Condensation and frost on windows and doors, even on those of the highest quality, are common in most Albertan homes when the weather cools. Your windows and doors are not the problem but are clear indicators of a different issue: humidity. If there is enough moisture in your home’s air and your window glass is cool enough, that moisture will deposit onto the glass. Proper humidity levels in your home can prevent condensation and frost from occurring. It can also prevent other issues such as peeling paint and mildew.

Ideal humidity levels will depend on the exterior air temperature. The Government of Alberta recommends an indoor relative humidity of between 20% to 60%, depending on the time of year, and an average temperature of approximately 22°C. Health Canada recommends you keep your home’s indoor relative humidity levels between 30 and 55%.

In winter months, aim for humidity levels of 20-35%. Window glass manufacturers tell us to aim around 20%. However, it is recommended to have your home’s humidity between 25-35% for your health as well as preserving items such as furniture and flooring. Each home is different, so you will need to adjust accordingly. If you are still finding condensation on your windows, lower your humidity more. Be aware, however, that when humidity levels are too low, viruses and other toxins can thrive in your home. Ultimately, you will need to choose which solutions are most practical for you. We have included the following chart for reference:

Will frost or condensation on windows hurt your home? Yes and no. This is a complex question as it depends on how your home was built and what products were used. For example, if your windows are vinyl interiors, the frost and condensation won’t hurt them; however, if those same windows have MDF casings around the interior, you may see swelling.

Make sure your home has proper air movement, especially in areas that you find condensation. Open window coverings during the day to allow for proper airflow and use fans when bathing, cooking, and cleaning to circulate air and remove excess humidity. Having your furnace fan running continuously allows for air movement and lowers the likelihood of frost building up. Ensure your heat registers are open and unobstructed. If you have a humidifier, now is a great time to clean out any deposits or debris.

Vleeming homes are comfortable. Constant interior air temperature no matter the season, reduced outside noise seeping in, the use of natural lighting to animate individual areas… everything is intentionally designed to increase the comfort factor. You’ll feel the difference of a Vleeming Custom Home the first time you walk through the door.

Published November 30, 2022