Allied Window's HOL-B Historic-One-Lite exterior storm windows were installed on the 4th and Plum building in Cincinnati, OH.  Click here for company info.

Allied Window manufactured a storm window for this round-top window. Click here for company info.

Allied Window manufactured this custom-colored Magnetic One Lite storm window for a residence in Cincinnati, OH. Click here for company info.

Allied Window designed and fabricated the bowed storm windows for this historic home. Click here for company info.

This window features the Historic-One-Lite invisible storm from Allied Window; all of the company's windows are custom made.  Click here for company info.

Arch Angle provided the storm windows and doors for this residence. Click here for company info.

Architectural Components restored the windows for the Jacob Whittemore House at the Minuteman National Historic Park in Lexington, MA; they feature one-in. muntin bars with ovolo profile. Click here for company info.

Architectural Components supplied the custom true-divided-lite wood windows and doors for this Shingle Style home. Click here for company info.

This reproduction 12/12 window with fan was fabricated by Architectural Components.  Click here for company info.

Architectural Iron offers stock cast-iron window weights and custom weights in cast lead and cast iron.  Click here for company info.

Bronze and brass hardware, including this window lockset, is available from Architectural Resource Center. Click here for company info.

Architectural Resource Center offers a selection of sash pulleys, sash lifts and locks and sash chain and rope. Click here for company info.

Sash pulleys from Architectural Resource Center are available in cast brass or bronze in a range of sizes and finishes. Click here for company info.

This double-hung window unit with a fixed-arch fan sash was constructed with mortise-and-tenon joinery by Artistic Doors & Windows. Click here for company info.

This cast-brass sash lift from Ball & Ball measures 2x1 in. Click here for company info.

The subtle imperfections and distortions of Restoration Glass from Bendheim create historically accurate detailing in traditional homes. Click here for company info.

Mouth-blown window glass from Bendheim Glass Co. was used for the restoration of the White House, Mount Vernon and Monticello. Click here for company info.

Five units of style #6 from Cityproof Windows form a bay section; the windows are designed to reduce noise and eliminate dirt infiltration and drafts. Click here for company info.

Interior storm windows from Cityproof Windows are designed to reduce noise infiltration. Click here for company info.

An interior storm from Climate Seal provides insulation while protecting the appearance of this historic window. Click here for company info.

Many styles of wood screen doors manufactured by Coppa Woodworking are available painted or stained. Click here for company info.

Crown City manufactured these stainless-steel casement fasteners, from left to right, models #82A-L, MS and RS. Click here for company info.

This Boston window lock was fabricated by Crown City Hardware. Click here for company info.

This wood window was designed and manufactured by Fenestra.  Click here for company info.

The wood windows of this residence were manufactured by Fenestra America. Click here for company info.

Glass House custom fabricated this mahogany hip-corner skylight with matching windows to create a library window seat. Click here for company info.

This traditional roof lantern was custom fabricated by Glass House. Click here for company info.

Grabill Windows & Doors specializes in custom wood windows, such as this mahogany awning window with stainless-steel hardware. Click here for company info.

The doors and windows of this house were manufactured by Grabill Windows & Doors. Click here for company info.

Eco-Choice windows from Grabill meet LEED criteria. Click here for company info.

Grabill restored the windows of the Sarah Jordan boarding house in Greenfield Village, MI. Click here for company info.

This custom bronze-clad tilt-and-turn window was fabricated by Grabill; it has an antiqued patina and an aged-wood interior. Click here for company info.

Grabill fabricated these fixed and operable mahogany casement windows and fixed transom units. Click here for company info.

These traditional mortise-and-tenon wood storm windows were designed and built by GreenWood Workshop. Click here for company info.

Sash locks from Harwick Architecural Hardware are forged in solid brass and feature stainless-steel springs. Click here for company info.

This Palladian window was crafted by HeartWood Fine Windows & Doors in Honduras mahogany.  Click here for company info.

