Fiberglass windows are a great option for homeowners who are replacing wood windows and want something with a similar look, but without the maintenance requirements and susceptibility to rotting over time.

Fiberglass is an incredibly durable and strong material from which to construct windows, allowing for narrower profiles without compromising strength and rigidity. A wide variety of color options and divided lite combinations, allow you to create the perfect look for your home.

The Benefits of Ultra Fiberglass Replacement Windows


Fiberglass is a thermally set product, meaning that it will not change shape in the hot Texas heat. Unlike vinyl windows, fiberglass windows will not bow, sag, or warp during the hot summer months. Furthermore, because of their stability, fiberglass windows continue to operate and look as smoothly in 10 years as they did on the day they were installed.


Fiberglass windows are not damaged or degraded from moisture, as wood windows are. No more worries about rotting wood windows. Even the extreme combination of heat and humidity in Houston is no match for fiberglass windows.


Fiberglass windows are pre-painted with a heavy duty, baked on enamel paint – straight from the factory. As a result, you’ll never have to scrape and paint your windows again. However, should you choose to change colors, feel free to paint your windows any color you wish.


Fiberglass windows are available in five standard colors or unlimited custom colors. Choose from grids between the glass, no grids, or simulated divided lites on the glass to give your home just the right look.


Fiberglass windows offer narrower frames and sashes than vinyl, providing the upscale look of wood. Stainable interiors are available to match the look of wood paneling.


Fiberglass windows are among the most energy efficient windows in the industry. Because of its low rate of contraction and expansion, the air leakage rating of a fiberglass window will remain consistent over time. Ultra’s fiberglass windows have the lowest air leakage rating of any fiberglass windows in the industry and one of the highest design pressure ratings on the market.