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Construct a 90-Degree Corner

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How to Build a Retaining Wall

What happens here

When constructing a 90-degree corner, both faces of the blocks will be exposed, so it's essential to maintain a consistent texture. Instead of using a chop saw, which creates a smooth cut, use a chisel and a mallet to score the top face of the block where the cut is desired. Continue tapping around the block along the scored line until it snaps. This method provides a rough, textured face that matches the existing blocks, ensuring a seamless aesthetic transition at the corner. Attempting to cut with a chop saw will result in an unmatched smooth face.

Goal: Create a seamless 90-degree corner while maintaining block face texture.

Tools and materials

  • Chisel — Scoring and splitting the blocks
  • Mallet — Tapping the chisel to break the blocks
  • Retaining Wall Blocks — The blocks to be cut for the corner
  • Speed Square — Guiding the scoring line for accurate cuts