Planitherm Glass Problems

When it comes to selecting the right type of glass for windows, the choice can sometimes be daunting due to the plethora of options available. One such option that has been in discussions recently is the Planitherm glass. But just like any other product, Planitherm too has its strengths and potential concerns.

Understanding the Blue Tint Issue
One of the significant concerns raised about certain types of sealed unit windows is the blue tint effect that can be observed when sunlight strikes the glass at a particular angle. This effect primarily stems from ‘hard coat’ glasses, such as the Pilkington K and its Saint Gobain counterpart called ‘ecologic’. Both of these are based on older technology and are notorious for exhibiting the blue haze effect.

However, both these companies have transitioned to offering ‘soft coat’ glass options: Pilkington KS and Saint Gobain Planitherm. The soft coat versions incorporate a metal coating, which remains invisible, hence no blue tint. Among them, Planitherm, especially Planitherm total+, has been recommended for its lack of the blue haze and its quality.

Pilkington Soft Coat vs. Hard Coat
There seems to be a bit of confusion among consumers regarding the differences between Pilkington’s soft coat and hard coat. While Pilkington’s hard coat, known as Pilkington K, was popular at one point, the newer soft coat has taken precedence. However, it is essential to differentiate between the two and choose based on current technology and needs.

Performance and Durability
Soft coat glasses like Planitherm total have become more standardized in recent times. One critical factor to remember is that soft coat glass, in its single sheet form, has a limited lifespan and is susceptible to damage. However, when enclosed within a sealed unit, these concerns are negated, and the glass functions optimally.

Other Factors to Consider
Beyond the type of glass, there are other considerations. For instance, whether or not to opt for Argon gas filling in the sealed units. While some believe that Argon doesn’t significantly alter the U-value (a measure of thermal efficiency), it doesn’t add much to the cost either, making it an option worth considering. Another aspect to think about is the spacer. Opting for warm edge spacers, such as the Swiss spacers, can add value in terms of insulation and thermal performance.

In Conclusion
When choosing between different glass types for window installations, it’s crucial to be informed about the pros and cons of each option. While both Pilkington soft coat and Planitherm are considered of similar quality and specs, consumers should weigh their options and potentially seek expert advice to ensure they’re making the best choice for their needs. With the right decisions, homeowners can ensure optimal thermal efficiency, aesthetic appeal, and longevity from their windows.