Retaining Walls (Allan Block / Alum Block)

Take Control of Your Landscape 

Sloped yards can be a major challenge for BC homeowners. Without proper support, hillsides can erode, water can pool against your home, and large portions of your property can become unusable. Retaining wall construction is the best way to reclaim your land, create tiered garden beds, and provide essential structural support to your landscape. 

At Onsite, we specialize in the installation of Allan Block and Alum Block retaining walls. These systems are industry favorites because they combine incredible strength with a clean, modern look that fits perfectly in any residential or commercial setting. 

Allan Block vs. Alum Block 

  • Allan Block: These are high-performance concrete blocks designed for gravity walls or reinforced structures. They are excellent for heavy-duty support and come in various textures and colors to match your home’s exterior. 
  • Alum Block: Known for their lighter weight and ease of installation in specific contexts, these are often chosen for decorative garden walls or smaller residential tiers where a sleeker finish is desired. 

Engineering for Longevity 

A retaining wall is under constant pressure from the tons of soil it holds back. If a wall isn’t built correctly, it will eventually “lean” or collapse. Our team ensures every wall we build is engineered for success: 

  1. Solid Footing: We start with a compacted trench to ensure the first course of blocks is perfectly level and stable. 
  2. Backfill & Drainage: We use clear-crush gravel behind the wall and install perforated drainage pipes (weeping tile) to prevent hydrostatic pressure from building up behind the blocks. 
  3. Reinforcement: For taller walls, we use geogrid reinforcement to lock the wall into the soil bank for maximum security. 

Reclaiming Your Space 

Beyond the structural benefits, retaining walls allow you to turn a useless slope into a series of flat, beautiful tiers. Imagine turning a steep hill into a vegetable garden, a flat play area for the kids, or a series of flower beds that add layers of color to your yard. 

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