Precision built luxury steel windows and doors that are timeless, beautiful and minimalistic

Breathtaking Beauty. Breakthrough Performance

For over 20 years, Portella has pioneered new technologies that lead the industry. With our patented, thermally broken frame system, former limitations in customization simply disappear. Our innovations open up a world of possibilities for designers and architects who need impossible sightlines, the highest energy efficiency ratings and extreme durability with expressive elegance.

Now you can achieve your ultimate vision and reimagine architecture without boundaries. And we’ll be here to guide you every stop of the way.

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Custom steel windows and doors from Portella feature narrow sight lines, exceptional strength, and unique sizing not to mention virtually limitless design options.

Portella Announces The Contemporary 3-D Metal Door

Portella Announces The Contemporary 3-D Metal Door

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Portella is proud of our commitment to continue product development, testing and certification complience. Our doors and windows are third-party tested and have ASTM, NFRC, AAMA, and soon Florida Building Code certifications.

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A Solution to Steel Window and Door Thermal Challenges

Artisan Series is a solution for luxury residential, boutique commercial applications or historical projects. Our Artisan Series is NOT a variation of existing non-thermally broken European extrusion products or “enhanced” thermally broken profiles. Portella’s Artisan specialty doors utilize a GRP (fiberglass reinforced polyetherimide) which is a non-conducting material with steel, that combines strength and superior thermal performance. Manufacturers offering only insulated glass without addressing the thermal transfer of the frame does to solve the problem. We invite you to view the Artisan design guide on our Artisan product pages.

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The Ronson Home - front view

Portella Difference

Portella understands what Architects are looking for. Here is what makes Portella different:

  • Trademark narrow-profile sightlines
  • Factory installed glass with Low-E options for maximum energy efficiency
  • NFRC rated thermally broken laser fusion welded and cold-rolled options
  • Wet glazed glass eliminates any possibility of moisture penetration
  • Clear and concise communication from quotation to shop drawings
  • Tested and engineered designs
  • One point communication with knowledgeable Portella Project Managers
The Ronson Home - front view

Blog & News

How to Figure Out the Architecture Style of a Home

At its core, architecture is the design and construction of all homes, buildings, and structures. Within general architecture, there are hundreds (or possibly thousands) of types and subtypes of architectural styles that vary greatly based on many factors, including the geographic location, era of construction, available materials, technology, and design taste of the time. If […]

How to Update the Exterior of a Ranch-Style Home

Ranch-style homes exploded in popularity in the 1940s and stayed popular through the 1970s in the United States. In fact, during the 1970s, over 60 percent of new homes built in the United States were ranch-style homes.  Eventually, the popularity of ranch-style homes was overtaken by the larger custom homes of the 1980s, but many […]