POSITIVE SIDE vs. NEGATIVE SIDE for Below-Ground Basement Wall Waterproofing Do you experience recurring leaks, damp basement walls, or moisture problems in below-ground structures? That’s often caused by water pressure from soil and groundwater pushing into concrete. When waterproofing is applied only on the inside, water has already entered the structure—leading to cracks, corrosion of steel reinforcement, and long-term damage. The best solution? Positive side waterproofing using the Buildrite