Storm Window Replacement
If your storm windows are showing their age — cracked glazing, stuck hardware, bent frames — you don't have to live with drafts or poor visibility. Replacing storm windows is straightforward when you order the right size. This guide covers what to look for, how to measure, and how to get custom-sized replacements that actually fit.
Signs It's Time to Replace Your Storm Windows
Storm windows are built to last, but no unit lasts forever. If you notice any of the following, replacement is likely the right call rather than patching or re-weatherstripping:
Broken or cracked glazing
Cracked glass compromises insulation and is a safety hazard. Replacement is usually safer and less expensive than reglazine.
Failed weatherstripping
If the rubber or felt seal around the frame has hardened, torn, or compressed flat, you'll feel drafts even with the window fully closed.
Bent or corroded frames
Aluminum frames that are bent or heavily pitted can no longer seal flat against the primary window, making drafts unavoidable.
Fogged or cloudy glass
Persistent internal condensation or fogging that won't wipe off means moisture has entered the unit and the seal has failed.
Hardware failure
Latches, lift rails, or tilt mechanisms that no longer function make the window difficult to operate seasonally and reduce its effectiveness.
Gaps around the frame
A storm window that no longer sits flush against the primary window frame — even when fully closed — is no longer doing its job.
What to Know Before You Order
Replacement storm windows are not a buy-off-the-shelf situation for most homes. Before placing an order, there are a few things worth confirming.
Measure the opening, not the existing window
Your replacement needs to fit the window jamb opening — the space between the side jambs and between the sill and head jamb. Do not trace the dimensions of the old storm window itself, since it may have been slightly undersized or cut down to fit improperly.
Match the frame color
If you are replacing only some of your storm windows, confirm the finish of your remaining units. Mill finish, white, bronze, and black are the most common options. A color mismatch on one window is noticeable from the street.
Decide on configuration
This is your opportunity to upgrade if your existing windows were fixed or single-track units. A two-track or triple-track combination window adds screen ventilation for summer use. See our two-track vs. triple-track guide for a direct comparison.
The Replacement Process
- 01
Measure your opening
Width in three places and height in three places. Record the smallest measurement for each dimension to ensure the replacement fits within the jamb.
- 02
Choose your configuration and finish
Select fixed, two-track, or triple-track. Choose a frame color that matches your existing windows or primary window frames.
- 03
Order custom
Enter your exact measurements. Your replacement is fabricated to those dimensions — not cut down from a larger stock unit.
- 04
Receive and install
Your window arrives fully assembled with hardware. Remove the old unit, install the new one in the same mounting clips or drill new pilot holes, and you're done.
Why Custom-Sized Replacements Outperform Standard Sizes
Most homes do not have windows that match standard industry sizing. Even homes built with standard rough openings end up with openings that vary by a quarter-inch or more once trim, paint buildup, and settled framing are factored in. A "standard" replacement that is even slightly too small will sit loose in the opening, leaving gaps at the edges where drafts come through and moisture can enter.
Custom-fabricated replacement storm windows are built to your exact measurements, so they sit flat in the opening and seal properly against the jambs. This is especially important if you have older windows where the rough opening has shifted over decades of seasonal expansion and contraction.
Frequently Asked Questions
Can I replace just one panel instead of the whole storm window?
In some cases, individual glass or screen panels can be replaced if the frame is in good condition. If the frame is bent, corroded, or warped, replacing the full unit is usually the better call — a damaged frame prevents proper sealing no matter how good the new panel is.
How do I measure for replacement storm windows?
Measure the window opening (jamb to jamb), not the glass or the old storm window itself. Take three width measurements and three height measurements, then use the smallest number for each. This ensures the replacement fits without forcing.
How long does shipping take?
Custom fabrication takes 5–10 business days. Standard ground shipping adds 3–7 business days depending on your location. Tracking is provided when the order ships.
Can I replace with a different configuration than what I have now?
Yes. You can switch from a fixed panel to a two-track or triple-track combination unit. Just confirm the frame depth your opening can accommodate before choosing a thicker configuration.
Do replacement storm windows come pre-assembled?
Yes. Units arrive fully assembled with hardware included. Installation typically takes 15–30 minutes per window.
Order Your Replacement Storm Windows
Custom-sized to your exact opening. Fabricated in the US and shipped nationwide. No contractor required — most installs take under 30 minutes per window.