Quantum Windows and Doors

Founded in 1982, Quantum Windows and Doors Windows and Doors has established itself as an industry leader in crafting high-quality custom wood, clad, and steel windows and doors. Our commitment to craftsmanship and design excellence began in a small shop north of Seattle, WA, where we responded to the demand for superior custom wood windows by offering products that matched the craftsmanship of the homes they adorned. Over four decades, we have expanded our product lines to include innovative clad and steel solutions while maintaining our focus on sustainable materials and environmentally responsible practices. Our team partners with suppliers dedicated to quality and sustainability, ensuring every product bridges the natural world with modern architectural needs. With a state-of-the-art production facility in Arlington, WA, we continue to push boundaries in fenestration technology, delivering solutions for architects, builders, and homeowners worldwide.

Our legacy of innovation includes pioneering advancements in thermal insulation, air and water resistance, and large-scale opening systems like Lift & Slide and Slide & Fold doors. We remain locally owned, prioritizing a healthy, safe, and collaborative work environment that reflects our core values. From initial design to fabrication, our interactive approach ensures every project achieves unparalleled quality and aesthetic precision. Our product portfolio spans Signature Series Windows with narrow sightlines, Legacy Series double-hung windows with modern upgrades, and Steel Curtain Walls that combine clean lines with technological sophistication. As we evolve, our mission remains unchanged: to produce the highest-quality products while minimizing environmental impact through responsible material and process choices.