Fiber/powder coming out roof seams

[Kdmegali]

A weird fiber type residue coming out of roof edges and seems with rain. Any ideas what this is?

[Bill]

I'm not sure what is in the first picture. Is that a ripped bag seal? Where in the TM was this picture taken? What is the black cruddy stuff, as opposed to the white residue on the finger tip?

The second and third pics appear to be rotated 90 degrees CCW. Is the first picture also rotated? On my computer, I am seeing the white stripe in the first picture as horizontal, small end pointed left.

By any chance did you pressure-wash the TM?

Bill

[Shane826]

Bill- I think the white line on the first pic is Eternabond tape over the center seam on one roof and the other two white lines are the original center seam trim on the other roof?

Kdmegali- I have no idea what that stuff might be.