Flashing Failure
Chimneys, skylights, and valleys are the #1 place roofs leak. We re-flash with proper metal and sealant built to survive New England freeze-thaw.
Understanding Flashing Failure
Most roof leaks don't happen in the open field of shingles: they happen at the transitions: chimneys, skylights, walls, and valleys. That's where flashing does the work, and where it fails first.
Flashing is the metal that seals roof transitions and penetrations. When it corrodes, lifts, or was installed poorly, water pours in at exactly the hardest spots to seal.
Free InspectionWhat CausesFlashing Failure in MetroWest
Freeze-Thaw Movement
Repeated freezing works flashing and sealant loose over New England winters.
Old or Rusted Metal
Aging or improper flashing corrodes and cracks, breaking the seal.
Poor Original Install
Caulk-only or reused flashing from a cheap job fails quickly, proper step and counter-flashing lasts.
Chimney & Skylight Joints
These complex transitions are the most common and persistent leak points.
Warning Signs
- Leaks or stains near a chimney or skylight
- Rust streaks on the roof or siding
- Visible lifted or cracked flashing
- Damp interior walls below roof penetrations
What Happens If You Wait
Failed flashing leaks quietly at transitions, rotting framing around chimneys and skylights and staining interior walls, often blamed on the whole roof when it's really a fixable flashing problem.
How Black LadderFixes It
Proper Metal Flashing
We rebuild with step and counter-flashing in durable metal, not a bead of caulk.
Chimney & Skylight Re-Flash
We specialize in sealing these complex joints watertight and lasting.
Pair with Roof Work
Re-flashing during a roof or skylight project guarantees a seamless, warrantied result.
Flashing FailureRepair Cost, 2026
Reseal or replace a section.
Step + counter-flashing rebuilt.
Re-flash chimney, skylights, valleys.
Flashing is a repair that pays for itself, catching it early avoids framing rot. Free inspection and exact quote. Get your exact quote →
Questions AboutFlashing Failure
What is roof flashing and why does it matter?
Flashing is the thin metal (usually aluminum, copper, or galvanized steel) installed at roof transitions and penetrations to direct water away from vulnerable seams. It's what seals around chimneys, skylights, vents, and in valleys where two roof planes meet, so when it fails, water gets straight into your home.
Why do chimneys and skylights leak so often?
Chimneys and skylights interrupt the flat run of the roof, so they rely entirely on flashing and counter-flashing to stay watertight. In MetroWest, MA the constant freeze-thaw cycles pry that metal loose and crack old sealant, which is why these two spots are the number-one source of roof leaks we find.
Can flashing be repaired, or does it have to be replaced?
It depends on the condition: isolated lifted metal or a failed seal can sometimes be re-secured, but corroded, rusted, or improperly installed flashing needs full replacement with new metal and membrane. Our free inspection tells you which one you're actually looking at rather than guessing.
Is caulk or roofing tar a real fix for flashing leaks?
No, caulk and tar are only a temporary patch. They dry out, shrink, and crack within a season or two, especially under New England freeze-thaw stress, and they often hide a worsening leak underneath. A proper repair re-flashes the area with correct metal and membrane so water is redirected, not just plugged.
How much does re-flashing cost in MetroWest, MA?
Cost depends on the location and how much surrounding roofing must be lifted, so a single skylight or valley re-flash is far cheaper than a full chimney re-flash with masonry work. Black Ladder Group offers free inspections and a written estimate up front, so you know the exact price before any work begins.
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Got flashing failure? Don't wait.
A free inspection today can save thousands tomorrow. Get honest answers from a licensed, insured MetroWest roofer.