Basement Underpinning

• Linear Feet of Foundation: Total length of foundation walls to underpin
• Depth Increase: How much deeper to extend the foundation (typically 2-4 feet)
• Wall Thickness: Thickness of foundation wall (default 8 inches)
• Foundation Type: Type of existing foundation
• Underpinning Method: Method of underpinning
• Soil Condition: Ground conditions affecting excavation difficulty
• Access Difficulty: How difficult is access to the work area
• Include Floor Lowering: Remove and replace concrete floor at new lower level
• Floor Area: Square footage of basement floor (for floor lowering)
• Include Waterproofing: Apply waterproofing membrane to underpinned sections
• Include Structural Engineering: Structural engineer design and inspections
• Include Permits: Building permits and inspections
• Calculation Results: Estimated quantities and costs