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Utopia Texas · 11-29-2021, 10:45 AM

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Hold a burning match or lighter next to the glass. Reflection of one flame is single pane glass and a reflection of two flames is double pane glass.

11-29-2021, 10:45 AM	#6
Utopia Texas Senior Member Join Date: Apr 2016 Location: Brookshire & Cat Spring,Texas Posts: 222	Re: Safety or not Sponsored Links (Register now to hide all advertisements) Hold a burning match or lighter next to the glass. Reflection of one flame is single pane glass and a reflection of two flames is double pane glass.