When you have your windows cleaned they literally look like there is nothing there. You see no spots, no streaks, and no dirt. The glass is invisible. That is the way I like to see it, so to speak at Mr. Glass Window & Carpet Cleaning. After a good cleaning and the sparkle is back in the glass you can sit back and enjoy.
Every once in a while though you might look close and notice there are streaks or spots on the glass or I should say between the glass. When you look really close you will notice you can’t wipe the spot off. You can’t get the spot off indoors or out. What is it? Look again, I mean get right up on it. Put your nose to the glass. Do you see it? Yes, it’s between the glass. How can that be?
As you can tell the window is made of two pieces of glass sandwiched together and it is between these two on the surface of one where you might see a spot, a drip, or what appears like where a wet towel was run accross the surface and dryed. The window has failed. It has been compromised. The seal is bad. The seal has leaked.
All of the above.
Somehow the adhesive that is used to hermetacally seal the glass creating a small air gap has allowed air to infiltrate this space. How? I’ll get to that in just a bit. Just know that there is air getting in between the windows two panes of glass. This is not good. The windows are evacuated of air at the factory and sometimes even filled with an inert gas to to act as resistance to heat transfer. The problem is that the air carries moisture and now you are getting moisture between the panes of glass. This is contrary to the way the windows are engineered. One of the things a window is supposed to do is keep condensation off the glass inside your house. The two panes of glass add a sufficient amount of insulation most of the time to keep warm moist air inside the house from condensing on the cold glass. Think of your glass of ice tea on a hot summer day. The moisture in the air condenses on the cold glass. So goes it with the warm inside air against the cold glass. By adding that extra pane of glass, like a double walled insulated cup you can prevent the condensation from forming .
This usually works quite well but sometimes air laden with moisture will enter the air gap and you will get a bad window. You can do one of three things; replace it, live with it, or live with it as long as you can stand it then replace it. Yes, I am sorry to say it will need to be replaced… period. Some folks say they can repair a window. But really are they going to take it apart, clean it, evacuate it, and seal it? I don’t think so. Keep in mind replacing a window doesn’t generally mean cutting a window out just replacing the bad glass. A pretty easy fix for someone who knows what they are doing.
How does a window become compromised? It can be bad from the factory. It can happen during construction. It can happen because you applied an interior filmed tint. It can be weather related most specifically direct east or west sun. How ever it happens the one common thread is that the seal some how gets moved, tweaked, twisted or distorted.
The constant strains of heating and cooling caused from the exposure to direct sun will make a seal fail. During constrction, if a window is forced to fit into an opening it will fail. Think of a wood frame stucture-your house absorbing and releasing moisture all year round-expanding and shrinking this will make a seal fail.
I’ve seen fingerprints, dust, bugs you name it on the inside of glass. All of this stuff sealed into the panes at the factory and delivered to your builer. A lot can go wrong with windows and most of what does happenes very early in its life. While we are cleaning windows we often find problem glass and will report it to the owners, that’s our job that’s what we do that’s what we get paid for. So enjoy your clean windows and feel free to point out any suspect spots with our professional staff. Window cleaners can do more than put the shine back in your glass they can also shed some new light on your windows. Dirty windows or just bad glass? Now you know.
Dennis Chisholm
Mr. Glass Window & Carpet Cleaning
360 834 4948