Effective in resisting rain penetration, ________ joints are recommended where heavy rains and high winds are likely to occur.

Concave joints are specifically designed to provide effective resistance against rain penetration, making them particularly suitable for areas that experience heavy rains and high winds. The shape of a concave joint creates a deeper cavity that allows water to flow down and away from the joint, rather than penetrating into the masonry or construction material. This curvature deflects water away from the surface behind the joint, thereby reducing the risk of moisture infiltration and enhancing the durability and longevity of the structure.

Additionally, concave joints tend to be aesthetically pleasing, which can also be a factor in design considerations. Their effectiveness in preventing water intrusion makes them a preferred choice in climates subject to severe weather conditions. This design feature is critical for maintaining the integrity of buildings susceptible to damage from moisture, especially in regions prone to rainstorms and wind-driven rains.