Alright, I am going up there tomorrow morning, how will I be able to tell if it's rotted ? Can I just pull on the vent ? Does the vent just pull right out ?
It looks like that vent is falling down, through the roof material. It may be that before you got to it with the Eternabond, the roof leaked in that area and the plywood sheathing rotted around the vent. You probably wouldn't have noticed the leak since it is above the fridge space.
My suggestion would be to pull it out of there and install a new vent on stable material.
Is this cover above your refrigerator?? If so it's the chimney for the refrigerator. If your worried about the corner area just run another piece of Eternabond over the area.
John & Carol Life members 01 31'Sea View single slide, F53 V-10 with 134,000 miles and counting. 2012 Jeep Liberty Smi brake system Security by Bentley God Bless
Looks like a refrigerator vent that has outlived it's usefulness. The plastic on those and the air conditioners get brittle from the sun. I would remove it, check for damage and go from there.
Ron & Charlotte WD8CBT since 1976 32' Gulfstream Ameri-Camp & 05 Ram QC LB
I started with nothing and I still have most of it left
I never fail, I just succeed in finding out what doesn't work