Storm Window Myths Busted – What They Actually Do (and Don’t Do)
Let’s bust some myths, shall we? Historic homeowners often hear conflicting advice about storm windows. Some think they ruin aesthetics, others think they don’t help at all. And some folks still believe that vinyl replacements are "better" (gasp). In this blog, we’re setting the record straight on storm windows—what they really do, what they don’t do, and why they’re one of the smartest investments you can make in your historic home.
Myth #1: "Storm windows ruin the look of your house."
False. When custom-made and properly installed, storm windows are nearly invisible—especially interior storms or exterior storms with a low-profile frame painted to match your trim.
At Austin Historical, we design storms that follow the lines of your existing sash. You keep your historic charm and gain modern performance. In fact, many preservation boards approve well-designed storms because they protect original materials while maintaining appearance. We call them Austin Shields.
Myth #2: "Storm windows don’t actually help with insulation."
Also false. Studies (and our field experience) show that adding a properly sealed storm window to a single-pane window can cut heat loss by up to 50%.
Storm windows act as a second barrier:
Trapping a pocket of air between the panes
Blocking drafts and air infiltration
Reducing radiant heat loss in winter
Lowering solar heat gain in summer
Pair them with weatherstripping and you’ve got performance that rivals modern double-pane windows — without removing a single historic element. Want to learn all about the energy efficiency of historic windows? Read this book: The Case for Historic Windows.
Myth #3: "Storm windows trap moisture and cause rot."
Only if they’re installed poorly.
Properly installed storm windows must include:
Weep holes for drainage
Ventilation space to avoid condensation buildup
Seasonal removal options if needed (especially for wood storms)
The key is breathability and fit. At Austin Historical, we ensure your original windows are fully restored and prepped before we install any storms.
Myth #4: "All storm windows are the same."
Not even close.
Let’s break down your options:
Interior Storms: Ideal for strict historic districts or homes where exterior storms are prohibited. Often magnetic, compression-fit, or hinged. Virtually invisible. We recommend a compression-fit for historic homeowners called Indows®.
Exterior Storms: Most common, available in aluminum or wood. Can be fixed, operable, or removable.
Wood-Framed Storms: Best for visual match. Require more upkeep but blend perfectly.
Low-E Glass Options: Reflect heat and UV rays. Great for hot climates or sun-facing elevations.
Laminated Glass Options: Provide added security and even hurricane protection.
Myth #5: "Storm windows are a hassle to install."
Wrong again. With a professional installation team, it’s a simple, non-invasive process. Most installs take under 1 hour per window.
Bonus: Since we’re not removing your original windows, there’s less dust, noise, and disruption. And because storm windows are custom-fit to each opening, there’s no clunky cutting or patching involved.
Bonus Benefits You Might Not Know
Noise Reduction: Sleep better and enjoy a quieter home
Glass Protection: Acts as a shield for fragile antique glass
Tax Credits: May qualify for preservation or energy efficiency incentives
Security: Laminated or tempered options resist break-ins
Insurance Discounts: Especially in wind or coastal zones
So, What Don’t They Do?
Storm windows are amazing, but they’re not magic. Here’s what they don’t do:
Replace the need for good primary sash maintenance
Fix water damage or rot in your original windows
Work well if you buy the wrong size from a box store (custom only, please)
Final Word
Storm windows aren’t a compromise—they’re a clever upgrade. They let you enjoy the look and feel of your historic windows while staying warm, quiet, and energy-efficient. So the next time someone tells you storm windows are ugly or pointless, you’ll know the truth: They’re your historic home’s best-kept secret.
