What happens to natural fiber ropes when they are exposed to moisture over time?

Natural fiber ropes, such as those made from jute, manila, or sisal, are particularly susceptible to moisture. When these ropes are exposed to moisture over time, they can become an environment conducive to the growth of mold and mildew. This is because the fibers in natural rope can absorb moisture, creating a damp habitat where these fungi can thrive. Mold and mildew can weaken the fibers and compromise the integrity of the rope, making it less reliable for lifting and rigging applications.

In contrast, while some might think that natural fibers could gain strength with moisture, this is inaccurate as prolonged exposure often leads to degradation rather than enhancement. Additionally, natural fiber ropes do not typically become sticky when wet. Instead, they might lose flexibility and become stiffer as they dry out, and they do not generally shrink. Therefore, exposure to moisture over time primarily results in mold and mildew development, further risking the rope's strength and usability.