Medium density blocks suitable for use in the majority of standard applications. This includes the inner leaf of cavity walls when used with secondary insulation, separating or partition walls, infill blocks in beam and block flooring systems, and externally where a finish is applied.
Acoustics
The density of Fenlite and Fenlite 1500 blocks gives them excellent sound insulation properties. When laid to form a cavity sound separating wall, they will achieve the required mass as given in the Building Regulations and Robust Details.
Flooring Fenlite and Fenlite 1500 blocks are suitable as in-fill blocks for beam and block flooring systems. They should be specified as ‘for flooring’, in order that the correct manufacturing base is sourced.
Strength
The strength of all Fenlite blocks dictates their application in exposed conditions. Block strengths of 7.3 N/mm² and greater should be specified if they are to be used on the outer leaf of cavity wall below dpc level and left unprotected. In all other normal situations 3.6 N/mm² blocks would be suitable.
Thermal Fenlite and Fenlite 1500 blocks, in conjunction with suitable thicknesses of insulation, are able to reach high levels of thermal insulation.
Fire
Concrete is an excellent fire resistant material. Fenlite and Fenlite 1500 blocks are manufactured using Class 1 aggregates which provides the highest level of fire resistance for a given size.
Fenlite Material Properties
Mean compressive strength:
Solid: 3.6, 7.3, 10.4 N/mm²
Coursing units: 10.4 N/mm²
Thermal conductivity (W/m.K): internal 0.45, external 0.48
Dry density: 1350 kg/m³
Working dimensions:
Standard: 440 x 215mm
100mm coursing unit: 215 x 65mm
140mm coursing unit: 440 x 65mm
Fenlite block widths and weights
Block width (mm) |
Form |
Block weight*(kg) |
Wall weight**(kg/m²) |
100 |
Solid |
13.2 |
142 |
140 |
Solid |
18.4 |
199 |
| 215 x 65 x 100 |
Coursing |
1.9 |
150 |
| 440 x 65 x 140 |
Coursing |
5.4 |
209 |
Fenlite 1500 Material Properties
Mean compressive strength:
Solid: 3.6, 7.3, 10.4 N/mm²
Coursing units: 10.4 N/mm²
Thermal conductivity (W/m.K): internal 0.48, external 0.52
Dry density: 1500 kg/m³
Working dimensions:
Standard: 440 x 215mm
100mm coursing unit: 215 x 65mm
140mm coursing unit: 440 x 65mm
Fenlite 1500 block widths and weights
Block width(mm) |
Form |
Block weight*(kg) |
Wall weight**(kg/m²) |
100 |
Solid |
14.6 |
157 |
140 |
Solid |
20.5 |
219 |
| 215 x 65 x 100 |
Coursing |
2.2 |
164 |
| 440 x 65 x 140 |
Coursing |
6.0 |
223 |
*Block weights are calculated using specified dry density, with a moisture content of 3% by weight added to provide the equilibrium value.
** Weight of erected wall (including mortar). Add 11 kg/m² per side for a 2-coat lightweight plaster finish (24 kg/m² for dense plaster).