baydee Door and window picture

Fiberglass windows have become a popular option for homeowners due to their durability, energy efficiency, and low maintenance. However, like any other product, fiberglass windows do come with some disadvantages worth considering before making a purchase decision.

High Costs

Fiberglass windows are typically more expensive than other materials like vinyl and wood. In addition, due to the complexity of installation, the cost can become relatively high. This high cost makes it difficult for some homeowners to opt for fiberglass windows, and they may instead choose a more affordable option.

Limited Colors and Designs

When compared to other materials like wood and vinyl, fiberglass windows offer limited options for colors and designs. While it’s possible to get a wide variety of colors, they are generally more expensive than standard finishes. Additionally, unlike wood windows, fiberglass cannot be painted, which limits the flexibility of the homeowner should they want to change their home’s appearance.


Although fiberglass windows are strong and durable, they are still more likely to break than vinyl or wood windows. Fiberglass windows can crack or chip upon impact, requiring expensive repairs or replacement of the entire unit. This potential fragility can make fiberglass windows less appealing to homeowners who live in areas that experience extreme weather conditions.

Requires Professional Installation

Fiberglass windows require professional installation since they are often custom-made to fit the specific dimensions of the homeowner’s window openings. Improper installation can lead to air leaks, water damage, and decreased energy efficiency. This necessary professional installation increases the overall cost, which makes it less affordable for those homeowners who prefer to do DIY projects around their homes.

Limited Availability

While fiberglass windows continue to gain in popularity, they are still not as readily available compared to vinyl and wood windows. This limited availability can make it difficult for homeowners to find the right product that suits their preferences regarding design and color.

Prone to Fading

Fiberglass windows are generally treated with a UV-resistant coating to protect them from the sun’s harmful rays. However, over time, this coating may wear off, leading to accelerated fading. Unlike vinyl windows, which are available in non-fading colors, homeowners with fiberglass windows may have to replace their windows frequently to maintain their home’s appearance.

In conclusion, although fiberglass windows have many advantages, such as energy efficiency and durability, they are not without their disadvantages. These disadvantages include high costs, limited availability, and potentially fragile materials. It's important to carefully consider these disadvantages when deciding whether fiberglass windows are the right choice for your home.