Fiberglass vs Aluminum Windows: The Difference and Pros & Cons

When it comes to choosing new windows for your home or business, two popular options often come to mind: fiberglass windows and aluminum windows. Both materials offer unique advantages and potential drawbacks, making the decision between them crucial for your property’s aesthetics, energy efficiency, and long-term value.

In this comprehensive guide, Apex Window Werks will explore the key differences between fiberglass and aluminum windows, examining their construction, appearance, durability, maintenance requirements, energy efficiency, cost, and availability.

Aluminum vs Fiberglass Windows: Overview

Before we go into detail, here’s a comparison table outlining the key differences between fiberglass and aluminum windows:

While fiberglass offers excellent insulation and durability, aluminum windows have long been a popular choice due to their strength, low maintenance, and sleek aesthetic. Let’s dive deeper into the pros and cons of each to help you make an informed decision.

What Are Aluminum Windows?

Aluminum windows are produced using two primary methods:

• Extruded aluminum: This process involves forcing heated aluminum through specially shaped dies to create the window frame profiles. Extruded aluminum is known for its strength and is commonly used in window manufacturing.
• Rolled aluminum: This method creates thin sheets of aluminum using rollers, similar to the process used for making aluminum cans. While less common in window production, rolled aluminum may be used for certain components.

It’s worth noting that aluminum-clad windows are also available. They feature a wood core with an aluminum exterior. This option combines the warmth of wood interiors with the durability of aluminum exteriors.

Pros of Aluminium Windows

• Strong and lightweight
• Sleek, modern appearance
• Wide availability
• Recyclable material
• Ideal for large window openings

Cons of Aluminium Windows

• Less energy-efficient without thermal breaks
• Can conduct heat and cold
• Potential for condensation issues

What Are Fiberglass Windows?

Fiberglass windows, also often compared with vinyl windows, are manufactured through a process called pultrusion. This involves pulling glass fibers through a resin bath and then through a heated die, which shapes the material into the desired window frame profile. The result is a composite material that combines the strength of glass fibers with the versatility of plastic resins.

Pros of Fiberglass Windows

• Excellent energy efficiency
• Highly durable and stable
• Low maintenance
• Good insulator

Cons of Fiberglass Windows

• Higher cost
• May have limited color options compared to aluminum
• Can be heavier than some alternatives

How Do Aluminum vs Fiberglass Windows Look?

Both fiberglass and aluminum windows can significantly enhance a property’s curb appeal, but they offer different aesthetic qualities:

Fiberglass Windows

• Can be engineered to mimic the appearance of other materials, including wood
• Offer a wide range of colors and finishes
• Provide versatile design options to suit various architectural styles
• Can feature thicker frames, which may be desirable in certain design contexts

Aluminum Windows

• Known for their sleek, modern appearance
• Typically feature thinner frames, allowing for larger glass areas and more natural light
• Ideal for contemporary or industrial-style architecture
• Available in various colors and finishes, including anodized options

The choice between fiberglass and aluminum often comes down to personal preference and the overall style of your home or building.

Are Aluminum and Fiberglass Windows Long-Lasting?

Both materials are known for their durability, but they have different strengths:

Fiberglass Windows

• Highly durable and resistant to warping, swelling, and rotting
• Can withstand extreme temperatures without compromising structural integrity
• Less prone to expansion and contraction with temperature changes
• Perform well in various climates, including very wet climates

Aluminum Windows

• Extremely strong and resistant to impact
• Do not rust, but may corrode in coastal environments without proper treatment
• Can be more susceptible to denting or bending compared to fiberglass
• May require thermal breaks to address heat transfer issues in extreme temperatures

Both fiberglass and aluminum windows can last 50 years or more with proper care, making them excellent long-term investments for your property.

How Much Do Fiberglass and Aluminum Windows Cost?

The cost of windows can vary widely based on factors such as size, style, and customization options.

However, general cost comparisons can be made:

Fiberglass Windows

• Typically more expensive than aluminum windows
• Often priced similarly to high-end aluminum windows
• Long-term energy savings can offset higher initial costs

Aluminum Windows

• Generally less expensive than fiberglass windows
• More affordable than wood windows
• Cost can increase with additional features like thermal breaks or specialized finishes

While aluminum windows may have a lower upfront cost, it’s important to consider long-term factors such as energy efficiency and durability when making your decision.

Are Aluminum and Fiberglass Windows High-Maintenance?

One of the key advantages of both fiberglass and aluminum windows is their low maintenance requirements:

Fiberglass Windows

• Require minimal upkeep
• Do not need painting or refinishing
• Resistant to fading and chalking
• Easy to clean with soap and water

Aluminum Windows

• Generally low maintenance
• May benefit from periodic lubrication of moving parts
• In coastal areas, may require anti-corrosion coatings or regular cleaning to prevent salt damage
• Easy to clean with mild detergent and water

Both materials offer significant advantages over wood windows in terms of maintenance, making them attractive options for homeowners looking to minimize upkeep.

How Do Fiberglass and Aluminum Windows Compare in Energy Efficiency?

Energy efficiency is a critical factor in window selection, and this is where fiberglass and aluminum windows differ significantly:

Fiberglass Windows

• Excellent insulators due to the properties of fiberglass
• Low thermal conductivity helps maintain indoor temperatures
• Can incorporate insulated pieces for enhanced energy performance
• Often exceed energy efficiency standards

Aluminum Windows

• Naturally conduct heat, making them less energy-efficient without modifications
• Require thermal breaks to improve insulation properties
• Modern aluminum windows with thermal breaks can offer improved energy performance
• May not be the best choice for extreme climates without additional energy-saving features

For homeowners prioritizing energy efficiency and looking to reduce energy costs, fiberglass windows often have an edge over basic aluminum frames.

Are Fiberglass and Aluminum Windows Easy to Find?

The availability of window materials can impact your choices:

Fiberglass Windows

• Increasing in popularity but may be less widely available than aluminum
• May require longer lead times for custom orders

Aluminum Windows

• Widely available from numerous manufacturers
• Extensive options for styles, sizes, and configurations
• Generally easier to source for both residential and commercial applications

While both materials are accessible, aluminum windows may offer more immediate options and greater variety in some markets.

Making the Right Choice: Your Window to a Better Space

When deciding between fiberglass and aluminum windows, your climate, budget, style, and energy goals play key roles. While fiberglass offers excellent insulation, aluminum windows often provide a more attractive balance of aesthetics, durability, and energy efficiency. Their sleek design, strength, and potential for thermal breaks make them a versatile choice for a wide range of homes.

At Apex Window Werks, we understand that navigating these choices can be overwhelming. That’s why our expert team is here to guide you through every step of the process. Whether you’re considering a full window replacement or need repairs for your existing windows, we offer professional Chicago window services.

Get in touch with us today, and let our experienced professionals help you make a clear choice for your windows.