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Gas-Filled Glass vs Spandrel Glass: Which Is Better?

Key Takeaways

  • Gas-filled glass offers superior insulation and energy efficiency, making it ideal for climates with extreme temperatures.
  • Spandrel glass is highly customizable, cost-effective, and perfect for concealing structural elements in building facades.
  • While gas-filled glass has higher initial costs, it can lead to significant energy savings over time.
  • Spandrel glass is durable and safe, but it provides less insulation compared to gas-filled glass.
  • Choosing the right type of glass depends on the specific needs of the project, including design, budget, and performance requirements. Panda Windows & Doors offers customizable glass solutions to meet your needs.

Gas-Filled Glass vs Spandrel Glass: An Overview

Gas-filled glass is designed primarily for insulation purposes. 

It consists of two or more glass panes separated by a space filled with an inert gas like argon or krypton. This gas layer enhances the thermal performance of the glass by reducing heat transfer. Due to its insulating abilities, gas-filled glass is commonly used in windows, doors, and other transparent applications where insulation and energy efficiency are crucial.

Spandrel glass, on the other hand, is designed to be opaque. It is used to conceal structural elements, mechanical equipment, or floor slabs in buildings, preventing them from being seen outside. The glass can be coated in various materials to achieve different colors and finishes, making it a versatile choice for enhancing building facades.

Main Differences Between Gas-Filled & Spandrel Glass

What sets the two glass types apart is their functionality. 

Gas-filled glass is designed to optimize insulation and energy efficiency, while spandrel mainly serves an aesthetic purpose. 

Another distinctive feature is that gas-filled glass is usually transparent, whereas spandrel glass is opaque.

An image which shows how gas-filled glass works.

Here’s how a double-pane gas-filled glass works (courtesy of coszyhomes windows).

Advantages of Gas-Filled Glass

  • Gas-filled glass reduces heat transfer, keeping your indoor spaces warmer in winter and cooler in summer, making it ideal for extreme climates.
  • By minimizing heat transfer, gas-filled glass can lower your energy bills by up to 25% and contribute to a more sustainable environment.
  • The gas layer in gas-filled glass effectively dampens noise, making it an excellent choice if you live in a noisy urban area or near busy roads.

Disadvantages of Gas-Filled Glass

  • Gas-filled glass is more expensive to purchase upfront, but long-term energy savings can offset this investment.
  • The glass may experience leakage over time if seals fail, reducing insulation effectiveness.
  • Gas-filled glass prioritizes function over aesthetics, offering limited design customization options compared to other glass types.

Founded in 1991, Panda Windows & Doors specializes in state-of-the-art custom glass wall systems for both residential and commercial spaces through Panda Windows & Doors. Operating from our manufacturing facility in Las Vegas, Nevada, we have been at the forefront of innovation for over 30 years. Our extensive product lineup includes over 80 high-end offerings, such as pivot doors, French doors, folding doors, lift & slides, multi-slides, horizontal sliding walls, and operable windows. These systems are available in materials like aluminum, steel, stainless steel, bronze, solid wood, and aluminum-wood clad.

We are renowned for our award-winning designs, engineering solutions, and fast lead times, delivering in just 6-10 weeks to customers throughout the U.S. and Caribbean. Trusted by leading architectural firms and glaziers nationwide, we stand as the premier manufacturer of custom luxury windows and doors in the United States.

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Pros of Spandrel Glass

  • Spandrel glass offers versatile design options, including colors, patterns, and finishes, to match your building’s aesthetic needs.
  • Spandrel glass products are generally less expensive to manufacture and install than gas-filled glass, providing great value for the investment.
  • The glass meets strict safety standards, is highly durable, and can withstand various environmental conditions, making it a safe choice for residential and commercial buildings.

Cons of Spandrel Glass

  • Spandrel glass has lower thermal insulation properties compared to gas-filled glass, making it less suitable for areas where energy efficiency is a priority.
  • It can be challenging to color-match spandrel glass with vision glass, potentially leading to visual inconsistencies in the building facade.
  • Since the glass is opaque its use is often limited to areas where visibility is optional and may require careful management to achieve desired aesthetic and functional outcomes.

Gas-Filled Glass vs Spandrel Glass

So how does gas-filled glass compare against spandrel glass? Let’s find out:

Energy Efficiency

If you want a more energy-efficient glazing solution, gas-filled glass is your best bet. The inert gas between the panes minimizes heat transfer, which leads to better insulation and lower energy costs. Spandrel glass, on the other hand, does not provide the same level of thermal performance.

