Double-pane windows are designed with a sealed airspace between two glass panels, providing insulation and preventing the transfer of heat and moisture. Over time, however, the seals that maintain this airtight space can weaken, allowing moisture to enter between the panes. This results in condensation or fogging, which is a common issue with older or defective windows.
Does Window Film Cause Seal Failure?
This is one of the most frequently asked questions we receive from homeowners and business owners. Everyone wants the best products and protection, but no one wants to jeopardize their windows. We completely understand this concern and are here to clarify it for you.
While window film itself does not cause seal failure, it can sometimes accelerate the appearance of condensation in windows that already have weak or defective seals. This is because the added layer of window film can slightly alter the pressure dynamics within the window, making any existing weaknesses more noticeable.
What are window seals?
Window seals serve as a protective barrier on double- or triple-pane windows. These windows usually have gas, such as argon, trapped between the panes. The seal locks in the gas, creating an insulating barrier that helps minimize the effects of outside temperatures. This is one of the main reasons people invest in double-pane windows—they keep your home cooler in the summer and warmer in the winter.
Why do window seals fail?
Unfortunately, all double-pane windows will eventually experience seal failure. Over time, the seal between the panes breaks down, allowing moisture to enter. This leads to fogging between the panes. The timing of seal failure depends on several factors, including sun exposure, weather conditions, bird strikes, and more. However, the good news is that most window manufacturers offer warranties for seal failures.
Does window film cause seal failure?
As mentioned earlier, window film does not cause seal failure. In fact, if your double-pane windows show no signs of seal failure and you have window film professionally installed by an authorized 3M window film dealer, you will automatically receive a 3-year (36-month) seal failure warranty. 3M and other reputable manufacturers offer even more extensive warranties—such as a lifetime warranty through Milgard—matching that warranty word for word for a small additional fee. Talk about peace of mind!
How to Prevent Fogging or Condensation:
- Choose High-Quality Films
Always opt for reputable, high-quality window films that are specifically designed for use on windows. Cheaper, low-quality films may not offer the same level of protection and could void your window seal warranty. - Professional Installation
For optimal results, have your window film professionally installed by experienced technicians who understand the unique needs of double-pane windows. Proper installation ensures the film is applied correctly without damaging the seals or the glass. - Interior vs. Exterior Film
Consider using exterior window films, which are applied to the outer surface of the glass. These films are typically more efficient at reducing heat and glare and are less likely to affect the seals between the glass panes. - Consult with Experts
Work with professionals who specialize in window film installation and have experience with double-pane windows. They can help you select the best type of film and installation method tailored to your windows’ needs.
Final Thoughts:
When installed correctly with high-quality materials, window film can enhance the performance of your double-pane windows, providing additional insulation, UV protection, and glare reduction.
Suppose you’re concerned about the possibility of fogging or condensation. In that case, it’s always a good idea to consult with experts like Window Shield to ensure the best installation and optimal results. Rest assured that high-quality window film, installed by professionals, will not cause seal failure but can provide years of protection and comfort for your home or office.