When to get in touch.
- Recessed, cracked, or missing mortar
- Mortar dust or pieces below the chimney
- Sound-looking bricks separated by deteriorated joints
A considered starting point.
Understand the existing system
Evaluate whether mortar repair is appropriate or if masonry units also need replacement.
Define the right scope
Select a compatible mortar and joint treatment for the existing construction.
Plan the details
Define the areas of work, removal depth, finishing approach, and curing needs.
Before you decide.
True decorative tuckpointing uses a fine contrasting line to create the appearance of very narrow joints. Repointing repairs deteriorated joints. Use a written scope to clarify exactly which treatment is proposed for your chimney.
Your questions, answered.
Can new mortar simply be applied over the old joints?
A surface smear over deteriorated joints may not provide a lasting repair. The preparation and replacement depth should suit the condition of the joints and the masonry system.
How do I know whether I need tuckpointing or rebuilding?
If deterioration is mainly in mortar joints and the structure and units remain sound, repointing may be appropriate. Damaged units, movement, or widespread failure can require a different scope.
Homeowner guidance: Chimney Safety Institute of America. Appliance installation and operation must follow the specific manufacturer’s instructions. Service scope and availability are confirmed before scheduling.
Editorial review: September 24, 2026 · Chimney St. Louis