Lignacite Concrete Blocks

Lignacite Concrete Blocks

Lignacite Ltd Third party certifications:
  • BSI Kitemark

    BSI Kitemark

    Certificate type

A range of fine textured, loadbearing units, suitable for facing and general purpose applications.

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Suitable for use in commercial and housing projects.

Fair-faced and paint-grade blocks can be used to construct internal walls in commercial, industrial and leisure buildings.

Can be used in the following locations:

  • The inner and outer leaves of external cavity walls;
  • Internal walls including fire break walls;
  • Separating walls including those conforming to Robust Detail specifications;
  • External and internal walls below ground (3.6 N/mm² blocks can be used in both inner leaf and internal walls; 7.3 N/mm² blocks to other locations);
  • Infill units to beam and block flooring.
  • Fair-faced blocks are recommended for internal use.

The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.


A range of fine textured, loadbearing units, suitable for facing and general purpose applications and available in a range of sizes, strengths and grades for total design flexibility.

The blocks are medium grey in colour and consist of a specially formulated mix which reduces density, producing a solid block under 20 kg unit weight.

Features and benefits:

  • Loadbearing.
  • For use internally and externally, above and below ground.
  • High levels of air tightness, sound insulation and fire resistance.
  • Credits available under BREEAM and Code for Sustainable Homes.
  • CE marked to BS EN 771-3.
  • Can be used to satisfy the requirements of Part L of the Building Regulations.

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.

General information






Medium density aggregate concrete.






440 x 215 x 70 mm

440 x 215 x 90 mm

440 x 215 x 100 mm

440 x 215 x 140 mm

440 x 215 x 190 mm

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Uniclass 2015

Pr_20_93_52_01 Aggregate concrete blocksPrimary


E60/297 Proprietary infill blocks

F10/18 Concrete facing blockwork

F10/355 Concrete common blockwork

Specification data - Aggregate concrete blocks Enhanced data


To BS EN 771-3.

Block description

Fine textured, loadbearing units for facing and general purpose applications


Medium grey in colour with a fine textured surface.


Cellular (Group 2).

Hollow (Group 2).

Solid (Group 1).

Solid SP (Group 1).

140 mm width only. Please note there is a slight colour difference between the traditional block and the Lignacite SP.

Compressive strength


Mean value

3.6 N/mm².

7.3 N/mm².

10.4 N/mm².



Thermal conductivity

0.111–0.258 m²K/W depending on width.

Recycled content

Up to 48%.

Work sizes (length x width x height)

440 x 75 x 215 mm.

Solid only. Unit weight: 11.1 kg

440 x 100 x 215 mm.

Solid only. Unit weight: 14.9 kg.

440 x 140 x 215 mm.

Available for all configurations. Unit weight: 19.2 kg (solid), 15.3 kg (cellular/ hollow).

440 x 190 x 215 mm.

Solid and hollow only. Unit weight: 28.2 kg (solid), 19 kg (hollow).

440 x 215 x 215 mm.

Solid and hollow only. Unit weight: 31.9 kg (solid), 20.8 kg (hollow).

Tolerance category




Net dry density

1450 kg/m³.


1570 kg/m³.

All strengths.

Reaction to fire

Class A1.

Water absorption by capillarity

5/15 µ.

Product Reference

Lignacite Concrete Blocks

Face grade


For locations requiring a consistent colour and close textured block face.


For locations where a consistent close textured face is required as a background for direct painting.


For locations where the surface will not be visible e.g. for plastering or use below ground.

Moisture movement

<0.7 mm/m.


1000 J/kg/K.

Sound reduction index

Varies dependent on width and application, consult manufacturer for details.

Fire resistance

Varies dependent on width and application, consult manufacturer for details.

Third-party certification

BSI Kitemark approved.

Environmental information



Recycled content


Digital objects

Platform Compatible Version Certified to

Revit 2016





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