Skylight leaks are a common problem. Unfortunately, many skylight leaks are caused by roofing contractors who were not properly trained in or knowledgeable about installing flashing around skylights.
How Do You Know if Skylight Flashing has been Properly Installed?
If you want to ensure your roofing contractor has done a good enough job to prevent skylight leaks from occurring, look for the following:
- All pieces of flashing extend 4 inches from the skylight onto the roof deck.
- There is a back pan exit that prevents water and snow from accumulating in the back pan.
Should You Re-flash to Prevent a Leaking Skylight When You Re-roof?
Re-flashing skylights is an added expense when you have a new roof put on, but it is well worth the money. Here’s why:
- The old flashing may be rusted.
- The old flashing may be crumpled in the roof removal process.
- The old flashing will have nail holes from the previous installation.
- Water can enter through these holes.
- The old flashing may have been incorrectly installed in the first place.
- There is no way the old flashing will have the same life expectancy as the new roofing material. To prevent skylight leaks, it will have to be replaced before your new roof will have to be replaced.