For moisture resistance, which joint finish is preferred?

• A. Tooled Joint
• B. Beaded Joint
• C. Raked Joint
• D. V-Joint

Answer: (A)

Moisture resistance is best achieved when the mortar joint is compacted and shaped to shed water. A tooled joint achieves this by pressing and shaping the mortar while it is still plastic, creating a concave profile that compresses the joint and fills voids. This concave, packed finish reduces porosity and directs water away from the wall, making it harder for moisture to wick into the masonry. The other finishes—beaded, raked, or V-shaped—leave surfaces that can trap or expose more mortar to water, increasing the potential for seepage and moisture intrusion. So, the tooled joint is preferred because its compact, concave form provides a tighter, more water-resistant joint.