Double-pane windows deliver better thermal (and acoustic) insulation than single-pane ones, but they’re bound to underperform over time. Gas leakage due to seal failure happens due to several reasons: window quality, installation workmanship, sun exposure and altitude among others.
Some estimates show that gas-filled, double-pane windows can leak as much as 1% per year. The National Glass Association, though, say that units can still insulate well even when only 80% of their gas remains. However, it’s imperative to keep your eyes open to immediately spot red flags and replace faulty units that no longer serve as effective heat barriers.
When your rooms unnaturally become too cold or hot, the following can point to seal failure and compel you to get better windows:
You See Inside Pane Sweat
The most telling sign of window seal failure is the presence of water droplets inside the glass. As the gas escapes, moisture-laden air takes its place. And because the glass surface is usually colder than the moist air, the panes would fog up. The more sweating happens, the more insulating gas is lost.
You Notice the Glass Bowing Inward
Any experienced replacement windows contractor would attest that glass distortion is a classic indication of seal failure. As the remaining gas settles at the bottom, the panes would begin to collapse into the center of the window. In some cases, the glass sheets bow inward so much they actually touch.
You See White Film in Between the Panes
You don’t necessarily need to see condensation forming to determine that it’s occurrence. It would leave calcium deposits on the glass, staining the interior side with white films. Without visible evidence of moisture, traces of calcium deposits would suffice to diagnose gas leakage.
As the region’s trusted replacement windows company, Renewal by Andersen® of Quad Cities offers a long-term solution to improve energy efficiency. We use two specialized sealants to secure the twin panes of our units and provide them a clean surface to adhere to. As a result, our double-pane windows are more resistant to seal failure and, therefore, gas leakage.
To learn more about the anatomy of Renewal by Andersen windows, call us at (844) 366-7784 now to schedule your free, in-home consultation. We serve Davenport, IA, and the nearby communities.