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Remodeling 101: Steel Factory-Style Windows and Doors


Remodeling 101: Steel Factory-Style Windows and Doors

May 11, 2017

Steel frame windows and doors: The aesthetic harkens back to the greenhouses, factories, and warehouses of the 19th century. And their elegant, narrow sight lines offer unobstructed views, blurring the boundaries between indoors and out. What’s not to like? They’re expensive, for starters.

Read on for everything you need to know about steel factory windows and doors.

in a house united: reimagining a brooklyn brownstone, a two story wall of  17
Above: In A House United: Reimagining a Brooklyn Brownstone, a two-story wall of steel frame windows blurs the boundary between indoors and out.

What are the benefits of steel frame windows and doors?

  • Due to the material’s strength, steel windows have very slender sight lines. A minimal amount of framing material is needed for structural integrity, offering clean and clear views.
  • Steel frame windows span architectural styles, working well in both traditional and modern houses.
  • All corners and joints of steel windows are welded, galvanized, and powder-coated, forming an unbroken surface around the frame.
  • Extremely durable, steel frames are resistant to decay, weather, and fire. They are galvanized (coated with a layer of zinc at very high temperatures) to prevent corrosion.
  • Unlike wood, steel window frames do not contract and expand in response to weather conditions.
  • They require minimal upkeep, compared with wood windows and doors.
custom steel frame doors from the atelier domingue architectural metalcrafts&#x 18
Above: Custom steel frame doors from the Atelier Domingue Architectural Metalcrafts line.

The framing around industrial-style steel doors can be pencil thin (unlike wood, which requires a large beam to support a door). Requiring minimal framework, steel windows are a great solution for open corner windows.

an interior steel frame door adds industrial structure to an all white bat 19
Above: An interior steel frame door adds industrial structure to an all-white bathroom; see Bathroom of the Week: Steel-Frame Shower Doors in a Fanciful London Project.

Are steel frame windows energy-efficient?

The bottom line is that metal is a poor insulator, and the thin steel and single-sheet steel factory windows of the past did little to keep out the cold. The good news is that 21st-century technology has caught up, and you can get the same historic looks with better materials and thermal efficiency.

Steel windows are available with insulated glazing panels; two or more pieces of glass are spaced apart and sealed, leaving an insulating air space. Another new technology called thermal breaks (whereby a material is placed between the inside and outside window frames to prevent thermal energy loss), common in aluminum windows, is available in steel windows. Steel fabricators will point out that steel itself has good insulating properties as compared to aluminum and thermal breaks may not be necessary. In fact, there are steel frame windows that meet LEED standards. Refer to fabricators’ websites for details.

Another consideration is that many fabricators roll their steel windows from 100 percent recycled steel. And the new product can also be recycled at the end of its long life.

Like any window, the glass in steel frame windows can be UV-coated to protect indoor furnishings and art from sun exposure.

a bright and airy london renovation, steel frame doors with square panes includ 20
Above: A bright and airy London renovation, steel-frame doors with square panes included. Photograph by Matt Clayton; to learn more about the project, see Reader Rehab: A Photographer’s Kitchen in London.

Are there different styles of steel windows and doors?

Steel windows are available in a range of looks, from factory-style with a floor-to-ceiling collection of panes, to Frank Lloyd Wright–inspired style (his Falling Water House famously used steel windows), to a modern minimalist look with large panes of glass supported by pencil-thin sleek steel frames.

Steel windows are available in a multitude of operable variations, including casement, in-swing, out-swing, awning, horizontal pivoting, vertical pivoting, folding, and hopper.

in a brooklyn renovation by elizabeth roberts design/ensemble architecture 21
Above: In a Brooklyn renovation by Elizabeth Roberts Design/Ensemble Architecture, a double-height wall has folding steel doors that open into a garden. For a full tour, see Indoor/Outdoor Living, Brooklyn Style.

Steel windows can be used in interiors as light-permeable room dividers. Doors are not commonly offered as sliders (Euroline does offer sliding pocket steel doors), so those seeking a full open outdoor wall experience often go with folding steel doors.

