Welcome to Monumental Windows and Doors™

Modern living room

Monumental Windows and Doors™ is a manufacturer and supplier of premium quality aluminum windows and doors for luxury real estate projects, headquartered in Southern California.

A high-end home isn’t complete without a Monumental view, which is why we are proud to work with licensed glazing contractors and dealers to supply the finest aluminum windows and doors for properties across the southwest United States and beyond. 

As established manufacturers and suppliers with a large dealer network, we can create custom window and door orders for homes in many large markets including Phoenix, San Diego, Los Angeles, Napa Valley, Las Vegas, Palm Desert, Orange County, and Hawaii among others. To learn more about how to become a Monumental dealer and apply, click here.

Monumental Windows and Doors is a family-run business based in Palm Desert, CA with more than forty years in the industry. Our products are made in the USA using recycled aluminum. All of our manufacturing and production work is done in-house by Monumental, from order to delivery. We are the premier window manufacturers in southern California!

State-of-the-art equipment in our manufacturing facility, combined with the best engineers in the business, means we won’t hold up your project. If you would like to be matched up with a Monumental dealer to place an order, click here.


Looking for a Monumental difference in your project?

Why Wait For Products That Are Available To Builders, Architects, and Luxury Home Buyers Today?

Monumental’s finest windows and sliding glass doors are crafted using modern aluminum design—inspired by California style with European influence. All of our products are NFRC-tested and California-compliant, with Energy-Star-rated glazing. We offer myriad high-performance glass options, including security glass. Explore our most popular products for commercial or residential projects here.

5000 Series: Sublinear Sliding Glass Door System

Our patented reverse rolling assembly for the new Sublinear Sliding Glass Door Systems gives the homeowner the confidence of on-track performance, easy cleaning, and minimal maintenance. Built with California innovation, the Sublinear track assembly disappears into the floor, giving an unbroken Monumental view.

The sill is designed to be integrated into the flooring, which runs through to the exterior without raised tracks and remains largely hidden from view. In fact, when the doors are closed, there is no track visible from the exterior. Slide, Pivot, or Pocket, you design the look and feel of your sliding glass door systems. Custom-made with modern craftsmanship, these systems are a homeowner’s, architect’s, and builder’s dream.

4580 Window Wall

Solid construction meets elegant flexibility—and sightlines for days. You’ll love the slim profile of our 4580 Window Walls and their many integrations into our products for endless variations on look and feel. As with all of our products, custom finishes are available.

4510 Folding Door

Our 4510 series is a revolutionary folding door system that is bottom-weighted; eliminating the structural requirements and additional engineering that more traditional folding systems require. The system is designed to support oversized panels and minimum profiles, with excellent thermal values. The 4510 Folding Door offers an aesthetically pleasing system: an integral concealed locking solution, beautiful finishes, and expertly designed hardware.

3000 Window Series

Our 3000 Window Series products are premium quality windows available in numerous standard and custom configurations. All are thermally broken and rich in appearance and performance. Choose from Fixed, Projected, or Horizontal Sliding windows to match your design needs.

4550 Series Vari-Slide™ Sliding Door System

With the 4550 series Vari-Slide™ sliding glass door system, virtually all customization options are available. That includes 90- & 135-degree units with options for motorization (hardwired or wireless). Choose your precision-engineered stainless steel tandem rollers available in three rail sizes.

We stock materials in the following finishes:

  • Bronze Anodized
  • Desert Tan
  • Sky White
  • Clear Anodized
  • Custom colors available

Turn your house into a home with help from Monumental Windows and Doors.

Environmentally Friendly and Energy Efficient

Our thermally broken aluminum windows and doors are among the most energy-efficient in the industry. Aluminum windows and doors have the capacity to exceed normal energy efficiency standards. They are engineered using a high-performance dual glazing method that creates a thermal break in the framing construction, creating an energy-saving exterior that lasts well beyond the average door or window lifespan. This level of energy efficiency also provides comfort year-round—in any climate. 

Thermally broken aluminum-framed windows and doors are a great option for those who are looking for environmentally friendly and energy-efficient home features. These products are designed to reduce energy consumption and emissions by providing a high level of insulation. 

The thermal break, which is a layer of material inserted between the aluminum frames, acts as a barrier against heat transfer, reducing heat loss during the winter and heat gain during the summer. As a result, homes that use thermally broken aluminum-framed windows and doors can save energy and reduce their carbon footprint. This feature also helps to create a more comfortable living environment by reducing drafts and ensuring a more stable indoor temperature.

Aluminum is a recyclable material, and Monumental Windows and Doors incorporates recycled aluminum into its luxury products. Old aluminum-framed windows and doors can be melted down and repurposed into new products that last for years. This not only reduces the amount of waste sent to landfills but also saves energy and resources needed to produce new materials. 

Aluminum-framed windows and doors also have a long lifespan and require minimal maintenance, which further reduces their impact on the environment. Choosing thermally broken aluminum-framed windows and doors can have a significant impact on reducing energy consumption and emissions while providing a durable and environmentally friendly option for your home.

Purchasing a Monumental product ensures your home is keeping its carbon footprint small and minimizing environmental impact without impacting the high-end results you seek.

Standards and Certifications

As leaders in the industry, it is paramount that we maintain the highest standards and certifications achievable for our award-winning products. We certify our products and processes through the following highly respected organizations:

  • The National Fenestration Rating Council (NFRC) - The National Fenestration Rating Council sponsors an energy efficiency certification and labeling program for windows, doors, and skylights. Consumers can find energy performance ratings and other useful information.
  • The American Society for Testing and Materials (ASTM) - Monumental performs tests for design pressure according to ASTM standards. ASTM International, formerly known as the American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.
  • The Fenestration and Glazing Industry Alliance (FGIA) / (formerly the American Architectural Manufacturers Association) - The FGIA provides “research consensus-based standards, product certification, advocacy, education, and professional development” for members. We work with the FGIA to obtain independent product performance ratings for our windows and doors.
Monumental Windows and Doors certified by