Fiberglass Replacement Windows

Why choose fiberglass?

Fiberglass windows from Pella offer strength and durability with the ability to withstand extreme temperatures. Fiberglass is a low-maintenance material with a quality look. Choose your window style and enjoy the quality look and energy efficiency of fiberglass.

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Used in a range of commercial and industrial items, fiberglass is a naturally strong material, making it a great option for windows. In fact, Pella’s proprietary fiberglass material is the strongest material for windows.* In addition to its strength, fiberglass is long-lasting, low-maintenance, and resistant to the chipping, chalking, and fading. This window material doesn't expand or contract when the weather changes and acts as an insulator, giving you a long-term energy-efficient window frame.

Fiberglass windows are:

Durability
Maintenance-free
Weather resistant

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Behind the Strength of Pella’s Proprietary Fiberglass

Pella's proprietary fiberglass material is the strongest material for windows and patio doors, engineered for lasting durability.*

*Disclosure: Pella’s proprietary fiberglass material has displayed superior strength over wood, vinyl, aluminum, wood/plastic composites, and other fiberglass materials used by leading national brands in tensile and 3-point bend tests performed in accordance with ASTM D638 and D790 testing standards.

Explore Your Options With an Expert

Expert craftsmanship takes expert product knowledge. A Pella windows and doors expert can help you pick out the window that fits your home — and your style. Find your local Pella representative to schedule a free in-home consultation, measurement, and estimate. Or visit your nearest showroom for a guided tour of your options. No pressure. No cost to you.

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