This 11-ft. custom bronze door was manufactured by Historical Arts & Casting with a patina formulated to age gracefully in any climate. Click here for company info.

Historical Arts & Casting fabricated this 11-ft.-dia. skylight in bronze. Click here for company info.

This cast-bronze window from Historical Arts & Casting, model #DW027, comes in two sizes, 4 ft.-4╜ in. x 3 ft. and 2 ft.-10╜ in. x 2╜ ft. Click here for company info.

A craftsman assembles a 3x5-ft. bronze window in the Historical Arts & Casting studio. Click here for company info.

Innerglass Window Systems created this custom interior storm window, which is designed to eliminate drafts and reduce sound infiltration. Click here for company info.

Glass interior storm windows from Innerglass complement historic windows. Click here for company info.

This hand-forged fleur-de-lis window grill was fabricated by Kayne & Son.  Click here for company info.

This window grille was custom made by Kayne & Son. Click here for company info.

This weight-and-pulley double-hung window from Kolbe & Kolbe is available in pine, oak, cherry and mahogany. Click here for company info.

Arched-top double-hung windows from Kolbe & Kolbe can be installed without removing existing trim and framework. Click here for company info.

Kolbe & Kolbe's Ultra Pocket Double Hung is an all-in-one replacement window unit.  Click here for company info.

Loewen’s Douglas fir double-hung windows complement the Georgian style of this home. Click here for company info.

Maguire Iron’s model #1084 casement stay is 12 in. long. Click here for company info.

All-wood interior and exterior insert double-hung windows are offered by Marvin. Click here for company info.

Marvin Windows and Doors’ Ultimate Double Hung wood windows are available in a variety of configurations. Click here for company info.

The wood Magnum Double-Hung window from Marvin Windows and Doors is designed for large openings and places where an abundance of light is desired. Click here for company info.

Designed for superior performance against air, water and structural infiltration, Ultimate Double Hung Mangum Round Top windows are available from Marvin in a variety of large sizes and shapes. Click here for company info.

Windows from Marvin Windows and Doors are available in a variety of large sizes and shapes; many have U-factors below 0.25.  Click here for company info.

This pine window was manufactured by Maurer & Shepherd to reproduce an historic style. Click here for company info.

Mon-Ray's aluminum and storm windows can be used in restoration and new construction projects. Click here for company info.

Mon-Ray manufactures high-performance storm windows and doors for both exterior and interior historical applications. Click here for company info.

New England Skylights fabricated and installed this traditional gable end copper frame skylight for a residence in the historic district of Newport, RI. Click here for company info.

This double-tiered glass lantern roof by Oak Leaf Conservatories crowns the orangery addition to a century-old Greek Revival house. Click here for company info.

These hand-forged window pins from Old Smithy Shop are used to secure upper and lower sections of windows together. Click here for company info.

Parrett Mfg. fabricates custom windows in non-standard sizes and shapes, such as this divided-lite Palladian model. Click here for company info.

These round-top windows were custom manufactured by Parrett Windows.  Click here for company info.

Parrett Windows & Doors offers custom grille bar styles and patterns. Click here for company info.

Parrett Windows & Doors offers a wide selection of historical windows. Click here for company info.

Parrett Windows & Doors offers a variety of historical windows. Click here for company info.

Parrett Windows & Doors replicated the historical sash windows for the Dallas County Courthouse in Adel, IA. Click here for company info.

Fixed windows with removable grills are available from Parrett Windows & Doors with simulated divided lights (shown here) or true divided lights. Click here for company info.

Phelps Company specializes in traditional brass hardware such as sash pulleys, sash locks and lifts, sash weights and traditional casement window hardware. Click here for company info.

The model #LKF18 sash lock from Phelps Company is hot forged from solid brass and hand finished; the internal double-spring mechanism is made of stainless steel. Click here for company info.

