Category : Glass by Glassma
Date : 4 Jan, 2024

Double pane windows, also known as insulated glass units (IGUs), have gained popularity in recent years for their energy efficiency and ability to enhance indoor comfort. However, with their increasing prevalence, numerous myths and misconceptions have surfaced. In this blog, we aim to dispel these myths and shed light on the true benefits of double pane windows.

Myth 1: Double Pane Windows are Only for Cold Climates

Fact: While it’s true that double pane windows are excellent at retaining heat, they are equally beneficial in warmer climates. Double pane windows with low-emissivity (low-E) coatings can help block infrared rays, preventing excessive heat gain and reducing the load on air conditioning systems. They are effective year-round, providing comfort regardless of the climate.

Myth 2: Double Pane Windows Never Need Replacement

Fact: While double pane windows are designed to be durable and long-lasting, they are not immune to damage or wear over time. Issues like seal failure, condensation between the panes, or cracked glass can occur, necessitating replacement. Regular maintenance and timely repairs can extend their lifespan, but eventual replacement may still be required.

Myth 3: Condensation Means Double Pane Windows are Defective

Fact: Some condensation on the exterior or interior of double pane windows can be normal, especially during extreme weather conditions. However, condensation between the panes indicates a broken seal, resulting in reduced energy efficiency. It’s essential to address this issue promptly by seeking professional glass repair services.

Myth 4: Double Pane Windows Eliminate Noise

Fact: Double pane windows can provide better sound insulation compared to single pane windows, but they do not completely eliminate outside noise. The level of noise reduction depends on the window’s construction and the thickness of the glass. For significant noise reduction, consider opting for triple pane windows or specialty acoustic glass.

Myth 5: Double Pane Windows Do Not Improve Energy Efficiency

Fact: Double pane windows are designed to significantly improve energy efficiency compared to single pane windows. The space between the two panes acts as insulation, reducing heat transfer between the interior and exterior of a building. When combined with low-E coatings and gas fills (e.g., argon or krypton), they can offer even greater thermal performance.

Myth 6: Double Pane Windows Are Expensive and Not Worth the Investment

Fact: While double pane windows may have a higher upfront cost compared to single pane windows, they offer substantial long-term savings. The energy savings from reduced heating and cooling costs can offset the initial investment over time. Additionally, they can increase the property’s resale value and improve indoor comfort.

Myth 7: Double Pane Windows Are Prone to Mold Growth

Fact: Properly installed and maintained double pane windows should not promote mold growth. Condensation between the panes is a sign of seal failure, but it does not necessarily lead to mold issues inside the window unit. Regular cleaning and adequate ventilation help prevent mold growth in any type of window.


Double pane windows are an excellent investment for any climate, providing enhanced energy efficiency, improved comfort, and reduced utility bills. By debunking these myths, we hope to emphasize the value of double pane windows and their role in creating a more sustainable and comfortable living environment. If you have double pane windows in need of inspection, maintenance, or repair, consult with professional glass experts to ensure they continue to serve you efficiently for years to come.