What product lines are made of fiberglass?

Pella® Impervia® is the only product line made of our proprietary fiberglass. This product line offers windows and sliding patio doors. There are also many front entry doors available in fiberglass.

How long do fiberglass windows last?

There are many factors that affect the actual long-term performance, appearance and functionality of fiberglass windows, but Pella's fiberglass windows are designed for a lifetime of everyday use.

What is the most durable window?

Pella’s proprietary fiberglass is the strongest material for windows, engineered for lasting durability.61 Our exclusive fiberglass will never rot or corrode, and it resists dents, bends and breaks.

Fiberglass Windows

Dark bronze double-hung window frame with two sashes and central latch, isolated on white background

Why choose fiberglass windows?

Trusted in tools, boats, bridges and more, fiberglass is a naturally strong and durable material, making it a superior choice for windows. Pella’s proprietary fiberglass material is the strongest material for windows, engineered for lasting durability.⁹ Our exclusive fiberglass will never rot or corrode, and it resists dents, bends and breaks.

Fiberglass window benefits

verified Durable and Strong

The best fiberglass windows for your home are incredibly strong and durable. Resisting dents, bends and breaks, fiberglass window frames have virtually no expansion and contraction to help improve energy efficiency, reduce the risk for seal failure and provide long-term stability for dependable operation.

sunny_snowing Weather Resistant

Fiberglass is designed to provide outstanding resistance to water, wind and outside noises. It can withstand large temperature swings and the rigorous performance requirements of a commercial building.¹⁵

thumb_up Maintenance-Free

Durable fiberglass material will never rot or corrode and is naturally resistant to water and bugs. It resists chipping, chalking and fading - so you never need to paint or refinish your fiberglass windows.

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Pella's Fiberglass

What makes Pella's fiberglass different from the competition.

1
The Strongest Material for Windows⁶¹
Pella's fiberglass is the strongest material for windows, engineered for lasting durability.⁹ Our fiberglass windows are designed and tested for a lifetime of everyday use.
2
Won't Dent, Bend or Break
Our proprietary fiberglass won’t dent, bend or break as much as the competition. It is a thermoset material, meaning it won’t melt or breakdown when exposed to environmental temperature swings and can handle the most extreme heat and cold.³²
3
Heavy-Duty, Powder-Coat Finish
Factory-applied and baked on, our long-lasting powder-coat finish resists chipping, chalking and fading – even in dark colors – for enduring beauty.

Pella vs Competitors

Want to know more?

Learn more about our proprietary fiberglass material and see how we stack up against the competition.

Pella vs Competitors

Fiberglass Product Lines

Pella® Impervia® Fiberglass Windows

Made of proprietary fiberglass
Unmatched strength and lasting durability⁹
Sleek, timeless style
Exceptionally energy efficient

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Fiberglass Windows

Pella Impervia

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Fiberglass Window Tips & Advice

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Fiberglass Window Projects

Browse through our projects to view our windows used in real life and see the difference a new window can make on your home.

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Frequently Asked Questions

What are the benefits of fiberglass windows?

Pella’s proprietary fiberglass is the strongest material for windows, engineered for lasting durability.⁹

Are fiberglass windows efficient?

Yes, Pella's fiberglass window frames have virtually no expansion and contraction to help improve energy efficiency, reduce the risk for seal failure and provide long-term stability for dependable operation. In addition to the material of the window frame, glass types and coatings also affect the energy efficiency of a window.

Are fiberglass windows better than vinyl?

It depends what benefits are most important to you. Pella's fiberglass is the strongest material for windows, offering a low-maintenance and durable finish.⁹ If you're after a window that's tested to extremes, Pella's fiberglass windows are the way to go. Vinyl windows are easy to care for, energy efficient and budget friendly. Pella’s unique vinyl formula is performance-tested for excellent weathering, durability and color retention.

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