Window Repair and Glass Replacement for Historic Homes

Historic windows are an essential part of your home's character and value. Original windows in Georgetown, Capitol Hill, Old Town Alexandria, and other historic DMV neighborhoods contribute significantly to architectural integrity.

Many historic districts have preservation guidelines that require maintaining or restoring original windows rather than replacing them with modern alternatives. Understanding these requirements is essential before beginning any window work.

Historic window restoration often involves repairing wood frames, replacing sash cords, re-glazing glass, and adding weatherstripping. These repairs can extend the life of original windows by decades.

When glass replacement is necessary in historic windows, period-appropriate options include restoration glass with slight imperfections that match the look of original handmade glass.

For improved energy efficiency without changing appearance, interior storm windows can be added behind historic windows. This preserves the exterior look while providing modern insulation.

Some historic preservation boards allow thin-profile insulated glass units that fit in original sash dimensions. These provide modern performance while maintaining the historic exterior appearance.

Before any window work on a historic property, check with your local historic preservation board. In DC, this is the Historic Preservation Office. In Virginia and Maryland, check county or city preservation offices.

Document existing windows with photos before any work begins. Preservation boards often require before-and-after documentation.

Work with a glass company experienced in historic restoration. Not all glass companies understand the specific requirements and sensitivities of working on historic properties.