Chimney Leak Checklist: Crown, Masonry, Cap, and Flashing

What to check first

• Check the crown for cracks and damaged edges.
• Look at masonry joints and the cap from a safe location.
• Inspect the roof flashing and its upper termination.

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.

From the project archive