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I have never heard of fiberglass shattering... seems if it didnt handle cold well they wouldnt make snowmobile hoods out of it.
SWEEEEEEEEEEEEEEEEEEEET!!! That is why this forum rocks! I had looked online at fiberglass siding and found that the stuff for like campers was 80-90 a sheet for 4X8. This is way more economical than that. do you know what the panels you got weighed?
That fiberglass stuff shatters like glass when cold.