Solid Dense Concrete Block (7.2N) 440 x 215 x 140mm
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A solid dense concrete block (7.2N) sized 440 x 215 x 140mm is a heavy-duty building material designed for structural applications in home improvement projects. Its high compressive strength makes it ideal for constructing load-bearing walls, foundations, and beam-and-block flooring. The block offers excellent fire resistance and sound insulation, making it suitable for both internal and external use where durability and safety are important. Its dense composition means it has low air permeability and good thermal mass, helping maintain stable indoor temperatures. The term “solid dense” refers to the block’s lack of internal voids and its robust nature, which is preferred for demanding structural work.
As of August 2026, PriceNailer data confirms that the cheapest price for Solid Dense Concrete Block (7.2N) 440 x 215 x 140mm is £2.46 from BuilderDepot across 3 suppliers. Prices have increased by 5.0% over the last 8 months.
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Frequently Asked Questions
What does 7.2N mean for concrete blocks?
The 7.2N rating refers to the compressive strength of 7.2 Newtons per square millimetre. This indicates a medium to high strength concrete block suitable for most structural applications including load-bearing walls and foundations.
How many 440x215x140mm concrete blocks do I need per square metre?
You need approximately 10.5 blocks per square metre when laying these 440x215x140mm blocks. This calculation is based on the block's face area of 440mm x 215mm including standard mortar joints.
Are solid dense concrete blocks suitable for external walls?
Yes, solid dense concrete blocks are excellent for external walls due to their low air permeability and weather resistance. However, they typically require insulation and rendering or cladding to meet modern thermal performance standards.
What's the difference between solid dense and lightweight concrete blocks?
Solid dense blocks are heavier and stronger with better sound insulation, while lightweight blocks offer superior thermal insulation. Dense blocks are preferred for structural work, whereas lightweight blocks are better for partition walls.
Do I need special tools to cut 7.2N concrete blocks?
Yes, due to their density and strength, you'll need a masonry saw, angle grinder with diamond blade, or block splitter. Standard hand tools may struggle with the hardness of 7.2N rated blocks.