Is Exterior Window Film Waterproof?

Exterior Window Films are constructed in a special way to withstand all different types of weather conditions and weather extremes. Still, homeowners and property managers are concerned if their exterior window film is waterproof. Well, the answer to their questions is not a straight yes or no. While most outdoor window films feature strong water resistance some of them are not fully waterproof. This is because proper installation and edge sealing are necessary to prevent water ingress and ensure the long-term durability of your exterior window film.

How Exterior Window Films Handle Rain, Humidity, and Washdowns

Several features make exterior window film an effective control made to withstand the elements for many years. These components make it ideal for difficult-to-access spandrel and interior glass including atriums, skylights, and conservatory roofs.

Strong Hydrophobic Coating

One of the major differences between exterior window films like the Exterior Neutral and interior window films is its exposed surface application. As such, most exterior window films are engineered with waterproof window coating. This coating is in place to repel moisture, while being scratch-resistant to stand tough through outdoor weather. They are also designed to be highly UV resistant to help keep interiors from fading.

Waterproof Adhesive Properties

Most outdoor window films have strong adhesive properties to prevent them from falling off easily. This makes exterior window films the preferred option when it comes to durability and resistance to moisture. While exterior window films may require more effort to install compared to interior films, they offer a more permanent solution for those seeking lasting benefits in their homes.

Differences Between Water-resistant and Waterproof Ratings

As with all things, there are some disclaimers that installers should be aware of. One such vital sailing point is the difference between water-resistant and waterproof ratings. Basically, a water resistance window film provides protection against moisture, but may not stand the prolonged exposure to water elements.
Waterproof window films, on the other hand, are engineered to be impervious, which means they overcome harsh water elements. Features to look out for when choosing between these types of films include;

Level of Protection

Water-resistant window films have less ingress protection (or lower IP ratings) than their waterproof counterparts meaning that it’s easier for liquids or solid particles to permeate them. Most manufacturers test a window film's waterproof capabilities by finding its hydrostatic head. The metric measures how resistant a material is to a vertical column of water—in other words, the maximum height the water column can reach before the liquid begins to flow through the window film. Waterproof window films will generally have a higher hydrostatic head than their water-resistant neighbours.

Durability and Testing

When selecting exterior window films, it is necessary to check the durability of the window films. Most waterproof window films are made of materials that can withstand the test of time while being impervious to moisture.

Sealing

This feature is another vital component for ensuring the imperviousity of a window film. Proper window film edge seal will prevent water intrusion and potential damage to the window films even in harsh weather conditions. To ensure you get the best window film edge seal, it is always better to use top window film installation services.

Best Practices for Installation, Edge Sealing, and Maintenance

Exterior window films can be engineered to be fully waterproof. However, homeowners must consider some film installation tips to preserve the durability of their windows’ films.

Install Quality Exterior Window Films

Different brands of window films are designed differently. For instance, some films are created to meet a certain price-point and skimp on quality, leading to sub-par waterproof ability. Here, you may need to consult with a commercial window film company like Solar Screen to see what type of brands they carry.

Use Proper Cleaning Techniques

Window films have procedures on how to properly clean them after they are installed. For example: It’s important the films aren’t cleaned with any harsh chemicals or power washers as this can affect their adhesiveness and ultimately waterproofing.

Monitor the Lifespan of Your Window Films

Window films aren’t built to last forever, but that’s not to say they won’t easily survive past 10 or 20 years. Regardless, as time passes, your exterior window film may lose some of its waterproof properties.

When to Choose Specialized Waterproof Membranes Instead

To ensure the longevity of your exterior window films, using a waterproof membrane, especially in water logged areas may be the best course of action. But, this adaptation is only necessary where there is bulk water filtration.

Conclusion

A lot of these questions like whether an exterior window is waterproof are best answered by a certified company like [Solar Screen] (https://solarscreen.eu/nl/). That’s because they can pinpoint the best types of films for your commercial projects and help you determine optimum solutions.