As a cost-effective alternative to full window replacement, Casco Storm Windows offer an additional layer of protection over your existing aluminum, aluminum-clad, or wood windows. Our storm windows not only help you save on energy bills but also mitigate interior drafts, condensation, and outdoor noise, creating a more comfortable living environment. And for comprehensive protection, consider complementing your setup with a color matched Casco Storm Door, safeguarding your entry and service doors with the same level of efficiency!

  • Standard Features

    • Custom sizing designed specifically to fit your window opening, with stocking programs available for dealer and lumber yards.
    • Crafted with heavy duty extruded aluminum sash and frame, reinforced with frame weather-stripping for enhanced durability and weather resistance.
    • Eight standard painted exterior colors, clear anodize, or mill finish options, providing flexibility to match exterior aesthetic and ensuring a maintenance-free and visually appealing finish.
    • Comes with a standard fiberglass mesh screen insert and clear annealed single pane glass inserts.
    • Equipped with a mounting flange for effortless surface mount installation to blind stop or brickmold (trim), making the setup process a breeze.
    • Pre-punched installation holes and included installation screws simplify the setup process, while an installation guide provides step-by-step instructions.
    • Maximum size varies based on the window type, offering flexibility to accommodate various dimensions.

    Optional Features

    • Color matched sill expander (in two different heights) can be provided to accommodate uneven sills, ensuring a visually appealing appearance while also facilitating proper drainage.
    • PetScreen and BetterVue screen fabric, offering durability and improved visibility for an enhanced storm window.
    • LoE x89 glass, maximizing energy efficiency and reducing heat transfer for a more comfortable indoor environment.
    • Available options for tempered safety and obscure glass, provide safety and privacy where needed without compromising natural light transmission.
    • Plexiglass, offered as an alternative to glass, provides versatility and durability while maintaining excellent visibility.
    • Upgraded die cast metal corner keys and latching hardware.
    • Exterior mounted frame stabilizer bar can be included to reinforce the window frame and improve structural stability, ensuring long-lasting performance.
    • Choose from Estate Colors or opt for a Custom Color, allowing you to personalize your windows to match your unique style and preferences.

    Made in USA

  • Standard Colors






    Dark Bronze


    Clear Anodize

    Estate Colors

    Bright White











    Spring Green





    Ice Blue





    Forest Green



    Bronze Vein

    Silver Vein

    Actual colors may vary, see your sales consultant for color samples.

  • Screen 123


    Standard Screen

    As the standard in the industry for years, this vinyl coated fiberglass screen material is sure to keep insects out.



    BetterVue insect screen is an improved visibility screen that offers clearer views (20%) with enhanced insect screen performance (10%). Additionally, BetterVue includes Microban antimicrobial product protection to stay clean longer and Water Shed TechnologyTM.



    PetScreen is tear and puncture-resistant to prevent damage by dogs and cats and is ideal for use in high-traffic areas. Additionally, PetScreen includes Microban antimicrobial product protection to stay clean longer and Water Shed TechnologyTM.


    Energy Efficient Coated Glass



    LoE-x89® is a neutral color exterior glass surface coating (indium tin oxide) which reduces outdoor glass condensation. LoE-x89® is designed to be used on surface #1 to reduce heat loss and the occurrence of the glass falling below the dew point. This reduces the opportunity for exterior condensation to occur. In addition, LoE-x89® has a titanium dioxide coating which keeps the exterior glass surface cleaner for a longer period.

    Safety Glass

    • Tempered safety glass and Plexiglass are available in lieu of standard annealed glass.

    Obscure Glass

    Oftentimes used in bathrooms, mud rooms, and utility areas, specialty glass provides different levels of privacy while still allowing light into a room.

    Stipolite (Pattern 62)


    Satin Etch

  • Hardware

    Latches and Corner Keys

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    PVC Hardware

    Standard on all Casco Storm Windows, PVC hardware and corner keys offer durability and price flexibility.

    Die Cast Metal Hardware

    Optional upgrade for increased durability and longevity. Double hung and picture window units include metal latches and corner keys as part of the upgrade. Slider windows include metal latches only with PVC corner keys due to the sliding nature of the window.

    Frame Stabilizer Bar

    Optional frame stabilizer bars on double-hung windows help ensure the frame is properly set up and supported for larger windows. Optional on all windows, but included by default on larger windows, a frame stabilizer is key to assisting a successful installation and increased durability and longevity in the window.

  • Types


    Two Track Double Hung

    With increased thermal and weather resistance, Casco's Two Track Double Hung Storm Window provides new life to old windows and enhanced performance to new windows. Each window includes a bottom venting glass panel and screen. Includes half screen on bottom of exterior track of window.

