There are many different types of Waterproofing Systems.
No matter what condition your basement walls are, if there's a problem, EVERDRY can fix it.
Exterior
In this method, the contractor uses a backhoe to dig around the outside of the home’s foundation all the way down to the footing. 
After the wall is completely exposed, the original footer tiles are checked and, if needed, replaced. The wall is then sealed with waterproofing materials, such as tar and plastic. Gravel is poured over the pipe and the dirt is replaced in the hole.
Interior
Inside drains may be used to waterproof from the inside of the basement. Typically, this involves opening the 
floor around the perimeter of the basement, digging a trench, and installing pipe and gravel around the footer. The contractor also installs 'weep-holes'—small, one-half- to three-quarter-inch holes in each block cavity—to release any water that may be trapped. The holes are covered with a plastic molding or styrene panel before the floor is re-concreted.
Multi-step
This is the best of both worlds. The only complete waterproofing 
system. This is what EVERDRY recommends. This is the permanent solution. Water is taken away before it enters the basement. Plus, with EVERDRY's EZ Breathe™, your home's air is refreshed toxins flushed from your environment.