Lignacite concrete blocks are fine textured and available with a paint grade or fair face finish. Manufactured to BS EN 771-3, Lignacite blocks are robust and durable with a technical performance that makes them well-suited to most applications.

The blocks’ unique mix design (consisting of cement, fine aggregates and recycled graded-wood particles) accounts for their outstanding technical performance.

The 140 mm width version (known as Lignacite SP; specified separately) has a specially formulated mix that optimises the block density to produce a solid block with a unit weight of less than 20 kg. There is a slight colour difference between Lignacite SP and 100 mm Lignacite blocks.

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.

Mortar

Generally, the mortar type for work above ground level should be designation (iii) / Compressive Class M4. Stronger mixes may be required if blocks are used below ground.

Movement

Vertical movement joints should be considered in accordance with masonry design codes and the recommendations of Published Document PD 6697:2019, at 6.0-8.0 metre spacings. In areas of raised stress, such as above and below openings in external walls, the blockwork may need to be reinforced to restrain movement.

Design

The design of walls using Lignacite blocks should be in accordance with relevant design standards, including BS 8103-2, BS EN 1996-1-1:2022 and the requirements of the Building Regulations.

EPD Lignacite 100 7.3