Person fitting metal flashing at the base of a brick chimney on a shingle roof
Santa Monica, CA · Chimney Flashing Repair

Chimney Flashing Repair in Santa Monica

Chimney flashing repair in Santa Monica fixes one joint: the seam where the chimney passes through the roof. Flashing is the layered metal that covers that seam, and when it rusts, lifts or relies on dried-out sealant, water runs down the outside of the chimney into the ceiling or wall beside it. It is a narrower job than leak repair; the leak page covers tracing water from any source.

Chimney Flashing Repair · Santa Monica

Step flashing, counter flashing and the cricket

1

Proper flashing has two layers. Step flashing is a series of L-shaped pieces woven into the roofing along the sides of the chimney. Counter flashing covers those pieces and is set into a groove cut into the mortar joint, so water running down the brick is directed out over the step flashing.

2

On a wide chimney, a cricket, a small peaked diverter on the uphill side, sends water around the chimney instead of letting it pool against the brick. When any one of these layers is missing, the flashing depends on sealant alone.

Why sealant-only flashing fails first

Some chimneys have a single piece of metal pressed against the brick with a bead of sealant along its upper edge. It works until the sealant dries, cracks or pulls away, which sun and temperature swings make certain.

Adding more sealant is a common repair that buys little. Where counter flashing was never cut into the mortar, the durable fix is to cut the groove and install it properly.

Clay tile roofs and salt-exposed metal in Santa Monica

Where a Santa Monica house has a clay tile roof, the flashing sits under tile that has to be lifted and reset, and tile breaks easily when walked on. That changes how the repair is approached and how the roof is protected while it happens.

Near the ocean, galvanized flashing loses its coating at bends and nail holes and rusts from there. Replacement flashing is often specified in a metal that holds up better, and it must not be paired with a metal that will corrode where they touch.

Tell us where the stain is relative to the chimney, what the roof is covered with, and whether the roof is due for replacement soon. Send the details of the issue and request an estimate for the specific work.

Signs the flashing is the source, and signs it is not

A stain on the ceiling or wall right beside the chimney, rust streaks on the roof below it, lifted metal and cracked sealant all point to flashing.

Water inside the firebox or on the smoke shelf, or dampness high on the chimney breast inside the house, points more often to the crown, the cap or porous brick. If the evidence is mixed, tracing the leak comes before replacing flashing.

What changes chimney flashing repair cost in Santa Monica

Resealing existing flashing and replacing it outright are very different jobs, and most estimates turn on which one is needed.

  • 1Reseal, partial replacement or full new step and counter flashing.
  • 2Roofing type: asphalt shingle, clay tile or a flat roof with a parapet.
  • 3Whether a cricket needs to be added on a wide chimney.
  • 4Metal specified for coastal exposure.
  • 5Repairs to decking or framing that the water has already damaged.
Common questions

Chimney Flashing Repair in Santa Monica: questions

Sometimes. Flashing that is intact but has lost sealant along the counter flashing can be resealed. Flashing that has rusted through, lifted, or was never counter-flashed into the mortar needs replacement to stop the leak for more than a season or two.

Not the question you had? The full FAQ covers more ground.

Santa Monica, CA

More for Santa Monica

Start from chimney and fireplace information for Santa Monica, or read the market-wide page on repairing lifted or rusted flashing.

Related work

References

Requirements and designations change, and they vary by address. These are the authorities to confirm with rather than a statement of what applies to your property.

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Chimney flashing repair in Santa Monica: tell us what you are seeing

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