Tuckpointing basics

• Tuckpointing is the process of restoring the outer part of mortar joints in a masonry structure. As the joints age, the mortar will weather and breakdown. This deterioration causes cracks and eventually voids in the joints between bricks. This allows water to penetrate and cause serious damage to the structure.

• Not only can water damage the mortar joints but it can also compromise interior chimney structures such as damper and firebox assemblies. This moisture can lead to water staining on walls and ceilings, stained chimney exteriors, tilted or collapsed chimney structures and settlement issues.

• To insure your home is protected from water intrusion you can follow these steps.

1. Install a strong chimney cap to keep out water and prevent birds and animals from nesting in your chimney.

2. Repair or replace damaged chimney crown.

3. Repair deteriorated mortar joints. Cracked and missing mortar joints provide an easy route for water to penetrate your masonry structure. Having the damaged mortar removed to an appropriate depth and properly filled and tooled will extend the life span and appearance of your structure.

4. Repair or replace flashing. Maintenance of this seal between the roof and the chimney is necessary to keep water out of your home.

5. Waterproof your masonry structures. Masonry materials such as brick are very porous and absorb large quantities of water. Applying a vapor permeable waterproofing agent will allow the chimney to breathe by allowing water that has already penetrated to escape while the brick dries while simultaneously preventing water from entering.