Exterior waterproofing is a method of preventing water from entering a building or structure by applying a waterproof barrier to the exterior of the foundation walls. This is typically done during the construction phase, but can also be done as a retrofit to an existing building.

The process of exterior waterproofing typically involves excavating the soil around the foundation walls to expose the surface. The walls are then cleaned and inspected for any cracks or defects that need to be repaired. Once the walls are repaired and cleaned, a waterproof membrane or coating is applied to the exterior surface of the foundation walls. This membrane can be made of various materials such as asphalt, polymer-modified asphalt, rubberized asphalt, or polyurethane.

In addition to the waterproof membrane, exterior waterproofing may also include the installation of a drainage system around the foundation walls. This system is designed to capture and divert water away from the foundation, preventing it from building up and causing hydrostatic pressure that could lead to water infiltration.

Exterior waterproofing is a highly effective method of preventing water damage and keeping your home or building dry. It is typically more costly and time-consuming than other waterproofing methods, but it provides a long-lasting and reliable solution. It is important to consult with a professional waterproofing contractor to determine if exterior waterproofing is the right option for your building and situation.