If you are putting in a new roof on top of an old roof, and you also want to put in a skylight, does the flashing of the skylight just rest on the old roof, then put the new roof on top of the flashing, or should the entire flashing go under the old roof/paper and all? The reason why I ask is I have been trying to troubleshoot a chronic leak in in one of my skylights. And today I removed part of the sheetrock on the side and discovered that whoever did this job some years ago just rested the skylight on the old roof, then installed the new roof on top of the flashing. Something tells me this is not right and the water is finding its way through the old roof from another penetration up higher and working its way down to the skylight. The actual flashing when viewed from the top looks fine. I can't find any thing that jumps out at me that indicates a problem.
- posted
15 years ago