I’m building a large addition onto a custom home, and before removing the existing windows we poured the new concrete slab. Even though we protected the windows which were to be installed into the new addition, some concrete splattered onto them. Now the owner is saying we pitted the windows with the splattered concrete. ( Can concrete pit glass ) these windows are about 2 years old.
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Replies
I've never seen concrete pit the glass, but it can stick so hard as to be almost impossible to remove. Maybe it pitted from the scraping action used to clean it? I had a truck whose rear window had some stucco splatter on it for years. I sold it with the splatter still there. Not worth buying new glass for.
Bill
Impact of the aggregate can put small chips in a glass surface, and given enough time the alkali can cause some fine etching.
I wear a pair of OLD already scratched/chipped eyeglasses when doing concrete (or welding, or grinding, or sandblasting, or etc.) for just that reason.
junkhound is very right. easy to pit glass with rete.
What I don't understand is how it could have gotten splashed if you protected it from getting splashed. Learn for the next time and this time make the owner happy by doing the right thing
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