Photo: Quaker Residential Windows + Doors
Windows are more than just architectural features—they’re precision-engineered building products that play a critical role in energy efficiency, durability, and aesthetics. While many windows may look similar at first glance, there can be significant differences between manufacturers in terms of materials, construction quality, and performance.
When selecting windows for a building project, it’s essential to look beyond appearances. Paying close attention to the type of window, the materials used, and how they’re built can help ensure long-term satisfaction—for designers, builders, and property owners alike. The right choice will provide not only energy savings and comfort from day one, but also lasting performance for years to come.
At the core of every window are two main components: the glass and the frame, including any operable sashes. These elements vary widely in how they’re manufactured, treated, and assembled—and those differences directly impact both how a window looks and how it performs. Below, we’ll break down the most important details to understand when evaluating window products for energy performance.
Double-Hung Windows by Marvin Windows and Doors
Picture Window by Marvin Windows and Doors
The Glass: More Than Just a View
Most window manufacturers start with glass from global suppliers and customize it through cutting, coating, and assembly into Insulating Glass Units (IGUs). These units typically consist of two or three panes separated by spacers (stainless steel for strength, nylon for better thermal performance) and filled with inert gas like argon to reduce heat transfer.
Common glass types include:
Float Glass – Flat, clear, and available in various tints and thicknesses.
Annealed Glass – Standard glass that’s easy to cut and shape.
Low-E Coated Glass – Reflects heat while allowing light in, improving insulation.
Tempered & Heat-Strengthened Glass – Safer and stronger, often required by building codes.
Laminated Glass – Like car windshields, it holds together on impact and helps reduce noise.
Beyond the Glass: Frames, Sashes, and Seals
A window’s performance also depends on how well it’s built and what it’s built with:
Frame Materials – Wood offers classic beauty but needs maintenance. Aluminum is durable but less efficient. Vinyl and fiberglass offer great energy performance and minimal upkeep. Some products blend materials for the best of both worlds.
Window Types – From casements and awnings to sliders and tilt-turns, the style affects both look and performance. Hinged windows often seal better than sliding ones.
Finishes – Choose from pre-finished or customizable paint/stain options depending on the material and desired look.
Gaskets & Hardware – These small details are big on function. Durable gaskets and quality locking hardware improve insulation, reduce drafts, and boost security.
Color and hardware options by Marvin Windows and Doors
CityLine® Window illustration of Quaker’s patented OptiCore®
Conclusion: Choose Smart
Windows aren’t one-size-fits-all. The right combination of glass, frame, and design features can boost your home’s comfort, efficiency, and value. Work with your window manufacturer to match the right options to your project’s needs and energy goals.
See the Difference in Person
Visit select Mead Lumber and Knecht Home Center showroom locations to explore window styles, frame finishes, and glass types firsthand. Our knowledgeable staff is ready to help you compare features, understand energy performance ratings, and find the perfect fit for your home or building. Whether you’re a homeowner, builder, or designer, we’re here to guide you every step of the way.
Andersen A-series Picture Windows
Kitchen Windows by Vector Windows
Find Your Nearest Mead Lumber/Knecht Home Center Window Showroom
With trusted brands, a wide variety of styles, and the professional guidance of our experienced windows experts, Mead Lumber/Knecht Home Center is the perfect partner for your home renovation project.
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