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Interlocking Concrete Blocks - Melbourne (Basalt) Stone | Pentablock

GST included

PENTABLOCK® in Melbourne (Basalt) is an unique interlocking vertical construction block system with a Natural stone option. These blocks feature a patented design with a simple rebate joint and mortarless quick and easy construction process. PENTABLOCK® creates pure vertical walling used for all applications in the construction industry including retaining walls, feature walls, domestic and commercial construction, swimming pools, fencing, and more. PENTABLOCK® will soon take over from the traditional construction methods as it's quicker, stronger and looks amazing with a range of natural stone options to choose from.

The Melbourne (Basalt) Stone Series is crafted with a 100% natural stone veneer, these modular concrete blocks boast a simple rebate joint, eliminating the need for messy mortar. You can now achieve the work of a skilled stone mason effortlessly.



  • Dry Stack system
  • Rapid construction
  • Construction time up to 75% faster than traditional methods
  • Up to 4 hour fire rating
  • Cyclone rated
  • Unique interlocking design
  • Significantly reduces mess on site
  • Comes in many colours and stone options
  • No tanking or waterproofing is required in some applications
  • 25% stronger than traditional masonry construction
  • Easy to render with no moisture lines from mortar joints

PENTABLOCK Walling System is designed in accordance with AS3600 Concrete Structures and AS3700 Masonry Structures and is suitable for all forms of construction work in the commercial, civil, industrial and residential construction industries. 

Melbourne (Basalt) Stone Block Specifications

  • Block Size
    • Width/Depth: 165mm
    • Internal: 100mm
    • Full Block: L 405 x W 165 x H 205 - Units per m2: 12.05
    • Full Corner Right: - L 363 x W 165 x H 205 - Units per m2: 9.26
    • Full Corner Left: L 363 x W 165 x H 205 - Units per m2: 9.26
    • Half Block: L 202 x W 165 x H 205 - Units per m2: 24.39
    • Half Corner Right: L 165 x W 165 x H 205 - Units per m2: 14.71
    • Half Corner Left: L 165 x W 165 x H 205 - Units per m2: 14.71


The PENTABLOCK Walling System is suitable for many residential, commercial and industrial applications such as:

  • Interior feature walls
  • Steps and stairs
  • Pillars & Column’s
  • Landscape features
  • Underground tanks
  • Letterboxes
  • Fireplaces
  • Retaining walls
  • Basement and exterior walls
  • High strength load bearing walls
  • Construction where high strength cyclone ratings are required
  • Multi story commercial and residential construction
  • Common dividing walls and boundary walls
  • Swimming pool construction
  • Fencing