We all can all do much more than clean windows. We can Inspect and Protect. As an example. When cleaning windows who of us can ignore negative deflection? It is SO obvious when using a six inch razor and even a squeegee. But the building/home owner will never know they have it. Unless we bring it to their attention. Look at this simple test for negative deflection.
The blog and email listed at the end of this video do not exist anymore. Rather use
Most windows do not have this problem right out of the window factory. It can develop over 20 years. And results when the vapor inside escapes with nothing to replace it. But it can be a problem from the factory. If it is discovered within the first year after the window has been purchased then the owner has the right to have it replaced free of charge. At least the replacement window should not cost anything.
Why should a window with negative deflection be replaced? Why is it defective. Simply because it could implode. The opposite of explode. But the result is the same. When the deflection becomes great enough and the atmospheric pressure is just right, you might clean the window and hear a bang minutes after. This happened to a good friend. The homeowner blamed him. But when he did the research he was able to explain to the customer exactly what really happened.
All scratches start with what is called a Point Indent Fracture or a PIF. We all have seen small indent fractures that look like bug poop. If you do NEVER try to rub it off with the end of your applicator using pressure. It might grow a crack leg and spread out in a microsecond. This happened to me. My "point" is that PIFs on a negatively deflected surface are especially dangerous!
All of this information pertains to the physical integrity of the window. Which is information that can be brought to the owners attention should it be discovered. Because something can be done about it most times. Hence the expression Inspect and Protect. You get the point. We are more than window "cleaners". We are Total Glass Care Technicians. TGCTs. Or Glass Smart. S.urface M.aintenance A.nd R.estoration T.echnicians
Henry Grover Jr.
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