
Do-it-yourself plastic film storm windows are a cost-effective way to improve the energy efficiency of your home. By adding a layer of plastic film or plexiglass over your existing windows, you can create an insulating barrier that reduces heat loss and condensation during cold weather. These DIY storm windows are easy to install, requiring just a few tools and materials such as plastic film, vinyl, wood, and adhesive. They can be customised to fit windows of various sizes and are a great option for renters or those who cannot install exterior storm windows. With DIY plastic film storm windows, you can enjoy increased comfort and energy savings without breaking the bank.
Characteristics and Values of DIY Plastic Film Storm Windows
| Characteristics | Values |
|---|---|
| Materials | Plastic film, plexiglass, vinyl, wood, glass, aluminium |
| Cost | Low, inexpensive |
| Installation | Easy, simple, DIY |
| Heat Loss | Reduced by 10-60% |
| Ventilation | Poor, main window cannot be opened |
| Maintenance | Plastic film replaced annually, moulding and spline can be reused |
| Function | Traps hot or cold air, reduces condensation |
| Use | Interior or exterior |
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What You'll Learn

Plastic film kits
There are a variety of plastic film kits available on the market, and they typically include clear plastic film or sheeting, and framing materials such as cardboard, thin wood or vinyl strips, and double-sided tape for installation. Some kits may also include heavy-weight clear polyethylene film, extruded vinyl strips, or rigid clear plastic styrene sheets that form a permanently installed frame. These kits can be purchased from companies like Frost King, New Resources Group, Inc., Mortell Company, and Plaskolite, Inc.
When selecting a plastic film kit, it is important to consider the size of your windows and the type of framing material that will best suit your needs. For example, vinyl strips may be more suitable for larger windows as they provide a stronger frame. Additionally, the type of plastic film should be considered as some types may be more durable or have better clarity than others. Mylar, for example, is known to be expensive but durable, while polyethylene tends to turn brittle within a few months.
Installing a plastic film kit is generally a straightforward process. The plastic film is typically stapled or tacked around the outside of the window frame, with the framing material forming a "frame" around the plastic. For indoor installations, the film can be installed using double-sided tape, which can be easily removed at the end of the season. It is important to note that once the plastic sheet is installed, the main window cannot be opened until the plastic is removed.
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$8.99 $11.99

Window insulation
One of the simplest and least expensive forms of window insulation is to use a clear piece of flexible vinyl film that is stapled or tacked around the outside of the window frame. This plastic film can be purchased by the yard or in sheets of various sizes, and it is often sold in kits that include cardboard or thin wood strips to form a "frame" around the plastic. These kits are designed to be replaced annually and can be found at most hardware stores.
For a more permanent solution, you can create your own DIY storm windows using plexiglass or vinyl. Plexiglass is a long-lasting and low-cost material that is as clear as glass, easy to work with, and weather-resistant. It can be cut to size using a table saw, and then assembled into a frame using wood glue and silicone caulk. This option requires more time and skill but can provide a more durable solution.
Another option for window insulation is to use a Window Insulation Kit, which includes plastic sheeting and clear adhesive tape. This kit is designed to be installed on the backside of the window frame, creating an airtight seal that traps hot or cold air. The plastic is stretched tightly across the frame and heated with a hairdryer to create a smooth, wrinkle-free surface.
When choosing a window insulation method, it is important to consider the climate and the desired level of comfort. In colder regions, adding extra layers of insulation can help reduce heat loss and improve comfort near windows. Additionally, it is worth noting that interior storm windows should be removed during milder months to allow the home to ventilate properly.
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Materials and costs
The materials you will need to create your own plastic film storm windows include wood, plastic film, and vinyl. You can purchase a Window Insulation Kit, which includes plastic sheeting and clear adhesive tape, or buy the materials separately. The kit is very simple to use and is a less expensive option. It is priced at approximately $8.50 to $14.85. The kit comes with double-sided tape that you apply around the perimeter of the backside of the frame of your interior storm window. You then lay the plastic down, pressing it in place and cutting off any excess with a razor knife or scissors.
If you choose to buy the materials separately, you will need to purchase wood framing and plastic shrink film from a hardware store. The wood is used for assembling screens, and the plastic shrink film is stretched across the frame by heating it with a hairdryer. You can then attach the plastic to the frame using either double-sided tape or staples.
The type of plastic film you use is important. Mylar is too expensive, polyethylene ages and turns brittle in a matter of months, and fiberglass isn't transparent enough. Sears’ 4-mil “super clear vinyl” is a good option as it has no visual distortion, stays flexible to -26 degrees Fahrenheit, and stays clear for 2 to 3 years in direct sunlight.
