velux on condensation and skylights

     ​Condensation is usually more noticeable on skylights because warm, moist air rises to the ceiling. The cause of condensation is not typically from skylights, though. It is due to the excess moisture in the air. Using a dehumidifier and providing adequate ventilation in your home can go a long way in preventing condensation.

     ​Sometimes condensation can appear as a leak when it hasn’t been treated properly. This occurs when there is a rough opening in the unit that is not properly insulated from the outside cooler air. This allows warm, moist air to escape from the room and come into contact with the underside of the flashing and/or cladding. Having the roofer or installer add felt and insulation between the frame and rough opening should prevent this problem.

     Condensation in one spot may be a sign that your home is retaining too much moisture in another area.

​     You might be wondering what causes the excess moisture resulting in condensation. Air naturally contains water vapor and we contribute to that with basic human functions: breathing, perspiring, cooking, cleaning and showering. Condensation occurs more frequently in the winter because there is a more drastic difference in temperature from the warmth inside your home to the very cold outdoors.

     Here are a few ways to prevent excess moisture. Install double-paned insulated windows and doors with energy efficient Low-E glazings that help keep interior glass panes warmer. Or double-pane your current windows by adding exterior storm panels. Install vents below windows to help warm the interior glass. Take shorter showers to reduce the indoor moisture. Cook with lids on your pots to reduce the moisture that is put into the air. Run ceiling fans to keep warm air from rising to the ceiling to help prevent condensation on roof windows and skylights. If your basement is concrete, provide drainage where ground water could be building up. Run a dehumidifier during winter months and damp weather.

     Newer technology means that VELUX skylights are better insulated and create less condensation than older skylights. If you are noticing excess condensation on your older skylights, let us help you keep your home dry and healthy with new VELUX skylights!