Exterior Waterproofing: Stop Water at the Source
Exterior waterproofing involves applying waterproof membranes and drainage boards directly to the outside of your foundation walls, preventing water from ever reaching the concrete.
Exterior waterproofing is the most comprehensive approach to keeping water out of your basement. By excavating down to the foundation footing and applying a waterproof membrane to the exterior wall surface, water is physically blocked from entering the concrete.
A drainage board is installed over the membrane to create an air gap that channels water downward to a perimeter drain at the footing. This system works with gravity to keep water moving away from your foundation.
Exterior waterproofing is often recommended for new construction or during major foundation repairs when the exterior wall is already exposed. For existing homes, it requires excavation around the perimeter, which is more involved but provides the most thorough protection available.
Key Benefits
- Physically blocks water from reaching foundation
- Works with gravity for reliable drainage
- Most comprehensive waterproofing approach
- Protects the concrete from moisture damage
- Ideal for new construction or major repairs