How to Diagnose a Skylight Roof Leak

Skylight Roof Leak

Identifying a skylight roof leak immediately is essential to minimize water damage. Homeowners can hire skilled professionals to complete the repair once they’ve narrowed down the leak’s origin and diagnosed the cause.

Skylights provide 30 percent more light than regular vertical windows, making them a desirable roof addition for those who want to improve natural light, but the nature of the design puts it at a higher risk of leaks. It interrupts the normal flow of water down the roof’s slope and requires skilled flashing installation to guard against leaks. The following information can help homeowners inspect and deduce why water is leaking through their skylight.

Inspecting the Skylight

The presence of water may not always indicate a skylight leak. First, if the skylight has the ability to open, check that the window is fully closed and locked. Next, rule out condensation as the cause of the moisture. If the humidity level is high inside the home or the outside air is below freezing, condensation may pool on the window’s glass surface and drip onto the nearby drywall. If the skylight is completely closed and no condensation is present, observe the window from the outside to see if debris on top of the glass may be preventing proper precipitation flow around the skylight. When inspecting the skylight from indoors, homeowners should trace the trail of water to its highest point to find out where it originates.

What Caused the Leak?

Moisture may have penetrated the seal in the skylight. In this case, find out if the skylight is still covered under the manufacturing warranty. Some products are covered from 10 to 15 years after installation. While re-sealing the window may provide temporary relief, aged skylights will eventually require replacement, especially if the seal no longer works properly.

Another cause could be warped or inadequate metal flashing. Correct skylight installation involves placing a metal sheet around the window underneath the adjacent roof shingles. The roofing materials should cover all sections of the flashing. Breaks in coverage can give water space to enter, seeping through the roof deck to the insulation and drywall surrounding the interior skylight.

Repairing a Skylight Roof Leak

Some repairmen might utilize roofing cement as a quick-fix option. Applying roofing tar to the gaps in between the flashing and the shingles may keep water out briefly, but complete reinstallation of shingling and flashing is necessary for long-term protection.

Certified roofers will remove the shingles and flashing in the event of a skylight leak. They will install sturdy metal flashing around each edge of the window and layer new shingles on top.

To get a qualified roofer’s opinion on your home’s skylight roof leak, contact the team at Knockout Roofing today.