If flooding or heavy rainwater seeps into your walls and flooring, all that moisture can weaken the integrity of your home and put you at risk of structural damage. Waterproofing keeps that water out of your structure and keeps it stronger against damaging floodwaters.
In the end, DIY basement waterproofing is often more trouble than it's worth. Not only is it risky and time-consuming, but it also has the potential to be costly and lead to further water damage issues. It's always best to leave this kind of work to the professionals.