Wanting to know how to tell the types of glass

I am unsure what types of glass I will be cleaning and want to know how to tell the difference before I clean them.

I see windows that look tinted and there is a lot of crap I need to scrape off. Then find out later that it's either made in the window or not tinted at all. Also other glass like low e glass and others that I need to know before cleaning. It's one of my troubled spots I need to be on top of.

Thanks





Hollywood

from Window Cleaning Resource http://windowcleaningresource.com/vBulletin/residential-window-cleaning/39268-wanting-know-how-tell-types-glass.html

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