company logo
HeidelbergCement in the United Kingdom

Thermalite® Floorblock

Floorblock is an efficient method of providing insulated floors; it is light in weight and is designed for use with all proprietary T-beams.

Detailing is made simple by the availability of special Floor Endblocks and Coursing Slips in two modular bedding heights for closing at the edge of the floor.

Note: After the Floorblocks have been positioned, before any trafficking or loading is allowed and before any floor finish is commenced, the floor must be grouted with a 1:4 cement/sharp sand composition.

Working dimensions, thicknesses and weights
Floorblock face dimensions (mm)         

440 x 350  

440 x 215  

440 x 540*  

Block thickness (mm) 

100 

100 

100 

Block weight** (kg) 

10.5 

6.4 

16.2 

Floor Endblock face dimension (mm) 440 x 140     
Block thickness (mm) 

150 

175 

 
Block weight** (kg) 

6.0 

7.0 

 
Coursing Slips face dimensions (mm)    215 x 100     
Block thickness (mm) 

40 

65 

 

Properties
Mean compressive strength not less than 4.0N/mm²

Designed thermal conductivity (λ) 0.16W/mK

Specified gross dry density 660kg/m³

*Blocks can be laid to correspond with 540mm beam spacing (660kg/m³ only)
** Block weights are calculated using specified gross dry density, with a moisture content of 3% by weight added to provide the equilibrium value.
Quicklinks