Across Brooklyn, old brownstones are being reborn.
Behind those original brick facades, homeowners are seeking modern light, better airflow, and lasting materials — all without losing the building’s classic appeal.
That’s where custom steel windows and doors make a difference.
This project in Brooklyn showcases how Optimum Window’s architectural steel systems redefine what “home” can mean in an urban landmark.

Modern Appeal, Classic Charm
This brownstone renovation captures the soul of old New York while introducing light, openness, and precision.
The ultra-slim profiles of our hot-rolled and thermally broken steel systems create an uninterrupted connection between indoors and out — giving the home a modern edge without sacrificing authenticity.
The dark frames add contrast, making each window a focal point that highlights the architecture rather than competing with it.
A More Livable Setting
Beyond looks, steel framing introduces a different kind of livability.
With thermally broken technology found in our RTS430 and Flex 6500SB Series, these windows and doors regulate interior temperature while maximizing natural light.
Residents experience better insulation, higher acoustic performance, and durable operation that stands up to the city’s varied climate.
| Feature | Description |
|---|---|
| Material | Cold-rolled or hot-rolled steel, available in stainless, bronze, and Corten finishes |
| Thermal Performance | U-values as low as 0.19, NFRC certified |
| Customization | Oversized glazing, divided lites, color-matched finishes |
| Warranty | 10-year powder coat finish warranty |
| Origin | Proudly fabricated in the USA |
Endless Customization Options
Optimum’s systems are fully welded and engineered per project, allowing architects to shape unique configurations from oversized casements to slim French doors and floor-to-ceiling partitions.
Each piece can include true divided lites, custom hardware, or fire-rated capabilities up to 90 minutes.
This flexibility means every brownstone, townhouse, or loft can maintain its architectural rhythm while upgrading to modern standards.
Sustainability Meets Strength
Every Optimum system is made from 100% recycled steel, combining longevity with environmental responsibility.
Our powder-coated finishes meet AAMA 2604 standards, ensuring color retention and corrosion resistance even in urban environments.
These windows don’t just look strong; they are strong, offering unmatched security, low maintenance, and energy efficiency.
| Environmental Benefit | Detail |
|---|---|
| Recycled Steel Content | 100% recycled material |
| VOC-Free Finishes | Zero VOC powder coatings |
| Energy Code Compliance | Meets or exceeds NYC Energy Conservation Code |
| Longevity | Life-cycle far exceeds aluminum or wood |
A New Standard for Brownstone Living
By reimagining traditional materials with contemporary technology, we’ve created a new benchmark for urban residential design.
Every project, like this Brooklyn brownstone, reflects what steel does best:
combine structural excellence with refined beauty.
Creating a more accommodating and livable setting isn’t just a design statement; it’s proof that true craftsmanship never goes out of style.