Repointing repairs deteriorated mortar joints in masonry. It does not automatically repair the roof-to-chimney connection. When a chimney leaks, inspect the masonry and the flashing so that each defect receives the right treatment.

What to check first

  • Look for missing or crumbling mortar rather than judging only by stains.
  • Inspect the crown and cap as well as the brickwork.
  • Check whether water can travel behind the counterflashing into the roof assembly.

Inspect masonry and roof flashing separately

  1. Start above the roof line

    The cap, crown, brickwork, and mortar joints are possible entry paths. A surface coating cannot restore loose masonry or a damaged structural component.

  2. Inspect the flashing layers

    Look at the base connection to the roof and the counterflashing that protects it above. Repairing a lower seam will not stop water entering behind an open upper termination.

  3. Match the material to the defect

    Use appropriate masonry repairs for failed mortar or crown damage. For a confirmed roof-flashing defect, verify the exposed materials and current product compatibility before applying a reinforced repair.

Watch the field examples

These archive demonstrations show individual projects. Use the current guidance above and Bergstrom’s published instructions if an older video shows a different product or method. Torch work shown in installation videos is professional work.

Watch Chimney Repointing and Roof Leaks: What Each Repair DoesOpens on YouTube ↗

Product reference: Bergstrom Industries’ published knowledge catalog. Follow the latest product label and safety information. Historical project examples are educational and are not a specification for every roof.