Prepare Subgrade and Install Drainage Stone Base
At 0:08 in
think green. #paverdriveway #paverpatio #hardscape #techobloc
What happens here
Based on the video's explanation of having a "base underneath this, our compacted stone, all drainage stone," this step involves preparing the site for the permeable driveway. First, excavate the area to the required depth, which will accommodate the drainage stone base, geotextile fabric, and Eco-blocks. Once excavated, lay down a thick layer of permeable drainage stone (e.g., #57 gravel). Spread this stone evenly across the entire excavated area, ensuring a consistent depth and proper grading for surface drainage (a slight slope is often recommended even for permeable systems). Finally, compact the stone thoroughly using a plate compactor. This compaction is crucial for creating a stable, level, and durable foundation that will prevent settling and maintain the driveway's integrity over time.
Goal: Create a stable and permeable foundation for the driveway.
Tools and materials
- Drainage stone — The permeable sub-base layer
- Excavator or mini-excavator — Large-scale excavation for significant driveway sizes, reducing manual labor
- Leveling string/line — Establishing and maintaining consistent grade and elevation
- Measuring tape — Measuring excavation depth and layer thickness
- Plate compactor — Compacting the drainage stone base to achieve maximum stability
- Rake — Spreading and leveling the drainage stone
- Safety glasses — Protecting eyes during excavation and compaction
- Shovel — Excavating the ground and spreading aggregate
- Wheelbarrow — Transporting excavated soil and drainage stone
- Work gloves — Protecting hands during handling of materials and tools