Shreded / faulty Insulation Covering?

Anyone ever seen this done to insulation wrap? There was evidence of mice but why would they shred the wrapper and not touch the inulation?

[ATTACH]

[/ATTACH]

The gray flex duct was subject to recall some years ago because it deteriorates that way when exposed to light. It’s a product defect.

That is just what what I thought when I saw it…:slight_smile:

Wow . . . that answer can only come with exsperience - that’s for sharing yours!

It was hand-me-down knowledge when I learned it many years ago too. Not all of the gray stuff is suscetible to that, but when you come across some that is, you will no doubt recognize it.