Costs

While gas-filled glass offers excellent performance, it comes at a higher initial cost. The materials and specialized manufacturing process make it more expensive than spandrel glass.

Installation & Maintenance

Both gas-filled glass and spandrel glass require professional installation to ensure optimal performance. Gas-filled glass, with its multiple panes and gas-filled cavities, may require more specialized installation techniques. 

Maintenance for gas-filled glass primarily involves checking for seal integrity to prevent gas leakage. Spandrel glass, being less complex, typically requires less maintenance, focusing mainly on cleaning and occasional inspections for damage.

Aesthetics

Aesthetically, spandrel glass offers greater flexibility with its range of colors, patterns, and finishes, which makes it ideal for creating visually striking facades. Gas-filled glass, while transparent, can be combined with various coatings and tints to achieve different looks.

Spandrel glass facade for commercial building (courtesy Vecstock).

The choice between the two will largely depend on the design goals and the desired visual impact you intend to achieve.

Ideal Use Case of Each Glass Type

Gas-filled glass is best suited for applications where insulation and energy efficiency are critical. This includes:

  • Residential windows and doors in climates with extreme temperatures
  • Commercial buildings aiming for energy efficiency certifications
  • Spaces requiring sound insulation, such as offices near busy roads

Best Situations to Use Spandrel Glass

Spandrel glass is ideal for projects where aesthetics and cost-effectiveness are key considerations. It works well for:

  • Building facades that need to conceal structural elements
  • Projects with tight budgets that still require a polished look
  • Designs that benefit from customizable colors and finishes

Considerations for Architects and Designers

When selecting between gas-filled glass and spandrel glass, architects and designers should consider the following:

  • Project budget and long-term energy savings
  • Design goals and aesthetic requirements
  • Climate and insulation needs
  • Maintenance and durability expectations

Comparison

Gas-Filled Glass

Spandrel Glass

Energy Efficiency

– Significantly enhances thermal insulation due to inert gases between panes

– Reduces heat transfer, helping maintain consistent indoor temperatures and lower energy bills

– Can improve energy efficiency by reducing solar heat gain and glare

– Primary function is concealing structural elements, not providing insulation

Costs

– Higher upfront cost compared to standard air-filled windows due to advanced technology

– Can lead to significant long-term energy savings, making it a worthwhile investment

– Cost can vary depending on design and materials used

– Generally considered cost-effective for achieving aesthetic goals while providing functional benefits

Installation & Maintenance

– Requires professional handling to ensure proper sealing and gas filling

– Relatively low maintenance, but gas leakage over time can reduce performance and necessitate replacement

– Installation can be complex due to integration with the building façade

– Proper installation is crucial to avoid thermal stress and condensation issues

– Maintenance may involve cleaning to prevent stains and ensuring backing materials are intact to avoid moisture problems

Best Situations to Use

– Ideal for residential and commercial windows in climates with extreme temperatures

– Effective in energy-efficient retrofits and high-performance structures seeking LEED certification

– Best used in commercial buildings to conceal mechanical systems, structural supports, or floor slabs

– Ideal for high-rise buildings and architectural designs where transparency is not necessary

Gas-filled glass vs spandrel glass comparison table.

Choose Panda Windows & Doors For Your Glass Designs

At Panda Windows & Doors, we’ll work with you to bring your vision to life. We have been doing this for over three decades – that is, supplying custom door and window solutions to builders and homeowners. When you partner with us, you’ll get:

  • High-quality gas-filled and spandrel glass that meets the highest industry standards.
  • Professionally crafted glazing solutions that are as functional as they are aesthetically pleasing.
  • Exceptional support from our dedicated team to make the entire process, from the design to the delivery of your custom door & window solutions, seamless.

Contact us to find out more about our bespoke windows and doors for your home or business today!

Frequently Asked Questions

What Makes Gas-Filled Glass More Efficient?

Gas-filled glass is more energy efficient because of the inert gas between the panes which reduces heat transfer, providing better insulation and lowering energy costs.

Can Spandrel Glass Be Used for Insulation?

While spandrel glass is primarily used for aesthetic purposes and to conceal structural elements, it does not offer significant insulation properties compared to gas-filled glass.

How Does the Cost of Gas-Filled Glass Compare to Spandrel Glass?

Gas-filled glass generally has a higher initial cost due to its advanced manufacturing process and materials. However, it can lead to long-term energy savings. Spandrel glass is more cost-effective upfront, making it suitable for budget-conscious projects.

What Maintenance Does Each Type of Glass Require?

Gas-filled glass requires regular checks for seal integrity to prevent gas leakage. Spandrel glass is low maintenance, primarily needing cleaning and occasional inspections for damage.

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