Through years of Research & Development we have achieved & surpassed numerous building code requirements.

Thermally Broken Doors & Windows

Presidio Doors and Windows has solved the issue of your expensive steel doors and windows rusting. 

Rigorous Testing, Superior Product

Presidio’s Doors and Windows have been put through rigorous third party testing. Below are some of the results achieved.

Presidio’s Fixed Windows have a DP60 wind rating (160 MPH Wind Speed). Presidio Windows have been tested and passed ATSM E 283 Air Infiltrations / ASTM E 331 Water Resistance / ASTM E330 Uniform Load.

Presidio Double Doors have a DP50 wind rating (150 MPH Wind Speed). Presidio Doors have been tested and passed ATSM E 283 air infiltration / ASTM E 547 Water Resistance / ASTM E330 Uniform.

For detailed reports please feel free to contact Presidio directly.

Solid Hot-Rolled Steel

What makes solid hot-rolled steel a superior material? For starters, it is three times stronger than aluminum and sixteen times stronger than wood. This strength allows Presidio to make windows and  doors with the slimmest frames, the greatest amount of glass, and in virtually unlimited scale, shapes, and configurations.

Presidio uses hot-rolled steel for all it’s windows and doors in order to provide optimal thermal performance. The raw material conducts heat and cold at one-fifth the rate of aluminum substrates. For even greater thermal performance Presidio offers thermal-break technology.

This advanced thermal-break technology provides exceptional thermal performance and condensation resistance without splitting the steel frame, thus maintaining the proven structural integrity of solid hot-rolled steel windows and doors.

Presidio, hot-rolled steel can sustain the load requirements and achieve the exact aesthetics desired for immense openings, even in areas with the most strict building codes and environmental considerations such as High Velocity Hurricane Zones with our DP80 rated windows and doors.

Narrow Sightlines

These words often describe the unique look of Presidio’s windows and doors. The narrow and graceful lines belie their formidable strength and ultimate durability. Presidio’s windows and doors are timeless in appearance and endure generations.

Thermally Broken and Galvanized Steel door & window options.


What is Galvanizing?

Hot-dip galvanizing is the process of immersing iron or steel in a bath of molten zinc to produce a corrosion resistant, multi-layered coating of zinc-iron alloy and zinc metal. While the steel is immersed in the zinc, a metallurgical reaction occurs between the iron in the steel and the molten zinc. This reaction is a diffusion process, so the coating forms perpendicular to all surfaces creating a uniform thickness throughout the part.

Presidio Doors & Windows Galvenizing Process
  • The hot-dip galvanizing process (image above) has been used since 1742, providing long-lasting, maintenance-free corrosion protection at a reasonable cost for decades. Although hot-dip galvanizing has been utilized to protect steel for generations, the galvanizing process continues to evolve with new technologies and creative chemistries. The three main steps in the hot-dip galvanizing process are surface preparation, galvanizing, and post-treatment, each of which will be discussed in detail. The process is inherently simple, which is a distinct advantage over other corrosion protection methods.


  • Once the steel has been completely cleaned, it is ready for immersion in the zinc bath. The galvanizing kettle contains zinc specified to ASTM B6, a document that specifies any one of three grades of zinc that are each at least 98% pure. Sometimes other metals may be added to the kettle to promote certain desirable properties in the galvanized coating.


  • The galvanizing kettle is heated to a temperature ranging from 820-860 F (438-460 C), at which point the zinc is in a liquid state. The steel products are lowered into the galvanizing kettle at an angle, and stay in the bath until the steel heats to the bath temperature. Once the diffusion reaction of iron and zinc is complete, the steel product is withdrawn from the zinc kettle. The entire dip usually lasts less than ten minutes, depending upon the thickness of the steel.


  • There are many other types of corrosion protection systems, such as coating steel with oil, grease, tar, asphalt, polymer coatings or paints, or corrosion resistant materials such as stainless and weathering steel, sacrificial anodes, plating systems and impressed current systems. These are some of the most commonly used corrosion protection materials and systems and are sometimes used in conjunction with hot-dip galvanized steel. Most of these materials rely on barrier protection, while some of them rely on cathodic properties to resist steel corrosion. The most effective system that provides both barrier and cathodic protection is hot-dip galvanizing.




Presidio Doors helps guide you along the way to ensure your vision is achieved. Presidio Doors has earned a reputation for continuously achieving new possibilities in window and door design. Offering more interesting forms on the grandest scales and with more dynamic functionality, no design is too ambitious for Presidio Doors. ANY STYLE IMAGINABLE

Whether new construction, remodel, retrofit, or historic preservation, architects and designers incorporate Presidio Doors’ windows, skylights, and doors into every variety of architectural style from grand renaissance and gothic revival to imaginative avant-garde and postmodern luxury homes.

To achieve the longest life cycle potential for Presidio Doors’ steel windows and doors, Presidio Doors’ provides the world’s most advanced finishing system available. Developed in cooperation with top U.S. metallurgists and architectural coatings suppliers, Presidio Doors’ finishing system is engineered to ensure that windows and doors remain pristine and free from corrosion decade after decade, even in the harshest of environments. For the top coat there are unlimited color choices, including metallics and patinas. You can also work with Presidio Doors to create a custom color to perfectly integrate with your design.