Flashing and chimney leak repair, sealed for good.
Most roof leaks start at a flashing detail, not in the middle of a shingle field. Signature Roofing repairs flashing at chimneys, skylights, walls, and vents for homes across the Kansas City metro.
Chimneys, skylights, vents, and any spot where a roof meets a wall are the places most roofs actually fail, because the flashing that seals those joints works loose long before the shingles wear out. Signature Roofing repairs flashing details for homeowners throughout the Kansas City metro, whether it's a chimney, a skylight curb, a pipe boot, or a wall transition. Getting these repairs right usually means going back to metal flashing set correctly, not just a bead of caulk.
Is a flashing failure behind your roof leak?
If the leak is near a chimney, skylight, vent pipe, or anywhere a roof section runs into a wall, flashing is the most likely cause. Chimneys move separately from the roof structure, so the seal at that joint loosens gradually over time, and caulk-only fixes only hold for a season or two. Skylights often leak at the flashing kit around the curb or at the glazing seal itself, sometimes both on an older unit. Pipe boots dry out and crack years before the surrounding shingles need attention. In each case, the lasting fix is proper metal flashing, not another layer of sealant.
Warning signs to watch for
Staining around the chimney chase in the attic
A stain that follows the shape of the chimney base usually means the flashing or counter-flashing has pulled away from the joint. Caulk repairs on this joint tend to be temporary at best.
Water tracking below a skylight
Drywall staining under a skylight often means the flashing kit or the seal between the glass and frame has failed. On older skylights it's frequently both at once.
Cracked or brittle pipe boots
The rubber collar around a plumbing vent dries out and splits well before the rest of the roof ages out. It's one of the most common leak points on any roof.
Staining along a wall where the roof meets it
This points to step flashing that wasn't woven correctly or a missing kickout flashing at the bottom of the run, which sends water behind the siding instead of into the gutter.
What is causing the problem
Chimney flashing or counter-flashing pulling loose
Chimneys settle and move independently from the roof deck, so the metal sealing that joint separates gradually and needs to be reset into the mortar joints.
Skylight flashing kit or glazing seal wear
Older skylights commonly fail at both the flashing kit and the seal around the glass, which is why replacing the unit with a new kit is often the more lasting repair.
Cracked pipe boots or lifted vent flashing
Rubber boots and vent flashing wear on their own schedule, separate from the shingles around them, and need to be checked individually.
Missing or incorrect step and kickout flashing
When a roof meets a wall, water needs a woven path to the gutter. Without a kickout at the bottom, water gets behind the siding and can rot the wall sheathing over time, which sometimes calls for a broader repair once it's found.
What to expect during the visit
We inspect every flashing line and penetration on the roof, not just the one near the reported leak, since flashing problems in one spot often show up in others too. For a chimney, that means checking the flashing, counter-flashing, and mortar joints, and looking at the attic side for staining around the chimney chase. For a skylight, we check the curb, the flashing kit, and the glazing seal, along with the drywall below it. We repair or reset the flashing, replace what's cracked or failed, and seal and water-test the area before we consider it done.
Related services you may need
If the flashing failure has led to rotted decking or a broader leak, our Roof Repair team can address that alongside the flashing work. Storm damage that loosened flashing may also qualify for Insurance Claim Assistance.
The cost of waiting
Flashing failures are quiet at first, a little staining here, a slightly damp spot there. Left alone, that moisture works into the wall sheathing or the decking around the chimney, and rot doesn't announce itself until it's already spread. A flashing repair that takes a few hours today can turn into a wall or decking repair later if the water keeps finding its way in through the same failed seal.
Why does my chimney or skylight keep leaking after I've had it caulked?
Caulk-only repairs at a chimney or skylight tend to hold for a season or two at most because the underlying flashing has already separated from the joint. A lasting fix resets or replaces the metal flashing itself instead of relying on sealant alone.
How do I know if a pipe boot needs to be replaced?
If the rubber collar around a vent pipe looks cracked, split, or shrunken away from the pipe, it needs replacing regardless of how the surrounding shingles look. Pipe boots wear out on their own schedule, often years before the rest of the roof does.
What affects the cost of a flashing repair?
Cost depends on how many penetrations or transitions need work, whether the chimney needs a cricket added, and whether any decking or sheathing behind the flashing needs to be repaired along with it. A single pipe boot swap is a much smaller job than resetting chimney flashing with hidden rot behind it.
If you've got a leak near a chimney, skylight, or vent anywhere in the Kansas City metro, call Signature Roofing at (816) 727-3349. We'll check every flashing line, not just the obvious one.
- Fast, reliable repairs for leaks, missing shingles, and everyday wear and tear across the Kansas City metro.