The duration of excavation work to deepen an existing basement (underpinning) typically ranges from 4 to 8 weeks. For larger or more complex projects, it can extend to 10 to 12 weeks.
Key factors that affect the timeline include:
- Basement size: larger spaces take more time to excavate.
- Desired height increase: greater depth requires more steps and structural support.
- Soil conditions: clay, rock, or unstable soils require specialized methods.
- Obstructions: plumbing, old foundations, or existing piles may slow progress.
- Site accessibility: limited access can delay logistics and material handling.
- Weather conditions: rain or winter conditions may cause delays.
A detailed project schedule is always provided before work begins. For a customized timeline based on your home, contact Heneault Gosselin.