+44 1685 811525

Medium Density


WDL Medium Density Blocks are manufactured to BS EN771-3. Composition of these blocks consists from a mixture of furnace bottom ash, approved lightweight aggregates, ordinary Portland cement and water.

They are a functional block and are manufactured in two finishes, standard and paint grade. The standard finish offers an excellent plastering key for rendering or can dry lined with plasterboards. Our paint grade finish is ideal for walls to receive a range of proprietary paints, the appearance is then of an aesthetic one.

The performance makes our blocks eminently suitable above and below dpc. 7.3Nmm2 and greater should be specified if these blocks are to be used on the external leaf of a cavity wall below dpc level and left unprotected. In addition Medium density blocks are suitable as infill blocks for floor beams, rendering, cladding, party walls (cavity type) and internal partitions. Because of its qualities, high levels of insulation can be achieved when used with a secondary insulation. They also provide excellent properties for sound and fire resistance when used in accordance with the building regulations. Consideration should also be given to these blocks when block units are needed to be below 20KG.

*In regards to our production weights, they are a typical average as due to seasonal and geographical variations they may vary.

Suitable Applications

  • External Walls with Render or Cladding
  • External Walls Below Ground Level / DPC (7.3N/mm )
  • Block & Beam Flooring
  • Eminently Suitable for General Load Bearing Conditions
  • Internal Partitions
  • Inner Leaf of Cavity Walls when used in Conjunction with Secondary Insulation


Medium Density Factsheet

Block types

Solid Block

Blocks which contain no formed voids.

Cellular Block

Blocks which contain one or more formed voids which do not fully penerate the block.

Hollow Block

Blocks which contain one or more formed voids which fully penetrate the block.