are no gaps in the tape. This step may require some careful measuring and cutting of the tape to ensure a precise fit.
For added adhesion, consider applying two layers of double-sided tape. After applying the first layer, let it sit for 10-15 minutes. This will allow the tape to become tackier and form a stronger bond. Then, apply the second layer of tape right next to the first layer.
When you are satisfied with the placement of the double-sided tape, it's time to attach the plastic film. Peel off the backing of the tape, exposing the sticky side. Start by adhering the top of the plastic film to the tape, then work your way down the sides, gently pressing the plastic onto the tape to avoid wrinkles. Ensure that you leave at least one inch of excess film on all sides of the tape for a proper seal.
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Attach plastic film
To attach plastic film to your window, you will need a window insulation kit, which includes double-sided tape and plastic film. You may also need a damp cloth, cleanser, scissors, a hair dryer, and a knife.
First, clean the window frame with a damp cloth or cleanser. Allow the window area to dry completely. Next, apply the double-sided tape to your window frame. Apply a straight line across the top, bottom, and sides, ensuring the corners meet and there are no gaps. If you are using bubble wrap, apply two layers of tape and let it sit for 10-15 minutes.
Now, peel off the backing on the first layer of tape and apply the plastic film. If you are using bubble wrap, peel off the second layer of tape and unfold the plastic film. Ensure there is at least one inch of excess film on all sides of the tape. Adhere the plastic film to the tape, starting at the top, then the bottom, and finishing with the left and right sides.
Finally, use a hair dryer on high heat to blow hot air over the plastic sheeting. This will help to remove wrinkles and shrink the plastic film for a good seal. You can also use a knife to cut the plastic film to the correct size, ensuring there are no gaps.
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Remove wrinkles with a hairdryer
Weatherizing windows with plastic film is a great way to stop cold air from entering your home and lower utility bills. Here is a step-by-step guide on how to do it, with a focus on removing wrinkles with a hairdryer:
Prepare the Window
Start by cleaning the window trim with a cleanser and a clean rag. Ensure that the window area is dry before proceeding. Check the caulk seal around the exterior of the window, especially if it is an older window. If needed, use a knife to scrape off any old caulk or peeling paint. Clean off any debris and fill a caulking gun with silicone caulking. Apply caulk between the window frame and siding.
Apply Double-Sided Tape
Apply double-sided tape to the window frame. Apply a straight line across the top, bottom, and sides, ensuring that the corners meet and there are no gaps. If using bubble wrap, apply two layers of tape, allowing the second layer to sit for 10-15 minutes to become tacky.
Attach the Plastic Film
Peel off the backing on the first layer of tape and apply the plastic film. For bubble wrap, start with the bubble wrap first, and then add the plastic film over it. Ensure there is at least one inch of excess film on all sides of the tape. Adhere the plastic film to the tape, starting at the top, then the bottom, and finishing with the left and right sides.
Turn on your hairdryer and set it to high heat. Start at the top of the window and blow hot air over the plastic sheeting, working your way down. This will help remove wrinkles and shrink the plastic film for a good seal. Ensure you heat the entire window and get out as many wrinkles as possible. You can repeat this step as necessary if you are concerned about wrinkles in the plastic.
Tips
- When using bubble wrap, add successive layers and overlap each layer by about 2-3 inches.
- Use packing tape to seal the top of the bubble wrap if it starts to bend downward.
- For small windows, cut the plastic film to the required width in advance.
- If you prefer fresh air from time to time, consider removable magnetic window insulation as a cost-effective and seamless solution.
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Seal gaps with packing tape
Sealing gaps with packing tape is an essential step in weatherizing your windows with plastic film. This process helps to insulate your windows, reducing cold air flow and lowering utility bills.
To begin, ensure your window is clean and free of any debris. Wipe the window trim and frame with a cleanser and a clean rag. Check the caulk seal around the exterior of your window, and if necessary, use a knife to scrape away any old caulk or peeling paint.
Once your window is prepared, apply double-sided tape to the window frame. You can use the tape included in a window insulation kit, or you can opt for magnetic tape. Create a straight line across the top, bottom, and sides of the frame, ensuring the corners meet neatly and there are no gaps.
Now, you can attach the plastic film. Start at the top of the window, pressing the plastic film onto the exposed sticky side of the tape. Work your way down the sides, gently securing the film as you go. Leave at least a one-inch overlap of film on all sides of the tape to ensure full coverage.
Finally, use packing tape to seal any remaining gaps. Seal the top of the plastic film if it starts to bend downward, and reinforce the vertical overlaps to create a cohesive unit. This step ensures that your window is fully insulated, providing an effective barrier against cold drafts.
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Frequently asked questions
The easiest way to weatherize windows with plastic is to use a window sealing kit. Clean the window frame with a damp cloth, then apply double-sided tape to the window frame. Unroll the plastic film and cut according to the window measurements, leaving an excess of up to 5 inches. Press the plastic sheet onto the taped frame, ensuring no gaps. Use a hair dryer on high heat to remove wrinkles and shrink the plastic for a tighter seal.
An alternative to plastic is to use bubble wrap. Apply double-sided tape to the window frame, then add a second layer of tape next to the first. Once tacky, apply the bubble wrap, adding layers and overlapping each layer by 2-3 inches. Seal with packing tape.
Another alternative is to use interior storm windows, which are custom-made to fit your window openings and can last for decades.
Before using a window insulation kit, check the caulk seal around the outside of your window, especially if your window is old. Caulk any gaps between the window frame and siding, and scrape any old caulk or peeling paint. Ensure the moving parts of your window, the sashes, have intact weatherstripping.
Draft stoppers, or draft snakes, are tubes that can be placed along window sills and frames to cover small gaps. Thermal curtains are another option, made from thick, heavy fabric that provides energy efficiency by keeping cold air out.










































