01
Original window evaluation
We assess the condition of the existing window — operable, weather-tight, structurally sound? If it's failing, storm windows won't fix it. Sometimes we'll recommend replacement instead.
Storm windows that improve insulation and protect single-pane or historic windows without replacing them. Interior and exterior options, custom-sized to the opening.
Storm windows used to be the standard upgrade for older homes. Modern energy-efficient replacements have largely taken over, but for homes with windows worth preserving — historic mullions, original wavy glass, custom shapes — a properly installed storm window can dramatically improve insulation without sacrificing what makes the original special.
Interior storms (removable acrylic panels) protect the visible character of the original window from the outside. Exterior storms (full aluminum or composite frames) take more of the weather hit and last longer. We'll walk through both with you and recommend based on the window, the architecture, and how you use the room.
Every project quote is itemized. Here's what tends to be in scope on a typical project.
We assess the condition of the existing window — operable, weather-tight, structurally sound? If it's failing, storm windows won't fix it. Sometimes we'll recommend replacement instead.
Interior or exterior, based on the home, the climate exposure, and the look you want. Interior storms are nearly invisible from outside; exterior storms protect more aggressively.
Storm windows for older homes almost never fit stock sizes. We measure each opening individually and order to actual dimensions.
Existing frame is cleaned, sealed, and any rot or damage addressed. Storm window frame is mounted with proper flashing and sealant for Minnesota weather.
Latches, slides, and removable screens installed and tested. We confirm the storm window operates smoothly across seasons.
Storm windows only insulate if they seal against the primary frame. We apply weatherstripping where needed and verify the seal before we leave.
For most modern homes with quality double-pane windows, no — the marginal improvement isn't worth the cost. For older homes with single-pane windows you don't want to replace (historic, decorative, or unusually shaped), storm windows are still the right call. They can cut heat loss through the window by 25–50%.
Interior storms are less visible from the street and protect the original window from interior moisture. Exterior storms take more of the weather hit and add more insulation overall. For historic homes where preserving the exterior look matters, interior storms are usually the answer. For pure energy and durability, exterior.
Generally no — modern energy-efficient replacement windows perform similarly to a single-pane plus storm combination, and adding storms to replacements creates more problems than it solves (trapped moisture, condensation between layers). We don't typically recommend storm windows for homes with modern double-pane glass.
Aluminum-framed storm windows typically last 25–30 years; composite frames longer. The glass itself usually outlasts the frame. Replacement is straightforward when the time comes — the framing remains, just the window unit changes out.
A few details now and we can have a written estimate scheduled for next week. We respond to inquiries within one business day.
Complete the form and we’ll be in touch within one business day.