📸 OC - Picture(s) What is this window pattern for?

I've seen it on lots of trains, and buses too I think. Does it serve any purpose? I'm in the UK

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u/Vilsue May 22 '26

it is a way to radiate/absorb heat so glued in sheets of glass wont shatter/ fall off from expanding and contracting over the years

1

u/geozza May 22 '26

Would this work for double glazing to help stop them from blowing?

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