Ultra lightweight, loadbearing units, suitable for general purpose walling applications. Ideal for use in housing and extensions.
For use in housing or extension projects. It can also be used to construct walls in other buildings where there is a requirement to specify blockwork with a low weight, e.g. partition walls on floor slabs. Can be considered for use in the following locations:
The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.
General purpose, lightweight concrete blocks, suitable for walling applications.
The blocks are dark grey in colour with an opened textured surface. Available in 100 and 140 mm widths, solid form only.
Features and benefits:
The mortar type for work above ground level should be designation (iii) / Compressive Class M4. Stronger mixes may be used only with the permission of the designer. Stronger mixes may also be required for work below ground in accordance with PD 6697. Consult manufacturer for details.
Movement joints should be considered in accordance with PD 6697 at approximately 6 m spacings. In areas of concentrated stress, such as those above and below openings, consideration should be given to the use of bed joint masonry reinforcement.
The design of walls should be in accordance with relevant design standards including BS 8103: 2, BS EN 1996-1-1 and the requirements of the Building Regulations.
High thermal insulation, lightweight, Class A1 high level of fire protection
(expanded clay aggregates and other naturally occurring raw materials and cement).
440 x 215 x 100 mm
440 x 215 x 140 mm
E60/297 Proprietary infill blocks
F10/18 Concrete facing blockwork
F10/355 Concrete common blockwork
BSI Kitemark approved to BS EN 771-3.
Fine textured, loadbearing units for facing and general purpose applications.
Medium grey in colour with a fine textured surface.
0.25 W/m·K at 3% moisture content (internal use), 0.28 W/m·K at 5% moisture content (external use).
At 3% moisture content: 100 mm width: 0.40 m²K/W, 140 mm width: 0.56 m²K/W. At 5% moisture content: 100 mm width: 0.35 m²K/W, 140 mm width: 0.50 m²K/W.
Work sizes (length x width x height)
440 x 100 x 215 mm.
Unit weight: 8.7 kg.
440 x 140 x 215 mm.
Unit weight: 12.2 kg.
Net dry density
Reaction to fire
Water vapour permeability
Fibo 850 Concrete Blocks
Sound reduction index
At 100 mm width: 40–42 RW dB (dependent on application); at 140 mm width: 42–44 RW dB (dependent on application).
100 mm: 2–3 hours; 140 mm: 3–4 hours.