Knowledge base

Learn about window condensation

Condensation on your windows during winter?

Today’s homes are insulated and sealed at a very high level to make them “air tight” and energy efficient. Older homes have many ways for the for the moisture to escape and therefore fewer problems with moisture in the house. Today’s homes are often smaller than previously, yet activities like showers, dishwashers, washing machines, gas furnaces and humidifiers all pour more water vapor into homes than in past years. All of this moisture must eventually escape from your home. check out our bay windows

A family of four can release more than 18 gallons of water per week into the air of your home. Understanding Condensation. Condensation occurs on inside window surface whenever surface temperature falls below the dew- point temperature of the room. In a thermal sense the windowrepresents the threshold for humidity to form because it is the coldest surface in the room. As a rule, the colder it is outside, the greater the likelihood of water vapor forming on inside surfaces, even at reduced humidity level in the home. For example: at -40°C condensation will form at only 25% humidity in the room. At – 1°C the inside humidity level must rise to 63% before condensation will form Actions to reduce condensation.


  • Ensure the humidifier is properly functioning and adjusted to suit the outside air temperature.
  • Open windows and doors whenever practical or possible to allow interior moisture to escape.
  • Open blinds or curtains to facilitate air movement.
  • Use the ventilators when showering.
  • Use ceiling fans to circulate air.
  • Turn furnace fan on a continuous operation

Outdoor Temperature Relative Indoor Humidity

  •  – 7°C 35%
  • – 12°C 30%
  • – 18°C 25%
  • – 23°C 20%
  • – 29°C 15%


WHY CONDENSATE APPEARS ON THE WINDOWSwhy condensation appearsWhat is condensate?What are the main causes of condensation?Sources of moisture emission in a residential areaCONDENSATE CONTROL METHODSCONDENSATE PREVENTION METHODSHOW TO FIND OUT THE INDOOR MICROCLIMATEFOLLOW THE MICROCLIMATE IN YOUR HOUSE
We guarantee the provision of products of the highest quality. Send us your messages, ask questions, our specialists will immediately contact you to clarify the details of your requirements.


2 thoughts on “Learn about window condensation”

  1. Hі there I am so glad I found your blog page, I really found
    yοu by error, while I was browsing on Digg for something else, Anyhow I am here now and wouⅼd just like to
    say thankѕ a lot for a incrediЬle post and a alⅼ
    гound interesting blog (I also ⅼove tһe
    theme/deѕign), I don’t have time to reaԁ througһ it all at the moment but I have book-marked it and also added your RSS feeds, so when I have
    time I will bе back to read much more, Please do
    keep up the awesome jo.
    1. Thanks for your incredible comment. We are glad that you liked our article and found it useful. Take a look at our site and look for more useful information!

      Kind regards,
      Team Folk Windows Limited

      folk windows

Leave a Reply

Your email address will not be published. Required fields are marked *