Chimney Repointing or Sealing: Which Problem Are You Fixing?

What to check first

• Check whether mortar is missing or only a transition is open.
• Inspect crown cracks separately from wall joints.
• Have loose masonry repaired before applying a surface seal.

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