Hemelite Medium Dense | 7.3N

Hemelite Medium Solid Dense 7.3 N bridges the gap between lightweight aircrete and heavy dense blocks. Its reduced density improves thermal efficiency and sound insulation while easing manual handling, yet it still delivers a impressive 7.3 N/mm² compressive strength. Designed for use in load-bearing walls above and below the DPC as well as beam and block floor infill, it’s a versatile solution for both internal and external masonry.

Weighing around 14.1 kg per block, Hemelite Medium Solid Dense 7.3 N offers a handling advantage over traditional dense blocks while retaining its structural strength. Its thermal conductivity of approximately 0.51 W/m·K helps meet Part L energy targets when combined with a 150mm cavity and insulation, and its Class A1 non-combustible rating under BS EN 13501-1 provides up to 60 minutes of fire protection in wall constructions.

For external, bellow DPC blockwork 7.3N blocks or above are required.

Key Features & Benefits:

• Lightweight Yet Strong: Weighing less than traditional dense blocks, the Hemelite 7.3N is easier to handle and transport, yet maintains the same high strength and durability for reliable performance.
• Efficient and Safe: The reduced weight ensures quicker and safer laying, helping to save time, reduce labor costs, and minimise the risk of injury on-site.
• Versatile Applications: Suitable for both internal and external walls, this Hemelite block is ideal for use in load-bearing applications, beam and block floors, and various general construction projects.
• Fire Resistance: With excellent fire-resistant properties, this block offers added safety for structures, ensuring reliable protection in the event of a fire.
• Superior Acoustic Performance: Provides good sound insulation, contributing to quieter, more comfortable indoor environments.
• Customisation for Thermal Performance: Achieve your desired thermal performance with the addition of insulation, making it flexible for different project needs.

Technical Specifications:

• Dimensions (L×H×W): 440×215×100 mm
• Compressive Strength: 7.3 N/mm²
• Dry Density: 1450 kg/m³
• Thermal Conductivity: 0.51 W/m·K
• Fire Rating: Class A1 (non-combustible); 60 min fire resistance in wall constructions
• Sound Insulation: 44 dB reduction in partition walls (meets Part E)
• Unit Weight: 14.1 kg per block
• Blocks per Pack: 72 blocks (7.2 m² coverage)
• Mortar Joint: 10 mm recommended (BS 8000-3 compliant)
• Standards & Marking: BS EN 771-1 manufactured; UKCA marked
• Moisture Management: Requires external render or cladding; not for fair-faced exposure