Chimney flashing is the metal seal where the chimney meets the roof, and when it fails, water runs into the attic and walls beside the chimney. In Connecticut, heavy rain and ice dams push water under weak flashing faster than most homeowners expect.
Signs of Failing Flashing
- Water stains on the ceiling or wall next to the chimney
- Rust or gaps along the metal
- Dried, cracked roofing cement or caulk
- Daylight or damp insulation in the attic around the chimney
- Bubbling paint on interior walls
Why Sealant Alone Is Not a Fix
Roofing cement is a temporary patch. A proper repair uses step flashing woven into the shingles and counter flashing cut into the mortar joints so the two pieces overlap and shed water.
Materials
- Copper: longest lasting and a premium look
- Aluminum: affordable and lightweight
- Lead-coated copper: flexible around brick
- Galvanized steel: lower cost but rusts sooner
When to Schedule
Fix flashing before the first major storm or snowfall. An inspection of the crown and cap at the same visit prevents a second leak from showing up next season.
Why Flashing Fails
- Roofing cement dries and cracks within a few years
- Thermal movement pulls metal away from the brick
- Nails rust and let flashing lift
- Incorrect installation without counter flashing
Cost and Timing
Replacing flashing takes a few hours to a day, depending on chimney size. Copper costs more but lasts far longer. Doing the work before winter prevents ice dams from forcing water behind the metal.
Frequently Asked Questions
Can flashing be repaired or must it be replaced
Small gaps can be sealed, but failing flashing should be replaced.
Does the roofer or the mason fix it
A chimney technician who works on masonry and roofing details is ideal.
How do I know it is the flashing
Leaks that appear only during wind driven rain often point to flashing.
Local Help and Related Reading
Our crews handle chimney sweeps in Stamford, chimney repair in Norwalk, chimney caps in Fairfield and chimney cleaning in Westport. Browse every town on our service areas page or our services.
More to read: Chimney Cleaning Cost in Connecticut: What to Expect, Chimney Crown Repair in Connecticut, How to Choose a Chimney Sweep in Connecticut.
For wider guidance, see the EPA Burn Wise program, the U.S. Department of Energy and CT DEEP.
