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Fiberglass VS Vinyl Windows

Fiberglass Vs. Vinyl Windows For Your Topeka, KS, HomeWhy Fiberglass Is The Obvious Choice Over Vinyl For Your

Fiberglass VS Vinyl Windows

Fiberglass Vs. Vinyl Windows For
Your Topeka, KS, Home

Why Fiberglass Is The Obvious
Choice Over Vinyl For
Your Windows

Choosing the right replacement windows for your Topeka, KS, home is essential to getting the best value for your investment. You’ve probably heard of fiberglass and vinyl windows, but you may not know what the difference is between the two. They’re two of the industry’s leading options for replacement windows and have some similar characteristics.

To help you make the most educated decision on your new windows, we’ll break down fiberglass vs. vinyl windows and explain why one is better.


While fiberglass and vinyl are more durable than wood alternatives, they are by no means equal. While both options resist rot and decay, fiberglass windows can be up to 9 times stronger than vinyl.

High-quality vinyl windows may last up to 30 years, while their fiberglass counterparts can be in place on your house for more than 50 years. While neither option requires much maintenance, proper care will see the longest lifetime for each.

Part of the reason behind the durability of fiberglass is that it is made from glass. This means that when the temperature changes, the frame and the glass will expand or contract at the same rate, decreasing the likelihood of seal failures.

On the other hand, vinyl windows have welded corner seams, which is typically the location of their seal failures. Because the vinyl does not contract or expand at the same rate as the window, these windows are more susceptible to these failures and may require periodic caulking.

A fiberglass frame is also more rigid than a vinyl frame, so your fiberglass replacement windows will never warp or twist, unlike vinyl.


If you’re looking for decorative options, you won’t find as many with vinyl windows. Both options have various color choices, but fiberglass can be painted while vinyl cannot. This opens up a world of possibilities for fiberglass replacement windows that are unavailable for vinyl windows. Fiberglass can also be given the textured look of wood, while vinyl is smooth.

Another difference is the size of the frames. Because fiberglass is stronger, less is needed to hold the glass panes in position. This allows for a better view through the window and more light to enter the room where the window is placed.

Energy Efficiency

While vinyl and fiberglass windows offer increased energy efficiency, fiberglass is the better choice. The glass fibers that make up the material do not readily expand or contract with heat or cold, making them poor thermal conductors and slightly better at insulating than vinyl.

Additionally, fiberglass offers better noise insulation, keeping the neighborhood sounds outside.

Environmental Impact

Vinyl windows are made of PVC, which is generally very hard to recycle once the window reaches the end of its life. Fiberglass windows, however, are made from up to 60% recycled glass, making them more environmentally friendly.


While both window options are less expensive than wood, vinyl costs much less than fiberglass – generally 10 to 30% lower. Installation of fiberglass windows is also more costly than that of vinyl windows.

Installation Options

Many DIYers who are ready to take on a challenge can tackle the installation of vinyl windows. They are generally easy to handle, and installing them is straightforward. On the other hand, fiberglass windows are incredibly rigid, which makes them so strong. Because of this, trained professionals must install them for you to prevent damage.

Attempting to install your own windows may also result in a voided warranty. You will want to review the terms before undertaking a DIY task.

Are Fiberglass Windows Better Than Vinyl?

Overall, fiberglass windows top vinyl. Despite the higher upfront investment and need for professional installation, fiberglass windows are better because they offer greater durability, a longer lifespan, more variety, greater energy efficiency, and a better environmental impact.

Choose Midland Exteriors For Your Fiberglass Replacement Window Needs In Topeka, KS

Choose the leading exterior remodeling company in Topeka, KS, for your replacement window project. Here at Midland Exteriors, we provide impeccable installations on every project.

Our factory-trained in-house installers are exceptionally talented and passionate, providing fantastic results on every window installation they complete.

Call us today at (855) 735-8255 to schedule your free estimate.

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Our Kansas Locations

Kansas City Location
(913) 382-2031

19915 W 161st Street, Suite B Olathe, KS 66062

Manhattan Location
(785) 336-5887

8226 South Port Drive Manhattan, KS 66502

Topeka Location
(785) 336-5885

4121 SW Twlight Dr Topeka KS 66614