Milgard Ultra Windows Review

Milgard Ultra Windows Review

Modern and contemporary homes deserve modern and contemporary windows. Milgard offers a stunning choice for your home. In this post, we’ll introduce you to Milgard’s Ultra Series windows. 

What are Milgard Ultra Windows?

Ultra series windows are strong, low-maintenance, and perform well in any climate. Milgard uses a pultrusion process to create their fiberglass window frame lineals. The process combines and catalyzes fibers of glass and resins to strengthen the lineals. Milgard regularly tests for quality and long-lasting performance. 

Milgard Ultra windows are available in seven operation styles including some of the most common styles used in American homes.

Ultra window styles include:

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

Advantages of Milgard’s Fiberglass Frames:

  • Traditional wood profile
  • Strong enough to hold large expanses of glass
  • Low-maintenance
  • Paintable
  • Durable

Are Milgard Ultra Windows Energy-Efficient?

Fiberglass windows make a great choice for homeowners who want energy-efficient, environmentally-friendly, and durable windows. Ultra windows are made from glass fibers which is also used in home insulation products making fiberglass windows an energy-efficient choice.

Ultra fiberglass windows don’t conduct heat or cold and they won’t expand or contract like window frames made from other materials. Without frame expansion and contraction, fiberglass windows are less likely to experience seal failure than other types of windows. 

Additionally, Milgard is an ENERGY STAR® partner that offers glass packages specifically created to meet or exceed your local energy criteria so you can feel confident that Ultra windows are energy-efficient.

Milgard Ultra Windows Product Details

Define your home and style with Milgard’s Ultra fiberglass windows. Each window is custom built to order allowing you to mix and match styles and configurations. 


Fiberglass lineals made by Milgard:

  • Resist swelling, rotting, and warping
  • Exterior frame colors available
  • Durable & energy-efficient
  • Protected by a manufacturer’s lifetime warranty


Ultra windows are available with white, harmony, bark, and black bean interiors. The white interior can be paired with white, harmony, bark, or black bean exteriors while harmony, bark, and black bean interiors have color matched exteriors. 

Energy Efficiency

Fiberglass frames have durable and energy-efficient attributes. To ensure your products meet ENERGY STAR® criteria work with an expert to choose the proper glass package. The benefit of working with Ultra frames is that you'll get the most out of your insulated glass unit. Seals on high performance glass eventually fail over time because of contraction and expansion in the frames. Fortunately, this isn’t a problem with Ultra windows because the frames and glass are essentially made of the same material. 


There are two types of locking mechanisms available on Ultra windows. You can choose the standard Positive Action lock (pictured above in white) or a cam lock. Cam locks are found on many windows but don’t offer the easy of Positive Action locks. Both options look beautiful on the window and match the interior color of the frame. 

Milgard Full Lifetime Warranty

  • Milgard will repair or replace any defect in materials or workmanship and will pay the costs of all parts and labor for as long as the purchaser owns the home.
  • This applies to residential products installed after 1/1/2012 in the U.S. and after 1/1/2011 in Canada. Some exclusions may apply.
  • Coverage extends 10 years from the install date of the original warranty to the successive owners, free of charge.

See more on Milgard's website

Although vinyl windows dominate the window market fiberglass windows are gaining popularity particularly among homeowners who value energy-efficient and environmentally-friendly products. 

Brennan Enterprises offers sales and installation services of Ultra windows to North Texas homeowners. For more information give us a call to schedule a free consultation.


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