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Fiberglass Windows

Boost curb appeal and energy efficiency with new fiberglass windows from top brands like Andersen and Pella.

All About Fiberglass Windows

If you own a home in the Delaware Valley or surrounding areas and would like to replace your windows, Energy Windows Doors and More recommends fiberglass windows from top brands like Andersen and Pella. Energy is a trusted window installation contractor that offers premium windows at competitive prices.

Fiberglass windows differ from traditional windows in that the exterior is framed with fiberglass as opposed to wood while the interior generally uses either real wood or a wood veneer for that classic, homey look and feel. Manufacturers create fiberglass by combining glass fibers and resin—and not all fiberglass is the same. Fiberglass formulas are complex, often proprietary, and typically adjusted based on the application.

Fiberglass vs. Other Window Materials

A great advantage of fiberglass windows, particularly when replacing many or all of a home’s windows, is cost. While fiberglass does tend to be a bit more expensive than vinyl, it’s typically less expensive than wood, clad, and composite windows.

A fiberglass window outperforms a wood window and performs similarly to an aluminum-clad wood window at a much lower cost. Fiberglass is similar to vinyl in that it will never rot and requires little to no maintenance, but it is also notably stronger and provides better impact resistance. Fiberglass windows are environmentally friendly, enhance property value, and dampen outside noises.

Why Choose Fiberglass?

Fiberglass windows offer an exceptional combination of strength, energy efficiency, low maintenance, and environmental responsibility—all at a competitive price point.

Superior Strength & Durability

Fiberglass is notably stronger than vinyl and provides better impact resistance. It will never rot and requires little to no maintenance over its long lifespan.

ENERGY STAR Certified Options

Many of the fiberglass windows we offer are ENERGY STAR certified, giving you confidence in performance and potential eligibility for energy incentives to help offset your investment.

Environmentally Friendly

Fiberglass windows are made primarily from sand, an abundant and easily recycled resource, and energy consumption during manufacturing is relatively low.

Competitive Pricing

While slightly more expensive than vinyl, fiberglass is typically less expensive than wood, clad, and composite windows—offering outstanding value for the performance you receive.

Noise Dampening

Fiberglass windows enhance property value and dampen outside noises, creating a more peaceful and comfortable home interior.

Full Range of Styles

Fiberglass windows are available in double- and single-hung, casement, awning, bay, bow, picture, slider, garden, custom, and specialty styles.

Signs You Should Replace Your Windows

Age is the most important factor—your goal should be to replace existing windows as they reach the end of their expected lifespan and before you deal with issues like reduced energy efficiency. Watch for air leaks, as those not only diminish comfort in the home but can cost you big in heating and cooling.

Replace the weatherstripping, and if that upgrade doesn’t eliminate the draft, replace the window. Energy also recommends replacing windows that are difficult to open and close or that are no longer secure, and you should replace windows with any non-superficial damage to either the frame or glass.

Reviews

Frequently Asked Questions

Fiberglass is a fiber-reinforced plastic created by combining glass fibers and resin. The formulas are complex, often proprietary, and adjusted based on the application. The exterior is framed with fiberglass while the interior generally uses real wood or a wood veneer for a classic look and feel.

Fiberglass is similar to vinyl in that it will never rot and requires little to no maintenance. However, fiberglass is notably stronger, provides better impact resistance, and outperforms wood windows thermally. Fiberglass tends to be slightly more expensive than vinyl but less expensive than wood, clad, or composite options.

Yes. Fiberglass windows are among the most energy-efficient options available. Many of the windows we offer are ENERGY STAR certified, which may also make you eligible for energy incentives that help offset the initial investment.

We partner with leading window brands including Andersen and Pella for fiberglass windows. We also offer other materials from brands like Ideal, Interstate, and ProVia, with options including wood, vinyl, composite, and aluminum.
Replace windows as they reach the end of their expected lifespan, when you notice persistent air leaks that weatherstripping doesn’t fix, when windows become difficult to open and close, when they’re no longer secure, or when there’s non-superficial damage to the frame or glass.

Trust Energy for Your New Fiberglass Windows

Count on Energy to help you choose the perfect fiberglass windows for your home and deliver a professional and lasting finish at a fantastic price.

Contact us today to schedule an on-site consultation or with any further questions about your window installation and replacement options.