Low-E glass may look just like regular clear glass, but it is engineered with advanced technology that helps buildings stay cooler in summer and warmer in winter. If you’re a glazing contractor, glass fabricator, or general contractor working on energy-efficient projects, understanding how Low-E glass works can give you an edge—and save your clients money.
This article breaks down the science behind Low-E coatings and why they matter in today’s construction market.
What Is Low-E Glass?
Low-E stands for “low emissivity.” This type of glass has a microscopically thin coating—usually made of metal or metal oxide—that reflects heat and ultraviolet (UV) rays. While invisible to the naked eye, this coating acts like a thermal mirror.
Low-E glass helps control how heat and light move through glass without affecting visibility. It still lets natural light in, but it keeps unwanted heat out in the summer and reflects indoor warmth back inside during winter.
This balance of light and heat is what makes Low-E glass a game changer for energy efficiency.
How Does the Coating Work?
The Low-E coating is applied to one of the interior surfaces of an insulated glass unit (IGU). When sunlight hits the glass, the coating reflects infrared (heat) radiation while allowing visible light to pass through. That means less heat enters the building while still providing clear views.
There are two main types of Low-E coatings:
- Passive Low-E (hard coat): Best for colder climates. It allows some solar heat gain to help warm up interiors in the winter.
- Solar Control Low-E (soft coat): Best for hot climates. It blocks more heat and provides stronger energy savings for air-conditioned buildings.
For commercial projects in Texas, Oklahoma, Louisiana, New Mexico, Arkansas, Missouri, and Kansas, Solar Control Low-E is often the better choice due to high temperatures and sunlight exposure.
Benefits of Using Low-E Glass
Low-E glass offers several clear advantages:
- Lower Energy Bills: Reduces the need for heating and cooling.
- Improved Comfort: Keeps indoor spaces at a more stable temperature.
- UV Protection: Blocks most UV rays, protecting furniture, flooring, and merchandise from fading.
- Better Sustainability: Helps meet building codes and green building standards.
- Increased Property Value: Energy-efficient upgrades make buildings more attractive to buyers and tenants.
For commercial storefronts, these benefits translate into long-term cost savings and a more comfortable environment for customers and employees.
Where to Use Low-E Glass
Low-E glass is ideal for:
- Storefronts with direct sun exposure
- Office windows and curtain walls
- Entry doors with large glass inserts
- Retail spaces with display windows
- Schools, hospitals, and public buildings
When paired with the right aluminum framing systems, Low-E glass can meet or exceed energy codes without sacrificing style or performance.
Choosing the Right Low-E Glass
Not all Low-E glass is the same. Be sure to choose the right product based on:
- Climate zone
- Building orientation
- Frame materials
- Type of HVAC system in use
Work with a supplier who understands regional needs and can recommend the best insulated glass units (IGUs) for your specific project.
The Sky Building Materials Difference
At Sky Building Materials, we supply high-performance Low-E glass and IGUs to contractors, window makers, and fabricators across Texas and surrounding states. We stock a wide range of energy-efficient glass options that meet today’s building standards—without compromising clarity or appearance.
If you’re working on a storefront, commercial space, or residential development that demands energy performance, Low-E glass is an easy and effective solution.
Need help choosing the right Low-E product?
Visit our Sky Building Materials Contact Page or check out real-world applications on our Sky Building Materials Facebook Page.