The folding doors above (from Optimum Window in Ellenville, New York) create a double-wide opening to the garden.

not always black, gray factory style doors complement the adjacent gravel court 22
Above: Not always black, gray factory-style doors complement the adjacent gravel courtyard at a Brooklyn townhouse by architect Steven Harris (a member of the Remodelista Architect & Designer Directory).

How much do steel frame windows and doors cost?

Steel frame windows are expensive. Like many aspects of a home remodeling, steel window pricing is very site specific. Is it a single window replacement? A full remodel? Custom or standard sizing? The best way to estimate cost is to get a quote from your contractor or window supplier. In general, expect prices to be at least double that of wood, more than aluminum, but less than bronze. Remember to balance the cost with the longevity (we just had to replace a full wall of 15-year-old weather-worn wood frame windows) and other attributes.

a steel frame door brings light into remodelista co founder francesca connolly& 23
Above: A steel frame door brings light into Remodelista co-founder Francesca Connolly’s Brooklyn Heights kitchen. Photograph by Matthew Williams for Remodelista.

Where can I buy steel factory-style windows and doors?

Beware of cheap imitators. Suppliers of fabricated windows and doors that come highly recommended by several architects and builders include:

in a renovated mews home in london, a steel frame wall by crittal rep 24
Above: In a renovated mews home in London, a steel frame wall by Crittal replaced a solid partition, creating a divider that still feels open. Photograph by Chris Tubbs. For more, see A 600-Square-Foot North London Renovation Blessed with the Mellersh Touch.

Can I use reclaimed steel factory windows and doors?

Yes! Reclaimed steel factory windows can be found at architectural and design salvage yards. Keep in mind that the price of fabulous vintage looks may include needed repairs and re-coating. Reclaimed steel factory windows found at architectural supply yards, such as Recycling the Past, cannot, obviously, be customized to your setting; rather, your setting may need to be customized to fit them.

Steel Frame Windows and Doors Recap


  • Strong
  • Slim sight lines
  • Work with a range of architectural styles
  • Durable and long-lasting
  • Low maintenance


  • Expensive
  • Heavy
  • Not the best choice in climates near saltwater. More protection and proper finishing is required to prevent airborne salt corrosion
in hotel with a history: a landscape of sun and stone at la granja ibiza,  25
Above: In Hotel with a History: A Landscape of Sun and Stone at La Granja Ibiza, steel frame doors modernize rustic interiors.

For more on steel frame windows and doors, see Exterior Finishes: 11 Facades with Factory Windows and Hardscaping 101: Steel Factory-Style Windows and Doors on Gardenista.

Starting a project? Consult our Remodeling 101 posts, including:

N.B.: This post is an update; the original story ran on September 3, 2015.

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Frequently asked questions

What are steel frame factory-style windows and doors?

Steel frame factory-style windows and doors are made of strong and durable steel frames with glass panes to allow light to pass through. They are designed in a minimalist industrial style that complements modern home designs.

What are the advantages of steel frame factory-style windows and doors?

The advantages of steel frame factory-style windows and doors are that they are strong, durable, and low-maintenance. They provide excellent insulation, are weather-resistant, and last for many years without warping or rotting.

Do steel frame factory-style windows and doors require much maintenance?

No, steel frame factory-style windows and doors require little maintenance. They are highly resistant to insects and do not rot or warp like wooden windows and doors. They may need some occasional cleaning, but that is all the maintenance they typically require.

What are some of the visual benefits of steel frame factory-style windows?

Steel frame factory-style windows add a chic industrial touch to modern homes. They create a minimalist aesthetic while still allowing plenty of natural light to enter the space. Additionally, they are versatile and fit well with many different interior design styles.

What are some of the disadvantages of steel frame factory-style windows and doors?

One of the main disadvantages of steel frame factory-style windows and doors is that they are expensive compared to other types of windows and doors. They also conduct heat and cold quickly, which can make them feel drafty and less energy-efficient.

Can steel frame factory-style windows be customized to fit my home's unique needs?

Yes, steel frame factory-style windows can be customized to fit a variety of unique needs. Different manufacturers offer various options, finishes, and configurations to ensure that they fit perfectly into any home's design and functionality.

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