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Pumice Insulation


W.D.L pumice insulation concrete blocks are manufactured to BS EN 771-3. The pumice aggregate is the waste of volcanic ash, which is inert and therefore will not react physically on chemically to outside forces. It is strong and highly thermally efficient. Pumice with its pozzolanic properties continues to harden year after year without any degradation.They are: lightweight easy to lay, chase and cut. It offers an excellent plastering key for plastering, rendering and joining fixings. The physical characteristics of our pumice blocks make them suitable for a wide range of applications in load bearing and non loadbearing internally and externally.

Pumice is a class 1 aggregate and is classified as non-combustible in accordance with B.S. 476 part 4:1970. Pumice starts to degrade to glass above 1200 degrees centigrade thus giving two-hour fire resistance on a 100m configuration. They are a functional block manufactured with a standard finish with average compressive strengths of 3.6 and 7.3 Newtons.

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

Suitable Applications

  • Internal Partitions
  • Outer and Inner Leaves of Cavity Walls
  • Load bearing Walls
  • Inner Leaf of Cavity Walls, when Used in Conjunction with Secondary Insulation External Walls with Render or Cladding
  • Infill Blocks for Beam and Block Flooring.


Pumice Insulation 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.