Your spectacular vistas deserve the finest, most energy-efficient windows and doors from Monumental. Located in Southern California, Monumental is the premier manufacturer and supplier of high-performance aluminum windows and doors across the Western U.S., including our groundbreaking 5000 Series Sublinear Sliding Door Systems. Our customized aluminum windows and doors are made in-house with state-of-the-art equipment—and that means your orders are never late. Work with a California window and door company with over 40 years of experience and modern craftsmanship to make your home flawless.

Don’t overlook the finishing touches, they can be Monumental.

The Monumental Difference

4550 Vari-Slide Doors

The 4550 series Vari-Slide™ door is thermally-broken and custom-designed for telescoping multiple large panels. It is designed with options for pocketing and stacking. System configuration options are endless!

Each system is custom-built using semi-automated fabricating equipment for numerous configurations including 90 & 135 degree units, with options for motorization.

Our newly designed flush pulls and latch assembly are made of aircraft quality precision-milled stainless steel, with a large actuator for finger- touch operation. The maximum security laminated hook-lock is an industry standard; and has been used for years by commercial door manufacturers to meet strict forced-entry requirements.

Products

4510 Folding Door

Our 4510 series is a revolutionary folding door system that is bottom-weighted; eliminating any structural requirements or additional engineering that more traditional folding systems require. The system is designed to support oversized panels and minimum profiles, with excellent thermal values.

With built-in thermal intelligence, the system caters to the latest technology to achieve high performance and includes a polyamide thermal break, in favor of traditional resin thermal breaks.

The 4510 folding door offers an aesthetically pleasing system; an integral concealed locking solution, beautiful finishes and expertly designed hardware.

4550 Vari-Slide Doors

The 4550 series Vari-Slide™ door is thermally-broken and custom-designed for telescoping multiple large panels. It is designed with options for pocketing and stacking. System configuration options are endless!

Each system is custom-built using semi-automated fabricating equipment for numerous configurations including 90 & 135 degree units, with options for motorization.

Our newly designed flush pulls and latch assembly are made of aircraft quality precision-milled stainless steel, with a large actuator for finger- touch operation. The maximum security laminated hook-lock is an industry standard; and has been used for years by commercial door manufacturers to meet strict forced-entry requirements.

4580 Glass Window Wall

The 4580 Glass Window Wall by Monumental Windows and Doors is a gorgeous way to bring outside views in, and open up your home to the world. This exterior aluminum wall of windows can be steel-reinforced to support large expanses of glass, elevating your home with luxurious California style. As the window wall manufacturers of choice for the Coachella Valley, Southern California, Hawaii, Washington, and many other regions of the United States, Monumental wanted to create a product showcasing high-end form, function, and multiple options for custom finishes.

6000 Series: Hinged Door

The 6000 series hinged door is a traditional style aluminum door that performs in both commercial and residential applications. We can build these doors for openings as large as 6 feet wide and 12 feet tall.

Pair our 4580 Window Wall for a main entrance with a Monumental impact.

Hardware
Standard hardware includes a maximum security lock and hardware available in both polished chrome and brushed stainless. Custom finishes by request.

Emtek levers are standard on single doors, and square offset straight pulls are standard with pairs of doors.

Overhead closers optional.