Dear Owners and Residents:

We have received several inquiries about condensation/ice build up on the interior window surfaces.  Condensation and frosting can happen on the most efficient windows during the winter. 

Condensation and/or frost build up on inside windows is a common problem during the winter season. 

Why do you have condensation/ice on your windows?

In the winter months, when the outside temperature drops below zero, and the windows are closed, the moisture is trapped inside your home and is drawn to the cooler window panes.   When the surface temperature outside of your window goes below the dew point, the water vapour changes from a gas form to liquid form.  As the outside temperature of the glass gets colder and is exposed to the warm moist air inside, it condenses on the window pane, freezes and forms ice crystals.

 How do I fix it? 

Reducing the humidity levels to stop window condensation/ice build up in your unit can be accomplished in the following ways:

• Adjust your humidifier based on the outside air temperature.  Natural Resources Canada has the following recommended Indoor Relative Humidity levels.  Ideal setting for temperatures between 0c to -18c is 40%-25% RH.

• Run a dehumidifier.  

• Refrain from air-drying clothes inside. 

• Run exhaust fans.

• Turn down excessive heat in unit.

• Absorb excess condensation with a rolled up towel on the window sill at night. Keep the towel away from the glass to allow for sufficient air flow.

• Avoid over-watering the planets.

• Opening windows on milder days for a brief period to ventilate the unit each day. 

To stop window condensation before it causes major problems, you will need to identify the cause of the issue.  Is the humidity too high in your unit?  Do you have lots of plants near the window?  Please be proactive, do not take chances with your health, or expect the building to fix damage caused by condensation.    

For those residents who have already reached out to the Management Office with their concerns, a window contractor will be inspecting your windows and based on our findings, the necessary corrective measures will be taken. 

Should you have any questions, please do not hesitate to contact the office.

Kaveh (Kevin) Oskoui, Condominium Property Manager

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