Brick Jointers: Purpose, Patterns, & Practical Applications Words: Mackenzie ClaassenPhotos: MARSHALLTOWNAfter leads have been built and bricks have been laid, it’s crucial to tool the joints before the mortar sets. The tool of choice for this task is a brick jointer, but it can be tricky to decide which one to use. This guide will walk through the purpose of the brick jointer, popular types of jointers and joint patterns, and when certain joint types are preferred.The PurposeTooling mortar joints is a major step in any masonry project. Not only does it seal the joints and lengthen their lifespan, but it also provides an aesthetic appeal. A brick jointer helps compact the mortar, which makes the joints denser and more resistant to water penetration, cracking, and weathering. Plus, by shaping and smoothing the mortar, the wall will have a uniform, polished look. To use a brick jointer, hold the handle and firmly “strike” the joint, then run the jointer along the joint to compress the mortar for a smooth, professional finish.Jointers and PatternsBrick jointers are generally designed with different joint sizes on each end for efficiency. The type of joint you choose affects both the appearance and performance of the joint. Common jointers include concave, convex, slicker, raker, V, and grapevine, and each one produces a different joint pattern.Concave Jointer This type of brick jointer creates an inward curve in the mortar. Not only is it a popular choice among masons, but it is highly effective for weatherproofing because the concave shape creates a runoff for water.Convex Jointer On the contrary, the convex brick jointer leaves a rounded, outward curving joint, which does expose more of the mortar surface. This joint type is common in warmer climates where there is little concern for freeze-thaw cycles.Slicker A slicker leaves a smooth, flat surface on the mortar joint, also known as a flush joint. Holding it at a slight angle will help with water runoff.Joint Raker A joint raker looks different from a typical brick jointer. It has wheels and an adjustable masonry nail. This tool creates a consistent, clean joint and is especially useful when tooling joints across extended sections. The adjustable masonry nail determines the depth of the joint and should be used in a specific way: the side of the nail with the head should always be used, not the pointed side.V-Shaped Jointer This type of brick jointer creates a joint that reflects its name: an indented V-shaped joint that is sharp and angular. This joint type is ideal for decorative appeal as well as modern architectural projects.Grapevine Jointer Lastly, using a grapevine jointer provides a joint with a distinctive groove in the center of the mortar. It adds visual interest to a wall and helps enhance decorative appeal.Practical ApplicationsThe choice of jointing style often depends on regional climate conditions. In areas prone to heavy rainfall, jointers that create effective water runoff are preferred to help prevent moisture penetration and weather damage. Regions with more stable or dry climates may favor decorative joints that enhance visual appeal without sacrificing durability. For example, builders in New England often use concave jointers for their superior weatherproofing capabilities, while those in the Mid-Atlantic region commonly choose grapevine joints to achieve a more traditional, decorative look. In the Southern states, convex jointers are popular due to their suitability for warmer climates and their smooth, clean finish that complements a variety of masonry styles. Choosing the right brick jointer and joint style is essential for both the durability and appearance of any masonry project. By understanding how each tool and pattern performs in different environments, masons can achieve long-lasting, visually appealing results that stand up to the elements while enhancing the overall quality.About: Technical Talks
