Lignacrete 140 mm 22.5 N Coursing Blocks

Lignacrete dense concrete blocks are robust and durable with a technical performance that will fulfil most applications. They are manufactured to BS EN 771-3 and are available in standard and paint grade (close textured for direct painting). High strength blocks up to 30 N/mm² are available for demanding, loadbearing designs.

Features and benefits:

• Capable of being finished with all recognised treatments, including plaster, drylining and render, as well as cladding treatments.
• Long service life.
• Removes the need for on-site cutting, which reduces waste and improves productivity.

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. Consult manufacturer for details.

Movement:

Vertical movement joints should be considered in accordance with masonry design codes and the recommendations of Published Document PD 6697, at 6.0 — 7.0 metre spacings. In areas of increased 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 should be in accordance with relevant design standards including BS 8103-2, BS EN 1996-1-1 and the requirements of the Building Regulations.