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Fiberglass Window Price Guide

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When it comes to adding new windows to homes, owners have a lot of options to choose from. One of the more popular window options is fiberglass. This has become a popular choice due to its energy-saving properties and strength. Fiberglass windows can be designed in a variety of styles and colors, and they can even be made to mimic the look of wood-framed windows. That being said, these windows are sometimes avoided due to their higher installation costs.

The Costs

  • Maximum: $900 per window

  • Minimum: $200 per window

The costs associated with fiberglass windows are mostly limited to the installation and the windows themselves. The cost of the windows range between $200 on the low end up to $900. Although installation costs will depend on the professional installers, the cost to have these windows professionally installed generally runs between $35 and $100 per window.


The only material required by homeowners to install a fiberglass window is the window itself. Most of the time, fiberglass windows come ready to be installed by a professional. The only other material that homeowners may need is paint if they wish to paint the frame. Unlike a wood window frame, there is no need to treat fiberglass windows because they are not susceptible to rot or decay.

Advantages of Fiberglass Windows 

The major benefits of installing fiberglass windows are their durability and strength. Fiberglass window frames are the strongest available for homeowners. They have a fantastic lifespan, which makes them a very popular option in areas that have harsh climates. Fiberglass is also known for being energy-efficient, so the high cost of installing this type of window eventually pays for itself because the homeowners will save on heating and cooling expenses. In turn, this will also lower the homeowners' carbon footprint, which should make them feel good about their investment.

Unlike wood frames, fiberglass requires very little maintenance. The material can be painted, but it's not required. It should also be noted that fiberglass expands and contracts a lot less than wood. This puts less stress on the actual windows. Just like wood frames, fiberglass is also available in a wide range of colors and styles.

Disadvantages of Fiberglass Windows

The biggest drawback to fiberglass frames is the fact that they are more expensive than wood frames. In general, it's safe to assume that fiberglass windows cost nearly twice as much as traditional windows. Although this price is offset by the energy-saving properties of fiberglass windows, it could still take years for homeowners to break even. Also, fiberglass windows are still not as popular as traditional ones, so finding the perfect style, color and supplier could be more challenging than if homeowners choose to go with a more traditional approach.

Types of Fiberglass Windows

There are many different styles of fiberglass windows available. The style and design that homeowners choose will directly affect the overall cost of installation. Below is a list of the different styles of fiberglass windows currently available on the market.

  • Casement Fiberglass Windows: Casement windows are easy to spot because the windows are attached to the frame by hinges. These hinges are located on either side of the window. This style of window can be used as a single window or paired with another. They tend to be more energy-efficient than traditional windows and are easier for homeowners to clean from the outside by folding the windows inward. The biggest drawback to this style of window is its high price tag.

  • Double-Hung Fiberglass Windows: Just like traditional double-hung windows, double-hung fiberglass windows are made up of two different window panels. Opening and closing the window causes the two different panels to slide up and down each other. This is the most common type of window found in homes across America. One benefit of double-hung windows is the homeowner can choose to ventilate via the top or bottom of the window, depending on which panel they slide.

  • Sliding Fiberglass Windows: Sliding windows are best known for their ability to slide open and closed instead of being fixed to a hinge. Although some open vertically, a sliding window traditionally refers to one that opens horizontally. Due to the way that sliding windows are built, these are a great option for large windows. In fact, sliding windows are often used as patio doors. In general, these types of windows are pretty inexpensive, but the cost of the window is directly affected by its overall size.

  • Awning Fiberglass Windows: These types of fiberglass windows are usually opened using a hand crank. Although this used to be a popular option for windows, the style has recently decreased in popularity. Because this type of window does not require direct force from the user, they are typically easier to open. The crank can be turned using just one hand to open the window. This style is perfect for windows that have furniture in front of them, which prevents homeowners from standing close to the window.

  • Hopper Fiberglass Windows: This is a very versatile style of fiberglass window because it is able to open completely. Using a hinge, the window can open from the top or bottom and lean inward or outward. This makes this style of window perfect for small spaces. Hopper windows were traditionally used in basements and bathrooms while some homeowners even put them on top of traditional windows to increase ventilation.

  • Transom Fiberglass Windows: These are very large windows that can remain stationary to simply let in more light or can be mounted to open like a door for ventilation. Due to the large nature of these windows, they are often extremely expensive and are not commonly found in the average home.

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Last updated on Jun 26, 2014

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