Skip to main content

Common Misconceptions About Low-E Glass Windows

home with vinyl siding 4000 series energy plus finish
Publish date
Reading time
5 min read

In this blog:

Low-E glass windows combine microscopic coating technology with energy-saving performance to keep homes comfortable and lower energy costs.

  • Low-emissivity glass utilizes an invisible, microscopic metallic coating to block harmful UV rays and preserve indoor temperatures without darkening living spaces.
  • Rather than only benefiting cold seasons, Low-E glass delivers year-round thermal control by retaining warmth during winter and reflecting unwanted solar heat in summer.
  • Upgrading to multi-layered Low-E glass offers a high return on investment through reduced energy bills and fade protection for furniture and walls.
  • Maintaining Low-E glass requires no specialized routines or harsh chemicals. Standard household glass cleaners keep the panes clear and functional.

If youโ€™re shopping around for replacement windows for your Denver-area home, youโ€™ve probably heard a lot of different pros and cons for various types of windows, especially between competing companies. That can majorly complicate your decision, especially when your home is racking up more expensive monthly utility bills thanks to the energy loss from your current windows! Weโ€™ll define our windowsโ€™ glass component, Low-E glass, and debunk some myths you may be hearing during your window buying process.

What is Low-E Glass?

The glass in your windows makes a bigger impact on your homeโ€™s comfort than you may think! Low-E, or low-emissivity, glass has two big net positives: it shields your home from the sunโ€™s harmful UV rays and helps keep your home a more comfortable temperature year-round, both of which lead to lowered monthly energy bills.

Low-E glass is treated with a microscopic metallic coating designed to filter out UV light that would otherwise enter your home, leading to faded furniture and wall paints.

Black bay window from Window World

Myth vs. Fact: The Truth About Low-E Glass

Letโ€™s unpack some of the common myths you may hear about Low-E glass and lay out the truth of what you can expect from Window World replacement products.

Myth 1: Low-E Glass Only Saves Energy in Cold Seasons

You may have heard that Low-E glass is only effective in colder climates since it traps heat from the sun inside your home, helping to keep your home toasty warm in the winter. Thatโ€™s only a partial truth, though. Low-E glass works year-round to maintain your homeโ€™s consistent temperature and, by blocking UV rays, it also keeps those rays from heating your home further in the summer months.

Myth 2: Low-E Glass Darkens Your Home

Have you heard that Low-E glassโ€™s metallic coating makes it less effective at bringing beautiful natural light into your home? This is definitely a myth. As mentioned above, the Low-E coating is on a microscopic level, meaning it wouldnโ€™t impact the sunโ€™s ability to pass through and bring sunshine into your homeโ€™s interior. Itโ€™s transparent to our eyes!

Myth 3: Low-E Glass is Costly and Not Worth the Investment

While Low-E glass is a premium product, we pride ourselves on bringing quality at an affordable price point. Most importantly though, itโ€™s definitely worth the investment! With Low-E glass, you have a year-round measure that helps regulate your homeโ€™s temperature without sacrificing on natural light.

Myth 4: Low-E Glass Requires Special Maintenance

This is definitely a myth! Low-E glass, like most glass types, needs a simple scrub with your standard glass cleaning solution when you notice streaking or minor debris. Beyond that, though, it shouldnโ€™t require any additional maintenance. As with most vinyl windows, itโ€™s a low-maintenance product.

Myth 5: 3-Layer Low-E Glass is Less Effective

3-layer Low-E glass has been triple-coated with that microscopic metallic coating for more effective coverage from UV rays. Itโ€™s the gold standard package for protecting your home and providing energy efficiency.

White slider window overlooking wooded area

Ready to Transform Your Home?

At Window World of Denver, we truly believe in bringing high-quality products at good prices to our customers. Give us a call to talk over your upcoming project or simply start with a free estimate today! Weโ€™re more than happy to help make your dream home a reality.

Call Now (303) 574-9594

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

Awards & Accreditations

Digital Marketing Strategy for Home Services by TriMark Digital

*The Window World credit card is issued by Wells Fargo Bank, N.A., an Equal Housing Lender. Special terms apply to qualifying purchases charged with approved credit. The special terms APR will continue to apply until all qualifying purchases are paid in full. The monthly payment for this purchase will be the amount that will pay for the purchase in full in equal payments during the promotional (special terms) period. The APR for Purchases will apply to certain fees such as a late payment fee or if you use the card for other transactions. For new accounts, the APR for Purchases is 28.99%. If you are charged interest in any billing cycle, the minimum interest charge will be $1.00. This information is accurate as of 08/01/2025 and is subject to change. For current information, call us at 1-800-431-5921.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.