Quote:
Originally Posted by wa8yxm
The clamshell ventelator, painted to match and properly caulked can seal it but in this case, even that is not important, if it leaks, the leak drips down to the ground no harm done.
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No harm, unless there is raw wood in there -- and usually there is.
Frequently there are a couple 2x4s or such, to provide a strong mounting for such things as the roof ladder (else the screws for the ladder would be merely in the fiberglass shell, not very strong).
So, seal the leak. RTV is good for this.