Durox Coursing Bricks & Slips

Durox is a modern construction material, whose versatility, light weight, thermal and acoustic properties make it the ideal solution for a wide variety of applications in all types of building.

Durox can be used below ground in foundation walls, in suspended beam and block floors and in all types of internal and external walls. It provides many benefits for specifiers and contractors making it the natural choice where blockwork is specified.

Durox Coursing bricks are used to avoid thermal bridging and minimise wastage.

Durox Coursing slips are for use with Floor blocks to reduce thermal bridging.

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  • Infilling over Lintels
  • Infilling between floor joints


  1. Low unit weight

    The light weight of Durox means more blocks per load, resulting in more environmentally-friendly transportation. 

  2. Fast building blocks

    Independently monitored trials have demonstrated that Durox Supabloc is over 20% faster to build with than conventional size aircrete blocks and over 30% faster than dense blocks.

  3. Easy to work

    Cutting, chasing and finishing are all straightforward and quick to achieve using standard tools.  

  4. Excellent acoustic and thermal performance

    Good U-values and Rw values, as well as Robust Details help specifiers more easily meet or exceed Code for Sustainable Homes and BREEAM requirements.

  5. Mortar Saving

    Due to fewer mortar joints, mortar savings of up to 22% can be made when compared to conventional size blocks. 

  6. Size

    At 620mm long, Durox is 40% longer than conventional size blocks, meaning they lay at 7 per m2 including mortar joints. 

  7. Reduces Thermal Bridging

    Minimises thermal bridging, maximises efficiency.  

Application Details

Coursing bricks are designed for use with the range of Durox blocks and should be used to avoid thermal bridging and minimise wastage.

Durox Coursing bricks should be used for general coursing work, in-filling small areas of wall such as between timber floor or roof members as well as sills and over lintels. Their use will eliminate cutting and wastage.

Coursing slips are sppecifically maufactured for use in combination with Floor blocks.

They can be used beneath floor blocks at the bearings where the floor blocks bears directly on to the inner leaf or an internal wall. They eliminate thermal bridging by providing continuity of thermal insulation. In addition, the use of Coursing slips minimises the need for labour-intensive cutting and reduces wastage. Coursing slips are provided in packs of 600.

Technical Properties

Durox Coursing Bricks (3.6n)        
Block Width (mm) 100 115 125 -
Unit weight (kg) 0.68 0.78 0.85 -


Durox Coursing Bricks (7.3n)        
Block Width (mm) 100 115 125 140
Unit weight (kg) 1.01 1.16 1.26 1.41


Durox Coursing Bricks (8.7n)        
Block Width (mm) 100 - - -
Unit weight (kg) 1.07 - - -


Durox Coursing Slips (3.6n)  
Slip Width (mm) 100
Unit weight (kg) 0.41

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