Besides water leak, condensation also causes wetness inside the basement. In this case, coating from inside can prevent the structural damage. This works well in case of minor dampness. Thus, applying inside coatings may work in prevent water intrusion if the leak is relatively small. But if the leaks are large, the method that entails interior coatings seem ineffective. In this case, exterior waterproofing is the best way to ensure that water is not leaking in.
Exterior waterproofing prevents water from entering foundation walls therefore preventing the wicking and molding of building materials. This is the only IBC recognized method used to prevent structural damage caused by water intrusion. But before the 1980s, this was actually damp-proofing in which a degradable-based covering was used to prevent wet. If you are planning build a structure at ground or below the ground level, basement waterproofing services in Philadelphia will be very helpful in preventing structural damage due water intrusion.