FDA registered. Hydromer is ISO 9001:2015 certified with TUV Rheinland of North America. ISO 13485:2016 is certified with BSI.

FDA registered. Hydromer is ISO 9001:2015 certified with TUV Rheinland of North America. ISO 13485:2016 is certified with BSI.

External Condensation on Windows

Table of Contents

Waking up to a blanket of water droplets covering the outside of your windows can be both puzzling and frustrating. This phenomenon, known as external condensation, obstructs our views and leaves many homeowners scratching their heads. In this detailed exploration, we will demystify external condensation, delve into its causes, and offer many practical solutions to ensure your windows stay clear, enhancing your home’s aesthetic and comfort.

Decoding External Condensation

External condensation is a natural occurrence, especially in spring and fall transitional seasons. This happens when the exterior glass surface’s temperature falls below the dew point of the air outside, turning air moisture into water droplets on your windows. While it might block your morning view, it’s also a testament to your windows’ efficiency in insulating your home, keeping the warmth inside where it belongs.

High-Performance Windows: A Double-Edged Sword?

Today’s windows are engineered for superior energy efficiency, keeping your home cozy without overworking your heating system. However, this innovation has a side effect: it contributes to external condensation. The better your windows are at insulating, the cooler the exterior glass surface will be, making condensation more likely. It’s a small price for energy efficiency, but fortunately, it’s manageable.

Strategies to Keep Your Windows Clear

  1. Boost Outdoor Air Circulation
    • Simple landscaping adjustments can make a significant difference. Trim any plants close to your windows to enhance airflow, reducing moisture buildup. This tackles condensation and brightens your home with more natural light.
  2. Harness the Power of Anti-Condensation Window Spray
    • Incorporating an anti-condensation window spray into your window care routine is a game-changer. This spray forms a protective layer on the glass, repelling water and preventing condensation. It’s an easy and effective solution for maintaining clear windows.
  3. Optimize Your Sprinkler Setup
    • Water from sprinklers can exacerbate external condensation. You can minimize this effect by redirecting sprinklers away from your windows, ensuring that added moisture doesn’t contribute to the problem.
  4. Introduce Window Ventilation
    • Ventilating around your windows can seem counterintuitive, especially during cooler months. However, allowing a slight breeze to circulate can help equalize temperatures and reduce condensation without compromising your home’s warmth.

Enlisting Professional Insight

Persistent condensation, especially if it’s causing water to leak into the window frame, could indicate a deeper issue. In such cases, consulting with a window professional can provide insights into whether your window seals are compromised or if other solutions are necessary.

Long-Term Considerations

Investing in windows designed to combat condensation might be worth considering for those planning future home improvements. These windows come equipped with features specifically aimed at reducing condensation, offering a more permanent solution to this seasonal annoyance.

Additional Tips for a Condensation-Free View

  • Install External Window Insulation: External window insulation kits can further reduce the temperature differential between the inside and outside glass surfaces, lowering the chances of condensation formation.
  • Utilize Dehumidifiers: In areas with high outdoor humidity, using a dehumidifier inside can help by reducing the overall moisture level in the air, which can positively affect external condensation levels.
  • Regular Window Cleaning: Keeping your windows clean enhances the effectiveness of anti-condensation sprays and improves visibility, making any condensation that forms less noticeable.
  • Educate Yourself on Window Materials: Some materials, such as certain metals, can increase the likelihood of condensation due to their thermal conductivity. Researching and choosing materials with better insulation properties can make a big difference.


External condensation on windows is more than just a visual nuisance; it’s a sign of changing seasons and a testament to the efficiency of modern windows. By understanding the phenomenon and implementing a combination of simple fixes, strategic product use, and possibly professional advice, you can enjoy clear windows year-round. These measures not only enhance your view but also contribute to the longevity and performance of your windows. Remember, the goal is not just to fight condensation but to manage it to maintain your home’s comfort and energy efficiency. Clear views ahead!

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Anti-Condensation Spray

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