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Grey Blocks

Introducing Australia’s Lightest Concrete Block


The Lightweight Alternative


Weighing in at just 11.5 kilograms, Apex Masonry manufactures the lightest structural concrete block available on the Australian market.

At Apex Masonry, we respond to every day challenges with practical innovations that make our products easier to use. Our design team and production engineers have developed a unique mix of basalt, bottom ash and coarse fly ash delivers Australia’s only 11.5kg concrete block unit – increasing strength while reducing weight with 30 percent recycled materials.

Speed up your block laying process by up to 20%

Apex Masonry’s range of concrete blocks offer a complete building system with H blocks, channels, knock-outs and many fractions. Save time and reduce costs while handling a lighter and smarter block with grab points for easy handling.


Load Bearing & High Strength MPA Blocks

To answer every day practical challenges onsite – Apex Masonry high strength blocks are tinted to immediately distinguish them from the standard concrete block range:

  • Unique colour identifier for ease of handling, storage and engineering sign-off
  • Testing certificates for extra strength blocks available on request

Manufactured & Tested to Australian Standards

Apex Masonry concrete blocks are manufactured in accordance with Australian Standard AS/NZS4455.1:2008 and tested under Australian Standard AS4456:2013:

  • Lightweight & loadbearing
  • Fire & sound rating
  • Test reports available


  • Lightweight

  • Block_that_is_compressive_strength_rated

    Compressive Strength rated

  • Acoustic_Rated_block_work

    Acoustic rated

  • Insulation_rated_icon

    Insulation rated

  • Grey_block_that_is_fire_rated

    Fire rated

  • Besser_block_manufactured_with_grab_points_for_easy_handling

    Grab points for easy handling

  • Block_manufatured_with_recycled_materials

    30% recycled materials

  • Grey_block_manufactures_so_it_is_always_straight_&_square

    Always straight & square

  • Masonry_that_is_manufactured_with_innovative_designs

    Innovative designs


  • Load bearing & non-load bearing walls
  • Veneer walling
  • Commercial & residential buildings
  • Retaining Walls
  • Firewalls & Partition Walls
  • Fences & Screen Walls
  • Basement & Carpark Walls
  • Planter boxes
  • Entrance Walls
  • Letterboxes
  • Posts & Piers

  • Grey

Please note: Whilst all care has been taken to provide you with a good indication of colour, you should always sight product samples before use. Due to natural variations in raw materials, colours may vary from the images provided.

Block Formats


Size: See Full Block list

Material: Concrete

How many standard blocks are there to a square metre?

12.5; 2.5 blocks to a lineal metre

How much blockfill is required when corefilling the blocks?

Below are recommendations only - not guaranteed amounts

150mm Standard Blocks - 0.53 m³ of concrete/100 blocks or 1 m³ of concrete/188 blocks.

200mm Standard Blocks - 0.86 m³ of concrete/100 blocks or 1 m³ of concrete/121 blocks.

200mm H Blocks - 0.886 m³ of concrete/100 blocks or 1 m³ of concrete/116 blocks.

300mm Standard Blocks -1.22 m³ of concrete/100 blocks or 1 m³ of concrete/82 blocks.

300mm H Blocks -1.37 m³ of concrete/100 blocks or 1 m³ of concrete/73 blocks.

Are your grey blocks fire rated?

Yes, please see our Fire & Acoustic brochure for more information.

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