Hardscape Installation
Interlocking pavers, retaining walls, dry-laid stone, concrete mixing, geotextile fabric, and permeable paving.
- Describe the full interlocking paver installation sequence from excavation to sealing
- Identify retaining wall height limits and engineering requirements
- Explain the role of geotextile fabric and polymeric sand in hardscape construction
- Compare dry-laid stone, concrete, and permeable paving applications
Lesson 1
Interlocking Paver Installation Sequence
The Installation Process
Interlocking paver installation follows a precise sequence. Each step must be completed correctly for the finished surface to remain stable, level, and well-drained for decades.
Base Material
The recommended base material for interlocking paver installation is crushed granular aggregate (clear stone base). The base provides structural support, distributes load, and promotes drainage. Total base depth depends on soil conditions and expected traffic - typically 15-20 cm for pedestrian patios and 25-30 cm or more for driveways.
The base is installed in lifts (layers) of 10-15 cm, with each lift compacted using a plate compactor before the next layer is added. Compaction in lifts is essential for achieving uniform density throughout the base.
Bedding Layer
The bedding layer sits on top of the compacted base and provides a smooth, level surface for placing pavers. The recommended thickness for the bedding layer is 25-38 mm (1-1.5 inches) of coarse concrete sand. The bedding sand is screeded to a uniform thickness using pipes or rails as guides.
The paver base material is crushed granular aggregate, compacted in lifts. Bedding sand thickness is 25-38 mm (1-1.5 inches). Compact the base in lifts for uniform density.