First make sure there is weather stripping between the skylight frame and the curb, assuming this is a curb mount. sometimes there is not a seal inserted at that joint. If that is not an issue, then y ... read more
I would recommend a licenced mason Please don't have a handyperson do it. It will look terrible and may not withstand an siemic even properly.
i would call some of the licenced home builder in you ... read more