Fixing and buying guide
Build Bloc 100mm Medium Dense Concrete Block 7N - 440mm x 215mm x 100mm
What this product is and who it is for
Medium dense concrete blocks are engineered masonry units designed for applications demanding high load bearing capacity combined with good acoustic insulation. The 7N designation indicates the compressive strength rating. These blocks suit builders and serious DIY customers undertaking cavity wall construction, partition walls, and structural brickwork in both internal and external locations. They are particularly valuable where sound insulation and fire resistance are design considerations.
- Suitable for internal and external load bearing applications
- Ideal for cavity wall and partition wall construction
- Lighter than solid dense blocks, reducing handling fatigue
- Excellent fire resistance and acoustic performance
- Manufactured to BS EN 771-3 standards
Sizing and pack contents
Each block measures 440mm length by 215mm height by 100mm depth. This is a standard metric block size widely used in UK construction. Blocks are typically supplied in packs; confirm the quantity per pack and delivery arrangements with your merchant, as pallet configurations vary by supplier.
- Dimensions: 440mm x 215mm x 100mm
- Standard metric sizing for UK masonry work
- Confirm pack quantity and delivery options before ordering
Compatibility and installation preparation
These blocks are designed for use with standard mortar mixes and are compatible with conventional masonry construction techniques. Before installation, inspect blocks for damage and ensure the base course is level and properly prepared. Check that your mortar specification aligns with BS EN 771-3 requirements and that you have appropriate scaffolding, levels, and laying tools ready. Ensure adequate site storage with weather protection to prevent moisture absorption prior to fixing.
- Use with standard mortar mixes suitable for medium density blocks
- Prepare level, stable base courses before commencing
- Inspect all blocks on site for visible damage
- Store blocks under cover to prevent weather damage
- Ensure you have appropriate tools: levels, trowels, and scaffolding
Key performance benefits
The medium dense composition delivers superior acoustic performance compared to lighter block types, making these blocks particularly valuable in noise-sensitive applications. Fire resistance is excellent, supporting building regulation compliance. The reduced weight relative to solid dense blocks makes them easier to handle and lay, improving productivity on site without compromising structural performance or durability.
- Excellent acoustic insulation properties
- High fire resistance rating
- Lighter than solid dense blocks for easier handling
- Consistent quality from state of the art manufacturing
- Durable and resilient for long service life