    (MAX SIZE: 52" x 88")


    Two Track Oriel Double Hung

    For cottage style homes, unequal glass panels may be required to match a home's exterior. Casco's Oriel Storm Window has the same features as the Two Track Double Hung with the added feature of matching unequal sashes existing in the home. Includes half screen on bottom of exterior track of window.

    (MAX SIZE: 52" x 88")


    Three Track Double Hung

    Similar to the Casco Two Track Double Hung, the Three Track Storm Window adds an additional track for the screen. This additional feature allows the screen to be active independent of the two glass panels. Includes half screen on interior track of window. Designed for bottom venting only.

    (MAX SIZE: 52" x 88")


    Two Track Slider

    Casco Two Track Sliding Storm Window gives any homeowner the added insulation they seek for old or new windows with adding another thermal barrier. Along with thermal improvement, weatherproofing is increased by keeping out driving rain and significant wind gusts. Product must be handed as only one of the two sash are active. Includes half screen on exterior track of window and handing is reversible.

    (MAX SIZE: 72" x 60")


    Three Track Slider

    Casco's Three Track Sliding Storm Window provides all the same benefits as the two track system with added features. Both panels of this window slide in either direction and two screens are provided to compose a full screen system that is removable from the interior. Includes two half screens and a mullion on exterior track of window (makes a full screen).

    (MAX SIZE: 72" x 60")


    Two Track Double End Slider

    Similar to the Casco Two Track Sliding Window, this Double End Slider adds a movable panel on both sides of a stationary picture window. Stationary screen included for both movable panels. Includes two flanker size matched screens on exterior track of window.

    (MAX SIZE: 120" x 60")


    Picture Storm Window / Basement Storm

    Complete your homes added thermal protection by adding this Picture Window Storm to your homes picture windows or basement windows for added thermal insulation. Each unit comes with a removable glass panel for easy cleaning. No screen included by default. Removable screen insert or screen rolled into the master frame available as an upcharge.

    (MAX SIZE - Single Unit: 50-1/2" x 93-1/2" -or- 93-1/2" x 50-1/2" | Larger sizes available with mullion included. Tempered glass required on units over 15 sq/ft.)

  • Mounting Style

    • Blind Stop Mount Frame: Storm window is mounted to the blind stop of the window. Frame used includes a 3/4" flange on the two track and a 1/2" flange on the three track and picture windows.

    • Overlap Mount Frame: Storm window is mounted to the exterior brickmold/trim of the window or exterior of the opening. Frame used includes a 1-1/4" flange for mounting to the window to allow for clearance of hardware. Available in all windows except picture windows.



    Casco dealers can receive window dimensions in two ways: either by providing the opening size or by specifying the exact tip-to-tip measurements of the window required. The "window opening" refers to the space either within which the window needs to fit (typical for blind stop mount style frames) or the area it needs to cover up (typical for overlap frame style). To determine the type of frame needed, please refer to the drawings below, which illustrate the two types of frames for clarification.

    Blind Stop Mount Frame

    • Opening Size (Width) - 1/8" = Tip to Tip Width of the Window
    • Opening Size (Height) -1/8" = Tip to Tip Height of the Window, Including the Sill Expander at Its Most Compressed Position

    Overlap Mount Frame

    • Opening Size (Width) + 1" = Tip to Tip Width of the Window
    • Opening Size (Height) + 1/2" = Tip to Tip Height of the Window, Including the Sill Expander at Its Most Compressed Position
    Note: If your window includes an expander, Casco will make the necessary adjustments to incorporate the expander into your overall provided dimensions. Customers should refrain from compensating for the expander themselves, unless unusual circumstances are involved.

    How to Measure

    Opening Width Measurement:

    • Measure the width of the window frame at three points: top, middle, and bottom.
    • Use the smallest measurement to avoid gaps.

    Opening Height Measurement:

    • Measure the height of the window frame at three points: left, center, and right.
    • Ensure accuracy and use the smallest measurement.

    Tip-to-Tip Frame Dimension (Optional):

    • Alternatively, customers can provide the tip-to-tip frame dimension.
    • Measure (or provide) the outermost tip of the flange for the width and the outermost dimension for the height.
    • Include from the top of the flange to the bottom of the sill expander.

    Sill Expander Options:

    • Note that there are two different sill expander options available: 7/8" and 1-1/2".
    • Choose the appropriate sill expander based on your window sill condition.


    • Ensure that all measurements are double-checked for accuracy before ordering or purchasing the storm window.
    • Adjust measurements accordingly if any irregularities in the frame are noted.
    • Providing either set of dimensions (opening or tip to tip) ensures a snug fit, offering both protection and aesthetic appeal.
    • Consider the height of the window sill to ensure compatibility with the chosen sill expander option.
  • Other

    Casco Storm Window Brochure
    Casco Storm Product Warranty (PDF)
    Casco Storm Window - Expander Chart

    Casco Storm Window Measure and Installation Reference Video