Code 4 - Superstructure Blocks – Hemelite

The blocks used in the inner leaf of the cavity wall of the Code 4 Home are Tarmac’s Hemelite blocks. The dimensions used are 440mm long x 100mm wide x 215mm high.

The external wall is a conventional cavity wall consisting of Tarmac Hemelite lightweight aggregate blocks (100mm) bedded in Tarmac ready-to-use mortar and finished with 12.5mm plasterboard drylining. The cavity is however 150mm and partially filled to 100mm with foil faced rigid polyisocyanurate (PIR) insulation board. The brick finish is Ibstock Hardwicke Lenton light multi bricks. The walls are designed to achieve a U-value of 0.20 W/m2K.

Hemelite lightweight aggregate blocks are suitable for use in walls above and below ground and in block and beam floors. They have a proven high level of technical performance.

Further information


Open the Hemelite Brochure (pdf, 1596 kb) or see more information on the Tarmac website (new window).


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Fact 8

Concrete is acoustically versatile but also it can be moulded to any size, shape and texture.  It can be used to deflect or absorb noise.  This makes it a good acoustic host for music but also an effective sound barrier alongside busy roads.

See the more information on Why Masonry?