The model #CSB34 casement stay from Phelps Company, shown here with an oil-rubbed bronze finish, can be used on both in-swing and out-swing casement windows.  Click here for company info.

This casement stay was manufactured by Phelps in polished brass. Click here for company info.

The model #LF23 sash lift from Phelps is hot forged from solid brass and hand polished.  Click here for company info.

The new model LK281 sash lock from the Phelps Company is made of solid hot-forged brass. Click here for company info.

Pullman balances were used in these pre-existing pulley/weight slots. Click here for company info.

Reilly Windows & Doors manufactured and installed these windows.  Click here for company info.

Windows and doors in all wood species are available from Reilly Windows & Doors. Click here for company info.

This two-story conservatory in Rochester, NY, built by Renaissance Conservatories, features a copper roof with a glass lantern. Click here for company info.

Renaissance Conservatories fabricates custom skylights and conservatories.  Click here for company info.

This leaded-glass panel was restored by Rohlf's for a New York City townhouse. Click here for company info.

This damaged window was rebuilt by Seekircher Steel Window Repair. Click here for company info.

Seekircher Steel Window Repair restored these original steel windows for a project in Corbett, OR. Click here for company info.

Seekircher, a specialist in steel casement-window adjustment and restoration, rebuilt this window after it was damaged in a storm. Click here for company info.

This vintage 1930s steel window was restored by Seekircher.  Click here for company info.

These 75-year-old steel casement windows were salvaged and then incorporated into this structure by Seekircher Steel Window Repair. Click here for company info.

This solid-bronze sash lock is available from Signature Hardware. Click here for company info.

This English Tudor estate had its old decayed steel windows replaced with modern Designline 90 windows from Skyline Windows. Click here for company info.

Solar Innovations' product line includes skylights in variety of styles. Click here for company info.

This dome skylight from Solar Innovations utilizes one-in. insulted glass and solid copper and bronze panels. Click here for company info.

These wood windows were manufactured by Custom Trades International. Click here for company info.

Steel Windows & Doors supplied these W20 series hot-rolled steel windows by Crittall Windows.  Click here for company info.

Hot rolled steel windows and doors are the specialty of Steel Windows & Doors. Click here for company info.

Tanglewood pre-assembles conservatories, some of which feature skylights, in their Maryland workshop. Click here for company info.

Tanglewood Conservatories provided the skylights used in this pool enclosure.  Click here for company info.

The Nanz Company offers knobs, levers and knuckle hinges in cast brass or bronze. Click here for company info.

This sampling of authentic period-style residential door and window hardware was designed and manufactured by Nanz. Click here for company info.

The olive knuckle hinge, model #3003 from Nanz, is fashioned after a design manufactured in Connecticut during the early-20th century and is sandcast in brass. Click here for company info.

Town & Country Conservatories custom designed and fabricated the skylights in this home. Click here for company info.

Vintage Woodworks designs and manufactures screen and storm doors with or without spandrels.  Click here for company info.

Replacement windows from Weather Shield Mfg. Co. include the HR175 line. Click here for company info.

Weston Millwork replicated this Diamond Light double-hung window for the 1909 Jake Callen House, Junction City, KS. Click here for company info.

Weston Millwork uses mortise-and-tenon joinery for sash construction.  Click here for company info.

This pine window screen was fabricated by Weston Millwork. Click here for company info.

WindowRepair.com specializes in the restoration of historic double-hung wood windows. Click here for company info.

This arched-casement Honduras mahogany window was manufactured by Wood Window Workshop. Click here for company info.

Wood Window Workshop custom fabricated this circular window with four-leaf-clover panes. Click here for company info.

Woodstone custom fabricated this Palladian-style wood window. Click here for company info.

These mulled, bowed, double-hung, mahogany windows were restored by Woodstone Co. Click here for company info.

Zeluck Doors & Windows specializes in high-end custom wood windows, like these European arched models. Click here for company info.