Hey guys, I'm new to window cleaning and while scratched glass is always a concern from what I've been reading it sounds like 90% of the time it's only with temperd or safety glass ( if I'm wrong please educate me). So with that being said how do you know for sure if its temperd? I know it supposed to have a label etched on it but I would imagine that's not always the case. So how do you know for sure what type of glass your dealing with?
from Window Cleaning Resource http://ift.tt/1CbvnXG
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