Best Window Glass for Energy Efficiency | Guide for Contractors

Understand Low-E coatings, Argon gas, and U-values. This window glass guide helps contractors choose the right energy-efficient options for every build.

Choosing the Right Window Glass: What Contractors Need to Know

Window style is only half the battle. Glass performance—especially in today’s energy-conscious market—is what separates average builds from great ones. Homeowners care about comfort and utility bills. Developers care about long-term ROI. And as the supplier, we care about getting you both what you need.

Here’s what every builder should know:

1. Low-E Glass (Low Emissivity)

Best for: Energy-efficient homes, any climate

• What it does: Reflects infrared and UV light while letting in visible light

• Why it matters: Keeps homes warmer in winter, cooler in summer

• Pro Tip: Choose different Low-E levels depending on your region’s climate zone

2. Argon Gas-Filled Windows

Best for: All builds looking to reduce energy transfer

• What it does: Fills the space between double or triple panes

• Why it matters: Minimizes heat transfer and adds sound insulation

• Pro Tip: It’s a solid upgrade without a huge jump in cost

3. Double-Pane vs. Triple-Pane Glass

Best for: Northern climates, custom or luxury builds

• Double-pane: Energy efficient and affordable

• Triple-pane: Best performance, especially in cold regions

• Pro Tip: Don’t oversell triple-pane in mild climates—it can reduce natural solar gain

4. U-Value and SHGC

• U-Value: Measures heat loss. Lower = better insulation

• SHGC (Solar Heat Gain Coefficient): Measures solar heat gain. Lower = better for hot climates

• Pro Tip: Always balance U-value and SHGC depending on your climate

Local Window Glass Experts You Can Trust

At Invisible Windows & Doors, we supply top-quality insulated glass windows with Low-E and Argon options always tailored to your budget and build location. Whether you’re a contractor, developer or homeowner, we’ll guide you to the right specs.

Need help choosing energy-efficient windows for your next project?

Contact us now for fast pricing and expert insight across the whole East Cost!