Chimney Counterflashing & Repointing

The upper edge sits in a groove cut into the masonry. Mortar closes the joint above the metal.

Project partner: Stone Art Masonry
Project: Brick chimney repair
Scope: Metal counterflashing & repointing

The problem

At the roofline, the old counterflashing was bent at the corners and pulling away from the brick. Those gaps gave rain a path behind the metal and put the roof around the chimney at risk of leaking. Higher up, pieces of mortar had fallen out, leaving open joints where water could get in and further weaken the brickwork.

The solution

RoofJay replaced the flashing around the base of the chimney, cutting a groove into the masonry and inserting the upper edge of the new counterflashing into it. The joint was finished with mortar, giving the metal a clean line against the brick without relying on a bead of caulk. Stone Art Masonry also repointed the entire chimney and repaired the crown.

The repair in detail

**01 · Chimney before the repair**The original brown flashing is visible where the chimney meets the roof.

**02 · Bent flashing**The old metal was bent at the corners and pulling away from the chimney.

**03 · Gaps behind the metal**Along the side, the loose upper edge left an opening for rain to get behind the flashing.

**04 · Deteriorated mortar**Pieces of mortar had broken away, leaving gaps between the bricks.

**05 · New flashing at the base**Before installing the counterflashing, RoofJay replaced the original backpan flashing because it did not meet code requirements. The new backpan ties into the shingles on the uphill side of the chimney.

**07 · Repointed joints**Stone Art Masonry replaced the loose mortar throughout the chimney.

**08 · Chimney after the repair**From this angle, you can see the repointed brickwork and the new black flashing around the same chimney.

Chimney Counterflashing & Repointing

The problem

The solution

The repair in detail

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Let’s talk about your project.