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Comparing Fiberglass vs. Wood Windows

Comparing Fiberglass vs. Wood Windows

Whether your client has a modern or traditional home, wood and fiberglass windows are a great fit. Learn about the differences so you can help them choose between the two materials.

Architectural Style

When deciding between fiberglass and wood windows, it’s smart to consider your project’s architectural style.


Steel windows are well-suited for contemporary homes, but they also have a high price tag. You can reach a similar look with Pella® Impervia® fiberglass windows, which feature sleek profiles and clean lines. They’re available in an up-to-date color palette including black. With optional between-the-glass grilles and supplemental hardware, you’ll be able toaccomplish your design vision.

Working with a client who prefers the beauty and warmth of wood? There’s a modern window for them in either the Pella® Reserve™ or Pella Architect Series® collection. These windows feature expansive glass with minimalist finishes.


Wood windows are a timeless style for traditional homes. When your clients prefer something highly customizable, Pella® Lifestyle Series is a great fit. These windows offer style flexibility plus exceptional performance options and 37 time-tested purposeful innovations.

When you have a client who wants wood windows that stand out, take a look at the traditional Pella Architect Series. These windows feature finely detailed grilles and sashes, timeless style and the best limited lifetime warranty for wood windows.1


Wood is a premium window material. While cost depends on your specific project, wood windows are typically more expensive than fiberglass.


From grilles to hardware and glass options, both fiberglass and wood windows can be extensively customized. However, there are several more additional features available for wood windows, such as our integrated blinds and shades in Pella Lifestyle Series. These window treatments are tucked between the glass, which keeps them away from fingerprints and allergens.

Energy Efficiency

Wood windows are incredibly energy efficient. In fact, our Pella Lifestyle Series windows are available in styles that meet or exceed ENERGY STAR® guidelines in all 50 states.3 Your clients can customize their energy efficiency with glass windows like triple panes or dual panes with insulating argon gas.

Fiberglass doesn’t expand or contract as temperatures change, so the frame isn’t susceptible to cracking or gapping. Your clients can also customize it with energy-efficient dual and triple-pane glass options with argon to slow heat transfer.


Fiberglass is an extremely sturdy material. It won’t rot or corrode, and it naturally resists water and bugs. Impervia windows have been tested in -40oF to 180oF and meet strict performance requirements for commercial buildings.2

Wood windows have stood the test of time, as they’ve been used for hundreds of years. We treat ours with the exclusive EnduraGuard® formula, which delivers lasting protection on every surface. Then, we finish them with strong extruded aluminum or aluminum cladding to protect the exterior.


Fiberglass windows are the lowest-maintenance option. Impervia is finished using a heavy-duty powder coat finish that stands up to chipping, chalking and fading. These windows won’t ever need to be painted or refinished.

The outside of our wood windows is enclosed by extruded aluminum or aluminum cladding, depending on the product line your clients choose. This greatly lowers the upkeep they’ll need to do. For the interior side of the window, they can decide between factory-prefinished stains and paints, or stain and paint the windows themselves.

Partner with Us on Your Window Project

Whether your project involves replacement windows or custom windows for new construction, the pros at Pella of Kingston can help. We understand it’s not just your project on the line. It’s also your name and reputation. Call us at 845-663-1025 or stop by our showroom to get your free quote today.

1Based on comparing written limited warranties of leading national wood window and wood patio door brands. See Pella written Limited Warranty for details, including exceptions and limitations, at or contact Pella Customer Service at 877-473-5527.

2Pella Impervia windows and patio doors have a performance grade of LC or higher. For information on product ratings see

3Some Pella products may not meet ENERGY STAR® guidelines in Canada. For more information, contact your local Pella sales representative or go to

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