Restoration vs. Replacement
The case for restoration — and why the most expensive decision you can make is replacing original windows you don't have to.
The Foundation
Most homeowners are told their only option is replacement. That's almost never true — and it's almost always the worse choice for a historic home.
Source: National Trust for Historic Preservation
Pre-1940s wood windows were milled from old-growth timber — dense, tight-grained wood with a natural rot resistance that modern lumber cannot replicate. Properly maintained, they outlast any vinyl or composite replacement.
Source: Barron Restorations professional assessment
Every replacement window creates manufacturing waste and fills landfills with your original windows — materials that took centuries to grow. Restoration preserves the embodied energy and materials already in your home.
Source: Window & Door Manufacturers Association
Modern replacement windows fail in 15–20 years. Your original windows, properly restored, can last indefinitely. Over a 50-year horizon, restoration is almost always the lower-cost choice by a significant margin.
Side by Side
Common Questions
Most draft comes from failed weatherstripping and deteriorated glazing — both fixed in a standard restoration. When paired with Indow interior storm inserts, restored original windows match or exceed the energy performance of modern replacements.
On a window-by-window basis, quality restoration is often comparable to or less than quality replacement — and with an indefinite lifespan versus 15–20 years, the long-term math strongly favors restoration.
In our experience, fewer than 10% of "hopeless" windows actually require full replacement. Most rot is surface-level and can be addressed with commercial-grade epoxy patching at a fraction of replacement cost. Get a second opinion before you replace.
Modern replacement windows are manufactured from fast-grown softwood lumber with open grain that absorbs moisture and fails within a generation. Original old-growth windows, properly maintained, have already proven they can last centuries.
Industry Resources
For independent research on historic window restoration, we recommend the Window Preservation Alliance — the national industry organization dedicated to the preservation of historic windows.
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