These are the little holes in the fiberglass. If you enlarge the pictures by clicking on them, you will see that there is a lot of damage and they are already starting to delaminate.
It looks as if there were small bubbles or holes in the Filon coating and with the thawing and freezing we have in the winter, coupled with moisture, the holes have become larger. The same thing happens to our roads up here in the Great White North!!
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