Double paned windows are great for energy efficiency and they add aesthetic appeal to a home. If you have dual pane windows because of these things and now notice condensation on the glass, then the glass is likely collapsed. Below is information about what collapsed glass is, how to tell if you have it, and how it can be repaired.
When dual pane windows are made, there are two pieces of glass that are separated by a special type of gas. You will also often hear this referred to as double gazing. Over time, the gas can dissipate which then causes the windows to lose pressure. Once pressure is lost spaces are created. Moisture can get into these spaces and when this happens condensation builds up on the inside window.
Collapsed Glass Detection
Before you do anything clean the window first. You never know if the condensation is on the outside of the window. After you do this, go outside, and stand a few feet back from your house. Look at this window and compare it to the other windows. It should be obvious which window has the collapsed glass. If your windows are very dirty, you may have to clean all of them first. You need to do this on a sunny day and ask a family member to do the same, so you know they are seeing what you are seeing.
Collapsed Glass Repair
Contact a glass company who can come out to your home and look at the glass. They will then determine the best way to repair it. If the collapse is very bad the glass company will likely suggest that you replace the entire window. While they are there they will inspect the other windows in your home to be sure the glass is sealed properly.
If the condensation is not very bad, the glass company may be able to take the window out and replace the gas that is missing. This generally works very well, and the condensation will not come back.
You also have the option to contact a company that defogs windows. They will drill a small hole on the glass and then remove the condensation. This will remove the condensation but because this does not repair the glass the problem will come back again in the future.
Talk with the glass company about this information and they can give you many more details. Visit a site like http://www.ridgeglass.com for more help.