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| Your Guide to Exterior Storm Windows |
Introduction
If you’re looking for a budget-friendly way to upgrade your home’s insulation and safeguard your existing windows, exterior storm windows might be the answer. These secondary window systems sit on the outside of your current windows, reducing drafts, cutting energy costs, and even cutting down on noise. In this guide, we break down everything you need to know about exterior storm windows—from what they are and how they work to practical installation and maintenance tips that you can apply today.
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What Are Exterior Storm Windows?
Exterior storm windows are additional window panels that attach over your primary windows. They serve as an extra layer of protection against harsh weather conditions such as wind, rain, and snow, while also adding an extra barrier against heat loss. Unlike full window replacements, storm windows allow you to keep your classic windows intact while boosting their insulation performance.
- Secondary Glazing: The extra pane creates a trapped air space that acts as insulation.
- Low-E Options: Many models include low-emissivity (Low-E) glass, which reflects heat back inside during winter and keeps your home cooler in summer.
- Versatile Mounting: They can be permanently installed or removed seasonally, depending on your needs.
Benefits of Exterior Storm Windows
Energy Savings
- Reduced Heat Loss: By adding an extra layer of insulation, storm windows cut down on heat escaping through your windows in winter. In many cases, homeowners can see reductions in heating bills of up to 10–30%.
- Lower Cooling Costs: In warmer months, Low-E storm windows reflect unwanted heat, keeping your home cooler and reducing the load on air conditioning systems.
Improved Comfort
- Draft Reduction: Storm windows minimize cold drafts around your windows, ensuring that your indoor temperature stays steady even on chilly days.
- Enhanced Thermal Performance: The trapped air space acts as a buffer between the inside and outside, helping maintain a consistent temperature.
Protection for Existing Windows
- Preservation: Installing exterior storm windows can extend the life of your original windows by shielding them from extreme weather and UV damage.
- Maintenance Savings: With reduced exposure to the elements, your primary windows require less frequent repairs or replacement.
Noise Reduction
- Soundproofing: The additional glass layer can help dampen external noise, creating a quieter indoor environment. This is particularly beneficial if you live near busy streets or noisy neighborhoods.
Added Security
- Extra Barrier: The additional layer of glass adds an element of security by making it more difficult for intruders to break in.
Choosing the Right Exterior Storm Windows
Material Options
- Aluminum Frames:
Aluminum storm windows are popular because they are durable, low maintenance, and relatively affordable. They often feature enamel-coated finishes that resist corrosion and come in various colors to match your home’s exterior.
- Wood Frames:
For a classic look, wood-framed storm windows offer natural warmth and can be stained or painted to match historic homes. Note that wood may require more regular upkeep.
- Vinyl Frames:
Vinyl options offer good energy efficiency and require minimal maintenance. They can be a cost-effective solution, though they may not provide the same traditional appeal as wood.
Glass Options
- Standard vs. Low‑E Glass:
Standard glass provides basic protection and insulation, but low‑e glass can improve energy performance by reflecting heat back into your home during winter. When searching for your next exterior storm windows, look for models that include Low-E coatings to maximize savings.
Mounting and Operation
- Fixed or Operable Designs:
Some storm windows are permanently installed, while others offer operable sections for ventilation. Fixed units generally provide a tighter seal and improved insulation, whereas operable designs allow you to open the window on milder days.
- Installation Method:
Consider whether you prefer a DIY-friendly option or a professional installation. Many storm windows are designed for easy self-installation, but if you’re unsure, consulting a professional might be a safer choice.
Installation and Maintenance Tips
Installation Guidelines
- Measure Accurately:
- Take measurements of your existing window from several points (top, middle, and bottom) to ensure a proper fit.
- Use the smallest measurement as your guide to avoid gaps that could allow drafts.
- Prepare the Surface:
- Clean the window frame thoroughly to remove dirt, old caulk, and debris.
- Repair any damage to the window trim before installation.
- Positioning and Sealing:
- Center the storm window over your primary window.
- Apply a high-quality caulk (avoid silicone if you plan to paint) along the top and sides to create a weatherproof seal while leaving the bottom open for drainage.
- Tip: Use painter’s caulk on surfaces that will be painted for a smoother finish.
- Secure the Unit:
- Follow the manufacturer’s instructions for fastening the storm window. This may include screws, clips, or other hardware designed to hold the window firmly in place.
- Double-check that the window is level and square before fully tightening the fasteners.
Maintenance Tips
- Regular Cleaning:
Clean both the interior and exterior surfaces of your storm windows to remove dirt, bird droppings, and other debris. Use mild soap and water to avoid damaging the glass or frame.
- Inspect Seals:
Periodically check the caulk and weatherstripping around the window for cracks or gaps. Replace or repair these areas as needed to maintain a tight seal.
- Check for Condensation:
While condensation can be a natural occurrence, excess moisture may indicate a problem with the seal. Address any persistent issues promptly to prevent mold or rot.
- Lubricate Moving Parts:
If your storm window has operable components, use a silicone spray (or manufacturer-recommended lubricant) on the tracks and hinges to ensure smooth operation.
Real-Life Examples and Case Studies
- Energy Savings:
A study by the U.S. Department of Energy shows that installing storm windows on single-pane homes can reduce energy use by up to 10–30%. Homeowners have reported noticeable decreases in their heating bills during winter.
- Improved Comfort:
In several retrofit projects, families have enjoyed warmer interiors and a significant reduction in cold drafts after installing storm windows. This extra layer helps maintain a more consistent indoor temperature even during severe weather.
- Extended Window Life:
In historic homes, exterior storm windows have been credited with protecting original wooden windows from moisture and UV damage. This protection not only preserves the architectural character of the home but also delays the need for costly window replacements.
- Noise Reduction:
In urban areas, storm windows have proven effective at lowering external noise. Homeowners living near busy streets or in high-traffic neighborhoods have found their living spaces to be much quieter with the additional glass layer.
Additional Tips for Maximizing Your Investment
- Pair with Window Treatments:
Use thermal curtains or cellular blinds to further reduce heat loss. These treatments work in tandem with storm windows to create a well-insulated environment.
- Regular Maintenance Schedule:
Set a reminder to inspect your storm windows every six months. This will help you catch any potential issues early and keep the windows in top condition.
- Customize to Your Home’s Style:
Choose storm windows that match your home’s exterior. Many manufacturers offer customizable color options and slim designs that blend seamlessly with your existing windows.
- Monitor Energy Bills:
Keep track of your utility bills before and after installation. This data can help you gauge the performance of your storm windows and determine if further adjustments are needed.
Conclusion
Exterior storm windows offer a practical solution for homeowners who want to improve energy efficiency without replacing their beloved original windows. They are a cost-effective way to reduce drafts, lower utility bills, and protect your home’s architectural charm. By following the installation and maintenance tips outlined in this guide, you can maximize your investment and enjoy a more comfortable living environment year-round.
Frequently Asked Questions
Do storm windows add insulation?
Yes. Exterior storm windows add a layer of insulation by creating a still, dead-air space between the existing window and the storm window. This extra barrier helps slow heat loss in winter and keeps unwanted heat out in summer.
Why do old houses have storm windows?
Older homes often feature storm windows because, in the past, they were the most affordable way to boost energy efficiency before modern double-glazing became widespread. Storm windows also protect the original windows from weather damage while preserving the home’s historic character.
Should I leave storm windows in during the summer?
It depends on your cooling strategy. In homes with air conditioning, leaving exterior storm windows in place can help keep cool air inside and lower energy costs. However, if you rely on natural ventilation, you might prefer to remove them during warmer months for better airflow.
