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If I recall correctly, fiberglass is a pretty decent heat insulator. Wouldn't be possible to cut those blades into tiles

The physics of insulators, like fiberglass batting. Basically, it works the same way as down feathers or fur. The material traps air into many, many somewhat separate pockets. This interrupts convective flows, which drastically slows down the rate at which heat can move through air. Since air is the opposite of dense, not much heat can be transmitted through air which does not move.

Fiberglass tiles aren't going to have the same insulating property, just because they're also fiberglass.



What about crushing them and then kind of shredding it into a mulch to create the pockets?




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