Waterproofing Inside Benefits
The internal system is used for three main reasons, one the area cannot be addressed from the exterior due to confined space or no access. The other is the water problem is not a foundation leak but a hydrostatic pressure problem, which simple means the ground water under the concrete slab raises up and down and cause the water to penetrate through the basement slab. The other is cost effectiveness for unfinished living areas.
Waterproofing the exterior foundation walls will give you a structurally sound foundation and eliminates the amount of deterioration that will occur on your foundation walls.