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Can anyone shed any light on this subject? I have several cases where the inside pane has cracked months after installation. I'm told this is due to thermal stresses and the only way to prevent this occuring is to use toughened glass. If anyone knows alot about this subject I would be interested to find out more.
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It doesn't sound like thermal breakage to me. Unless the origin of the break is at right angles to both the cut edge of the glass and to the principle glass surfaces it isn't thermal. So what do the origins of the cracks look like? Also, where, along the edges of the units are they occurring?
George.