Ultra™ Series | C650 Fiberglass Windows

Beautiful and contemporary, these fiberglass windows are strong and built to last. Create the home of your dreams.

Ultra™ Series | C650
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The stunning look of a high performance window.

Ultra Series Fiberglass picture windows and out-swing patio door
Ultra Series single hung windows in Bronze
Your style, envisioned.

If you can dream it, we can build it. Ultra Series is the ultimate, upscale fiberglass window that makes a visual impact. The fiberglass material resists swelling, rotting, and warping making it the perfect choice for long-lasting durability coupled with exceptional beauty.

Benefits of Ultra Series | C650

  • Exterior Frame Colors
  • Durability and Energy Efficiency
  • Hardware
  • Lifetime Limited Warranty
Ultra Series Exterior frame color

Exterior Frame Colors
Looking for a dark interior frame to match the exterior? You’ll find it with Ultra Series fiberglass windows. Choose Bark or Black Bean to create the popular dark window frame look. We have four beautiful exterior frame colors available. 

Durable and Energy Efficient

Durability and Energy Efficiency

Ultra Series fiberglass custom windows are heat and cold resistant, durable and low-maintenance. The frame expands and contracts at approximately the same rate as the insulated glass it holds, putting less stress on the seals for a clear view. Choose an energy package for your area and learn about ENERGY STAR®.

Hardware

Hardware
Milgard Ultra Series window hardware is attractive, durable, secure, and easy to operate. Available in white, clay, dark bronze, brushed chrome or black. Choose from the Positive Action Lock or optional Cam Lock for single hung or horizontal slider windows. Folding nesting operator handles are standard for casements and awnings.

Lifetime Limited Warranty

Lifetime Limited Warranty

Ultra Series windows are covered by the Milgard Lifetime Limited Warranty for peace of mind. 

Ultra Series | C650 Operating Styles

  • Single Hung
  • Horizontal Slider
  • Casement
  • Awning
  • Picture
  • Radius
  • Bay & Bow
Single Hung Fiberglass Windows

Single Hung
Chose a single hung window for venting and daylight. The bottom sash is operable and opens by moving upward. Pulling downward closes and locks the window. Ultra Series fiberglass single hung windows have two choices for hardware: a Positive Action Lock or Cam Lock.

Horizontal Slider Fiberglass Windows

Horizontal Slider
Horizontal sliders are a common window style. Choose from a left or right side operable sash to allow airflow into any room. Ideal for windows facing a balcony or patio because they do not protrude toward the exterior of the home. Great for replacement window and new construction jobs.

Casement Fiberglass Windows

Casement
Choose a casement window for maximum ventilation in your home coupled with an unobstructed view. They hinge on the side and open just like a door. This fiberglass window style comes with a folding nesting handle set. 

Awning Fiberglass Awning Windows

Awning
Ultra Series fiberglass awning windows open outward from the bottom allowing for excellent airflow. Awning windows come with a folding nesting operating handle.

Picture Fiberglass Picture Window

Picture
Picture windows are the best way to frame a beautiful view. These inoperable fiberglass windows let in natural light and can be used in combination with operable fiberglass windows if airflow is desired in a particular room. 

Radius Fiberglass Window

Radius
Ultra Series fiberglass radius windows come in operable or inoperable styles. What sets them apart is the curved feature, which can be a simple arched top or even a circular window shape. A beautiful and elegant option, radius windows can also have grids added. 

Fiberglass Bay and Bow windows

Bay and Bow
Bay fiberglass windows are three-segment units that expand your space to the outdoors. Bow fiberglass windows are four or more equal-width panels that create a dramatic, curved space in your home. Add operating styles for airflow in addition to daylight.

Our Window and Patio Door Experts are Here to Help!

Reviews

Ultra™ Series | C650 Fiberglass Windows

See All Reviews
Ultra™ Series | C650 Fiberglass Windows is rated 3.7 out of 5 by 371.
Rated 5 out of 5 by from Once You Go Milgard,You Don't Back! We love our windows. We remodeled a Mid Century Ranch using the black Ultra series,and now the house looks Spectacular. During the renovation we received so many compliments on the windows. Definitely a stand out in the neighborhood now!
Date published: 2022-06-21
Rated 5 out of 5 by from Excellent Had seven windows and two patio sliders installed 7/12/19 replacing the fourty-five year old originals. As expected the difference is great. They are beautiful and make a statement with the crimson exterior color. Only one issure with one screen that the seller is taking care of. Even the installers kept saying "man these are nice windows"! I'm sure they will last longer than I do! Thanks Milgard!!!
Date published: 2019-07-25
Rated 5 out of 5 by from Solid, beautiful, perfect functionality. Perfect tinting and most perfect installation by true professional (Pete) from Brennan Ind
Date published: 2019-07-02
Rated 4 out of 5 by from High quality Sold craftmanship and brings a higher level of sophistication to the home. May take a minute for a first time user to figure out how to unlock an open etc...
Date published: 2019-05-24
Rated 5 out of 5 by from Love the Black Bean Frame Installed for a new build. Interior and exterior in black bean, casement, picture, slider windows. It's a strong and durable framing and the casement mechanism looks durable. One thing to note since various trades that have come through after window installation:drywall, paint, finish carpentry etc, somehow a few nicks occurred in the window frame. In black bean, the white specks show up and it looked like paint specks but i learned sadly it was the black bean baked paint had been nicked through to show the white underlying structure. I did not notice until the windows and house was CLEANED from the construction dirt/debris. I love the look of the frame and did not install additional trim inside the window openings.
Date published: 2019-05-13
Rated 5 out of 5 by from Abosolutely amazing Just got this window installed and I could not be happier with the result. I have looked at many windows and my wife and I decided to this one out. The biggest difference between most windows and this one was the look of the frame. You can tell the quality if far superior to most windows. I will never recommend anything but milgard
Date published: 2019-05-09
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