Understanding Surface Moisture on Windows & Doors: Causes and Solutions
Why Do Windows and Doors Develop Surface Moisture?
If you’ve ever noticed water droplets forming on your windows or doors, you’re not alone. Surface moisture, also known as condensation, is a common issue in many homes across Toronto, Richmond Hill, Newmarket, North York, and the GTA. While it may seem like a minor inconvenience, persistent moisture can lead to mould growth, wood damage, and even decreased energy efficiency.
What Causes Surface Moisture on Windows and Doors?
Condensation forms when warm, humid indoor air meets a cooler surface, such as a window or patio door. This process is influenced by several factors:
Indoor Humidity Levels – High humidity inside your home increases the likelihood of condensation forming on cold surfaces.
Outdoor Temperature Drops – During colder months, exterior window surfaces cool significantly, making them prone to condensation.
Poor Ventilation – Without proper airflow, moisture from cooking, showering, and even breathing gets trapped inside, increasing humidity levels.
Inefficient Windows and Doors – Older or poorly insulated windows and doors may not provide enough thermal resistance, leading to frequent condensation.
Is Surface Moisture a Problem?
While some condensation is normal, excessive moisture can indicate deeper issues with home insulation or ventilation. If left unaddressed, it can lead to:
✅ Mold and Mildew Growth – Excess moisture creates the perfect breeding ground for mould, which can impact indoor air quality.
✅ Damage to Window Frames – Wooden window and door frames can warp, rot, or deteriorate when exposed to prolonged moisture.
✅ Reduced Energy Efficiency – Foggy or wet windows may be a sign that your insulation isn’t performing as it should, causing higher energy bills.
How to Prevent Surface Moisture on Windows & Doors
Here are practical steps to manage and reduce window and door condensation:
Improve Air Circulation – Use exhaust fans in kitchens and bathrooms, open windows periodically, and consider installing a dehumidifier.
Regulate Indoor Humidity – Keep indoor humidity between 30% and 50%. Using a hygrometer can help monitor levels.
Upgrade to Energy-Efficient Windows – Window Restoration services, such as installing Low-E glass or upgrading to Warm Edge Spacers, can help reduce condensation by improving insulation.
Ensure Proper Insulation and Sealing – Consider Patio Door Restoration or upgrading to better-insulated doors to prevent cold air from creating condensation.
Use Thermal Curtains or Blinds – These can provide an additional barrier between the warm indoor air and cold glass surfaces.
When to Seek Professional Help
If condensation persists despite your efforts, it may be time to consult an expert. A professional can assess whether your windows and doors need restoration or replacement to ensure better thermal performance and longevity.
Let WRE Help You Find the Best Solution
At WRE, we understand the unique challenges homeowners in Toronto and the GTA Area face when it comes to maintaining energy-efficient, moisture-free windows and doors. Our team is here to advise you on the best solutions tailored to your home’s needs.
Get in Touch Today! – If you're experiencing persistent window or door condensation, our experts are here to help. Contact us with your questions, and we'll guide you toward the best solutions for your home.
