One major avenue for water to enter your home and cause damage is at the joint.
Repairing cracks in chimney crown mortar.
After a couple of years they crack.
Caulk around the flue and the crown.
How to repair a chimney crown step 1.
Concreting cracks if you do not want to make a new crown you could simply fill up the cracks that are visible.
Patch cracks in the large crown area.
New mortar is smooth and solid but as the seasons go.
Restore the brick joints to begin restoring the brick mortar joints a process commonly known as tuck pointing first prep the area to ensure good mortar adhesion image 1.
Mortar holds bricks together.
Instructions repoint the chimney brick mortar.