The 100mm Thermalite Hi-Strength Block 7n (120) is a dense, high-performance aerated block designed for load-bearing applications where greater strength is essential. With a compressive strength of 7.0N/mm², it’s ideal for use in multi-storey buildings, foundations, and areas subjected to higher structural loads.

Lightweight and easy to handle, these 7N Thermalite blocks 100mm help speed up construction without compromising durability or performance. They also provide excellent thermal insulation and fire resistance, supporting compliance with modern building regulations. Whether used above or below damp-proof course level, their versatility makes them suitable for a wide range of internal and external applications.

If you’re looking for a reliable solution for structural masonry, the Thermalite Hi-Strength Block 7N 100mm offers the perfect balance of strength, workability and efficiency. Available now at Mitcham Builders Merchants, it’s a trusted choice for professional builders and developers across the UK.