Just like AB Stones the hollow core in the AB Classic makes them easy to handle, promotes drainage and becomes rock solid when filled. The same patented inter-locking front lip creates a built in setback and eliminates the need for pins, clips or mortar.

Features:

• The 6 degree setback provides perfect fit and finish.
• Built in drainage, interlock and engineering.
• 6 degree batter minimises wall footprint and allows for the best utilisation of land.

Typical Gravity Wall installation:

1. Bury the first course of Allan Blocks at least 150mm below ground level
2. Level and compact 150mm layer of base stone in a 300mm deep trench
3. Compact backfill soil and drainage stone after each course of block is installed
4. Fill block cores and 300mm behind blocks with graded stone