Quote:
Originally Posted by jimcol
There is space between the roof and the ceiling. The vent is often refereed to as a mushroom vent. The white disc you see on the roof is attached to the base plate via a threaded rod. They do tend to get loose over time so whenever on the roof hand tighten them by rotating the disc clockwise. If you don't a future visit to the roof may reveal a missing disc. That's if you’re lucky. If not lucky water spots on your ceiling will reveal the same thing.
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Any idea where I can get replacement vent covers? One is cracked