Original old-growth wood windows can last centuries when properly restored. Repair weight-and-pulley sashes and meet historic commission standards.
Historic windows were crafted from dense, rot-resistant old-growth timber that is virtually impossible to replace with modern fast-grown lumber. Vinyl replacement windows typically fail within 10 to 15 years, cannot be repaired, and degrade the architectural character and appraisal value of historic homes. Furthermore, the Philadelphia Historical Commission and regional preservation districts strictly prohibit unapproved replacement inserts. Specialized window restorers rebuild original sash joinery, replace broken cords and chains, re-glaze glass with linseed oil putty, and integrate custom wood storm windows for modern thermal efficiency.
WMG Historic Restoration specializes in the comprehensive restoration, repair, and weatherproofing of historic wood and steel windows and architectural doors throughout the Mid-Atlantic region.
Iconic Windows is a dedicated historic window restoration practice in Philadelphia, helping homeowners preserve original wood sashes while achieving airtight energy performance with custom storm windows.
Forever Hung focuses exclusively on restoring residential double-hung wood windows in Philadelphia's historic neighborhoods. They emphasize sustainable preservation over replacement.
Penn's Millwork & Historic Window Restoration specializes in preserving, repairing, and rebuilding traditional wood windows, sashes, and architectural millwork across Bucks County and the Greater Philadelphia region.
Window Repairs & Restoration, LLC focuses on repairing, rebuilding, and weatherproofing historic double-hung, casement, and pivot wood windows across the Philadelphia metropolitan area. Dedicated to the principle that original old-growth wood windows can last indefinitely when properly maintained, their craftsmen strip existing lead paint, stabilize rot with architectural conservation epoxies, and hand-bed historical wavy glass.
Graboyes Commercial is a premier commercial glazing and window firm with extensive experience executing large-scale historic window rehabilitation projects. They work closely with preservation consultants, architects, and the National Park Service to satisfy Secretary of the Interior Standards for Rehabilitation, providing custom-profiled wood and thermally improved steel replica windows for adaptive reuse projects.
Architectural Window Corporation operates a full-service custom architectural millwork shop in Philadelphia dedicated to historic window and door fabrication and restoration. Their work adheres directly to local historic commission guidelines, replicating intricate period molding details, narrow muntin profiles, and authentic weight-balanced double-hung operations for pre-1940 structures.
Stepp's Restoration Shop brings master craftsmanship to the conservation of antique windows and entry doors dating from the 1700s through early 1900s. Operating from the historic Oley Valley and serving Chester, Montgomery, and Philadelphia counties, the shop specializes in preserving original fabric through wood consolidants, hand-blown glass installation, and traditional bronze weatherstripping.
AP Lohmann General Contracting specializes in historic carpentry and building preservation in Chester County and the Main Line. Their window division provides comprehensive restoration for deteriorating wood sash, removing failed modern paints, repairing dry-rotted tenons with heartwood timber, and building custom exterior wood storm sash that preserve architectural authenticity while enhancing thermal efficiency.
Cooper O'Neil Stained Glass & Window Restoration is an award-winning studio honored by the Preservation Alliance for Greater Philadelphia. Specializing in the delicate intersection of historic woodworking and leaded art glass, their studio expertly re-leads sagging lead cames, restores historic wood window frames, and installs ventilated conservation glazing.
Located in Philadelphia's historic Northwest (Germantown/Mount Airy), Hanson Fine Building has been a regional leader in preservation carpentry and sustainable historic building performance since 1986. Their craft team treats original architectural woodwork as non-renewable cultural resources, restoring original wood sash, frames, and ornate entrance portals with meticulous attention to historic details.
Traditional Woodworking LLC operates an authentic architectural millwork and restoration workshop in Bucks County, reproducing exact historic profiles for period windows, casings, entrance systems, and raised-panel exterior doors. Working from architectural drawings or deteriorated historic samples, their artisans match original wood species, joinery, and profiles.