How to Prevent Condensation on Windows

Water condenses on the surface if it is cold enough and there is enough amount of water vapor in the atmosphere. In winters there is lots of vapor in the atmosphere and as the surface of glass cools easily as compared to other surfaces, water gets easily condensed on the surface. As winters approach, every one of us might be looking for how to prevent condensation on windows.

Condensation in winters can be problematic as it can cause decay and molds on the surfaces of the walls of the windows, if they persist for a longer time on the glass. Water also gets condensed on the surface of the walls and glass in summers, but the problem is not so serious in this season. Preventing it is very easy using the simple tips given below.

Tips to prevent condensation on windows in winters:

Warm the surface of the window:

  • There are many options that will help you warm the surface of the window.
  • Condensation on the windows actually occurs due to decrease in temperature of the glass surface, so making it warm would be a better way to prevent it. This is the easiest methods of preventing condensation.
  • You can make the window surface warm by opening the drapes of the windows.
  • Raising the temperature within the room will also be helpful.
  • You will also get glasses that do not become cold easily, replace your windows with such efficient ones.

Decrease the humidity within the room:

  • You can decrease the humidity within the room by eliminating all the sources that make the internal air humid.
  • If necessary use dehumidifiers in your rooms. They will also help you in preventing humidity.
  • Dehumidifiers are necessary, especially in newly constructed houses, because in such house during the construction process the air flow in the internals of your house is altered to a great extent.

Maintenance of windows:

  • Follow proper maintenance for the windows in your house. Make sure that there are no cracks and breaks in the glasses.
  • Also make sure that the sealing wax is adhered to the windows properly and there are no gaps left in between.
  • Caulk the windows properly if there are any gaps in the seal and replace the cracked glasses. Such glasses can cause condensation even within the inside of the glass.

Allow the air to circulate freely:

  • Provide proper ventilation inside your house such that the air is circulating properly inside the house. Install exhaust fans and vents in your house.
  • Keep the exhaust fans on for longer periods in winters than you normally do. This will make the air inside the house dry and prevent condensation on the windows.
  • Air cools easily when it is not circulating properly inside the house. Therefore keep the windows open and switch on the ceiling fans. This will keep the air in continuous motion.
  • Condensation builds up on the internals of the windows if the air is blocked and unable to reach inside of the house, so do not close the windows during day and keep the curtains raised in winters throughout the day.
  • Fix wire gauges or mesh to the windows, so that you can keep the windows open during the night as well.
  • Many people keep the windows closed to prevent the loss of heat from the house, but this will increase condensation problems.
  • Provide proper ventilation in the crawl space or the basement area such air is properly circulated there. If your basement is not ventilated then get it done just before the winters arrive.

Preventing condensation on windows in summer:

However, this is not as common as the winter condensation problem. You can prevent it following few suggestions given here.

  • If the temperature inside your house is less than the temperature outside, then you can increase the temperature inside your house as you have no control over the outside temperatures.
  • Applying a coat of low E-coatings will also help in preventing the condensation by dropping the outside temperature of the glass.

Try the tips that are given above. They will surely be very helpful for you in condensation prevention.


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