Clean lines and serious muscle. That’s the kind of combo that makes steel stand out. And what you’re seeing here? It’s not just any window — it’s our RTS-430 Thermally Broken Steel Series, showcased in a custom arched casement assembly.
This one checks all the boxes: energy-efficient, architecturally bold, and built to last.
Minimal Sightlines, Maximum Impact
We designed the RTS-430 series with slim profiles that don’t compromise on strength. That arch? Not just for looks. It’s engineered with the same structural integrity we bring to all our steel systems.
Steel lets you go big without bulking up — wide-open views, uninterrupted glass, and just enough frame to hold it all together. When you add in the thermal break technology, you’re looking at a product that performs like a tank but still looks like art.
Built for Performance
The RTS-430 Series isn’t just pretty. Here’s what it delivers:
| Feature | Benefit |
|---|---|
| NFRC Certified | Proven thermal performance |
| Dual/Triple Glazing Options | Energy efficiency, year-round comfort |
| Compression Gasket System | Maximum air and water resistance |
| Crimped + Welded Construction | Rock-solid durability |
| Stainless Steel Profile | Corrosion resistance, longevity |
Whether it’s summer heat or winter chill, this window keeps the inside steady and the outside where it belongs.
All Custom, All the Time
Every RTS-430 unit is made to spec. No off-the-shelf shortcuts. That arched casement? Cut, welded, and built from the ground up to match the project — whether it’s for a new home or a historical renovation.
We offer true divided lites, simulated divided lites, and every kind of configuration you can imagine. Want it to swing in? Out? Pair it with a door? We’ve got it.
Steel That Works Harder
Let’s be honest: nothing outlasts steel. Especially when it’s hot-rolled and backed by decades of engineering and craft. We’ve been doing this for more than 30 years, and it shows in every weld.
But what really sets the RTS-430 apart is how it blends timeless design flexibility with modern thermal standards. It’s the kind of window that looks right at home in a century-old brownstone or a brand-new build.
Steel windows don’t just frame the view — they define the space. The RTS-430 Series proves that clean lines and high performance can live in the same frame.
Want to talk arched windows or custom projects? Contact us and let’s make it happen.
