Internal leaves and partitions commonly use 100mm thick solid blocks in standard 440mm × 215mm formats, while external walls or higher load areas may require thicker or higher strength units depending on structural design.
Practical Guide to Solid Concrete Bricks & Blocks
This range covers concrete bricks and dense, concrete blocks commonly used for structural walling. These units suit inner leaves, partitions and small retaining or garden walls, and can also be combined with beam and block flooring where a stable bearing surface is required. Their consistent dimensions help create even courses, especially when laid with Ready Mixed Cement for uniform joints and reliable set times.
These products are used above and below the damp course for load bearing walls, piers and boundary structures. In cavity wall construction, the inner leaf can be paired with Cavity Wall Insulation to improve thermal performance, while stainless Wall Ties help secure both leaves and maintain cavity alignment. Where rising damp must be controlled, a Damp Proof Course is installed across supports and openings, and structural spans such as windows or doorways are completed with appropriate Lintels. This combination supports straight, stable blockwork in both new builds and extensions.
A standard 440mm × 215mm × 100mm solid block course typically uses around ten blocks per square metre with 10mm mortar joints. Dense aggregate units offer good acoustic mass, dependable fix holding and predictable movement characteristics. For external walls, practical guidance usually recommends blocks with higher compressive strength or density to reduce the risk of frost related damage, supported by correct detailing and moisture management. Mortar selection varies by location, with general mixes such as 1:1:6 for above DPC work and stronger proportions for below DPC courses. Blocks should only be lightly dampened in hot, drying weather to prevent rapid suction; saturated units are avoided to ensure a consistent bond.
Concrete Brick & Block FAQ's
A standard 440mm × 215mm × 100mm block laid with 10mm joints typically results in about ten blocks per square metre, plus an allowance for cuts and waste.
A 1:1:6 (cement:lime:sand) mix is widely used above DPC for general workability and durability, while stronger mixes are preferred for foundations or exposed locations.
Concrete blocks can be cut using a masonry saw, angle grinder with a diamond blade, or a bolster and club hammer for smaller adjustments. Mark the cut clearly, support the block securely, and work slowly to avoid chipping. For repeated cuts, a powered saw gives a straighter, more accurate finish.
Common tools include a brick trowel, spirit level, line pins and string line, club hammer, bolster, bucket trowel, jointing tool, and a mixing bucket or cement mixer. A rubber mallet is useful for tapping blocks into line without damaging the surface.