Steel Windows with the Best U-Values
What Is a U-Value and Why It Matters When you’re trying to build or upgrade an energy-efficient space, the U-value of your windows is a key number to look at. U-value tells you how much heat escapes through a window. The lower the number, the better the insulation. Simple as that. U-Value vs R-Value: What’s […]
IGUs vs. Single Glazing: Are You Wasting Energy?
What Is Single Glazing? Definition & Common Uses Single glazing is a single sheet of glass set into a window frame. It was the standard for decades and still appears in older homes and buildings. It’s cheap. It’s simple. It lets in plenty of natural light. But it doesn’t insulate much. Heat moves in and […]
RAL Powder Coating: The Bold Finish Architects Love
RAL powder coating isn’t just a finish — it’s the final detail that makes your design unforgettable. From boutique residential builds to legacy commercial projects, we’ve seen firsthand how much the right coating matters. We use RAL powder coating across our architectural steel window and door systems because nothing else matches its durability, color control, […]
Low-E Glass: The Invisible Upgrade Your Steel Windows Need
You can’t see it. You won’t feel it. But it changes everything.We’re talking about low-emissivity glass coatings—better known as Low-E glass—and why it’s one of the smartest upgrades you can make for your home or project. At Optimum Window, we build premium steel windows and doors that pair beauty with high performance. And Low-E glass […]
Summer-Ready Skylights That Change Everything
As summer 2025 heats up, it’s time to talk windows. Specifically, custom steel-framed skylights—a solution we’ve been perfecting for years at Optimum Window. Why now? Because when the sun’s beating down and your AC’s working overtime, the quality of your windows and skylights matters more than ever. Let’s break it down. Less Frame, More View […]
What Are Steel Casement Windows?
Steel casement windows are hinged windows that swing open like a door. They’re known for their sleek frames, durability, and architectural character. Whether you’re building modern or restoring historic, they bring that “less frame, more glass” look with serious performance. Understanding Casement Windows How Casement Windows Open Casement windows are hinged on one side and […]
Steel Serenity: Oversized Windows Meet Wine Country
In the hills of Healdsburg, California—where vineyard views stretch beyond the horizon—oversized steel windows bring the outdoors in without missing a beat. We designed and built this custom installation for a luxury bedroom where scale and simplicity mattered most. Where Design and Durability Collide This home’s owners weren’t interested in “good enough.” They wanted unobstructed […]
Iconic Steel Style: Princeton Windows in NYC
Our Princeton Series hot-rolled steel windows aren’t just frames—they’re a statement. When we teamed up with architects on this New York City renovation, we knew these solid steel windows would do more than meet specs—they’d transform the entire facade. Historic Soul Meets Modern Strength This building sits in Manhattan’s historic SoHo neighborhood, a place where […]
Flex Series Cold-Rolled Steel Windows for Heritage Buildings
At Optimum, we take pride in creating custom steel windows that preserve the character of the past while meeting the demands of today. Precision matters. So does the story behind every structure. That’s why our Flex 6500SB Series is built with the strength and subtlety that heritage buildings deserve. Built for the Past, Engineered for […]
Divided Lites vs Single Pane: Which Style Wins?
What’s the Real Difference Between Divided Lites and Single Pane? When we’re talking about divided lite windows versus a single pane, it’s all about how the glass looks and functions. Understanding Individual Panes and Window Grilles In traditional windows, grilles or grids were needed to hold individual panes together. Old wood window designs relied on narrow strips of wood called muntins to create that familiar grid pattern. Today, modern windows […]
