Tuckpointing a chimney is the process of repairing and refreshing the mortar joints between the bricks to restore both the look and the integrity of the structure. Over time, weather, moisture, and heat cause the mortar to crack or crumble, which can allow water into the chimney and weaken it. During tuckpointing, the damaged mortar is carefully removed and replaced with new mortar that matches the color of the existing joints, sometimes with a contrasting thin line added to create a crisp, uniform appearance. This not only improves the chimney’s durability but also enhances its curb appeal and can extend its lifespan for many years.