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Quantam Windows and Doors

Quantam Windows and Doors

Handcrafting custom architectural wood, clad and steel fenestration for discerning architects, builders and homeowners. From design innovation to fabrication, Quantum takes an amazingly interactive approach to producing some of the best windows and doors in North America.

Who We Are

Quantum is a throwback to a time when people "crafted" products and demonstrated a vested interest in their work. Quantum was founded in 1982 as a response to the industry's demand for better built custom wood windows. Quantum's founders were general contractors dissatisfied with the mass produced windows available.

From humble beginnings in a general contractor's garage Quantum has become a national leader in the custom residential and commercial fenestration industry.

What We Do

As an industry leader, Quantum sets the standard for others in architectural fenestration. Our products appear in award winning, internationally acclaimed projects. Our name has become synonymous with luxury and sustainability.

From design innovation to fabrication, Quantum has developed a national reputation for handcrafting the finest custom architectural windows and doors. Blending contemporary production techniques with intensive hand detailing, Quantum satisfies both industry demands and client vision.

Our Products


  • Signature Series Windows
  • Classic Series Windows
  • Legacy Series Windows
  • Euro Series Windows


  • Hinged & Pivot Doors
  • Lift & Slide Doors
  • Slide & Fold Doors

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Happy Clients & Vendors

Testimonial Alan Burradell - Builder

"As a General Contractor working on residential remodels, there are several things that I carefully consider as I select among the many window dealers and sales representatives available to me. Among them are product knowledge, good communication, follow up and good service support. Loren Monge and ABSi regularly deliver on each of these and many others, which is why I continue to work with Loren exclusively on all of my projects. Thanks Loren!"

Alan Burradell  
Burradell Construction      

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Oxnard • Torrance • Costa Mesa • San Diego • Truckee • Burlingame • San Jose • Santa Rosa • Dublin