Exterior Basement Waterproofing requires excavation to the foundation footing or the bottom of the foundation
Waterproofing the exterior of a foundation completely eliminates water and moisture penetration through the walls into a basement.
For a basement to be waterproofed with no chance of water penetrating the exterior walls, it needs to have protection from sub-surface water for all of the below grade walls. All of this protection must span from grade level down to the foundation footing or a depth deeper than the basement floor.
Exterior Basement waterproofing prevents water from entering foundation walls therefore preventing the wicking and molding of building materials
Prior to the 1980’s much of the original exterior waterproofing was actually damp-proofing using a degradable asphalt-based covering. Today, however, advanced polymer products will completely waterproof an exterior foundation wall.
Such polymer materials have a half life extending to thousands of years, which makes it ideal for a long term exterior waterproofing solution.
This is in contrast to asphalt and tar-based compounds that are affected by soil pH and break down after 10-20 years, or earlier, thus making that type of waterproofing ineffective over time.