Sandbags can be a useful tool for flood control, but they have notable limitations. Their primary advantage is the ability to divert water away from entry points like doors and windows, reducing the likelihood of interior flooding. They are also relatively low-cost, widely available, and easy to deploy with minimal tools.
However, despite these benefits, sandbags are not fully waterproof. Water can seep through small gaps between the bags and even through the bags themselves. Additionally, setting up sandbags is time-consuming and labor-intensive, requiring significant physical effort to fill, move, and stack them correctly. Once saturated, sandbags lose effectiveness, especially during prolonged flooding, and their disposal can become a challenge due to possible contamination from floodwater.