To construct your own storm windows, you will need to cut 45-degree angles on the ends of each frame piece. You will also need silicone caulk, wood glue, and a table saw. Remember to wear safety glasses when operating the table saw.
You can also use plexiglass to make storm windows, which is a long-lasting and low-cost material. It is as clear as glass, easy to work with, and weather-resistant. You can cut the plexiglass yourself using a table saw, or your local hardware store may offer plexiglass cutting services.
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Installation process
The installation process for DIY plastic film storm windows is relatively straightforward, and there are several ways to go about it. Here is a comprehensive guide on how to install plastic film storm windows:
Materials and Preparation:
First, you will need to gather the necessary materials. You can purchase a window insulation kit, which typically includes plastic sheeting and clear adhesive tape. Alternatively, you can source the materials individually, including wood framing, plastic film (such as vinyl or polyethylene), staples or tacks, and double-sided tape.
Before beginning the installation, measure the height and width of your window from the exterior. Increase the dimensions by approximately 2 inches to determine the required size for your storm window.
Constructing the Frame:
If you are making your own frame, cut the wood framing to size, ensuring that the ends of each piece have a 45-degree angle. Assemble the frame by joining the pieces with wood glue or silicone caulk. You can also use clamps to hold the frame together while the glue dries, or follow the tip of wedging the frame in the window until it dries.
Attaching the Plastic Film:
Once your frame is ready, stretch the plastic film across it. You can use a hairdryer to heat the plastic, making it easier to stretch and removing any wrinkles. Ensure the plastic is taut and secure it in place using either double-sided tape or staples.
Final Touches:
After the plastic film is attached, trim off any excess plastic with a razor knife or scissors. To finish, apply self-adhesive felt, foam, or rubber gasket along the perimeter of the frame. This will help the frame fit snugly in the window and allow for easy removal and reinstallation.
Additional Considerations:
It is important to note that, with this type of storm window in place, the main window cannot be opened. These plastic film storm windows are intended to be removed during milder months to allow for proper ventilation.
Additionally, when selecting your plastic film, consider the climate and conditions it will be exposed to. For example, Mylar is a good option for clarity and durability but can be expensive, while polyethylene may become brittle over time.
Finally, always prioritize safety when working with tools and materials. Wear safety glasses when using a table saw, and be cautious when handling sharp objects like razor knives or scissors.
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Maintenance and longevity
The longevity of your DIY plastic film storm window will depend on the type of plastic film you use. For example, polyethylene will only last a few months before turning brittle, while vinyl can stay clear for 2 to 3 years.
To ensure the longevity of your plastic film storm window, it is important to install it correctly. Tacking and stapling is a low-cost and quick method, but it damages the window frame. A more durable option is to construct a wooden frame and staple the plastic film to it, before mounting the frame to the window. You can also use vinyl moulding with a pressure-sensitive adhesive back, which can be installed by pressing it into place.
If you are using a plastic film storm window kit, follow the manufacturer's instructions carefully. For example, the Mortell Company's kit includes heavyweight clear polyethylene film with extruded vinyl strips that form a permanently installed frame. The In-Sider kit by Plaskolite includes a rigid, clear plastic styrene sheet that is reusable year after year.
To maintain your plastic film storm window, you will need to replace the plastic film annually. At the end of winter, remove the spline and save it for next year, discarding the plastic film. You can use the same moulding and spline to create screens during the summer by replacing the clear film with a sheet of fibreglass screening. In the fall, switch back to the plastic to recreate your storm window.
If you are using a wooden frame, you may need to treat the wood to protect it from the elements. You should also ensure that the plastic film is taut and securely attached to the frame to prevent sagging or tearing.
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Frequently asked questions
You will need wood framing, plastic sheeting, and clear adhesive tape. You can also use double-sided tape or staples to attach the plastic film to the frame.
You can use either vinyl or polyethylene film. Vinyl is a good option if you want something clear and flexible that transmits nearly 100% of the light that strikes it. Polyethylene is less expensive but tends to turn brittle within a few months.
First, assemble the interior storm window frame and make sure it fits your existing window. Then, stretch the plastic film across the frame by heating it with a hairdryer. Finally, attach the plastic film to the frame using double-sided tape, staples, or adhesive tape.










































