If you have stone foundation walls, Parging is an option, and sometimes a requirement, depending on the condition of the walls. If they have been neglected for too long, you may have no choice but to parge. Parging is adding a layer of cement over the stone walls, and in the voids between the stones. If the original grout has been compromised too much, you may have more than just a water problem, you may have a potential structural disaster waiting to happen.
Rigid HDPE Panels
This is a good option for poured concrete or block foundation walls with minimal obstructions. Similar to HDPE sheets, the panels are impermeable and leave a clean, bright finish, but have a harder, rigid structure.