Aerated Concrete Block 7.2N 440 x 215 x 100mm
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Product Details
Available in dense (7.3N), medium-density (7.2N), and aerated (3.6N/7.2N) variants, these 100mm blocks serve different structural needs. Dense blocks form sturdy foundations, while aerated "thermalite" blocks provide insulation in internal partitions. Often called breeze blocks regardless of density, their numbering indicates compressive strength in Newtons per mm²
As of August 2026, PriceNailer data confirms that the cheapest price for Aerated Concrete Block 7.2N 440 x 215 x 100mm is £2.70 from Wickes across 7 suppliers. Prices have decreased by 6.6% over the last 19 months.
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Frequently Asked Questions
What does the 7.2N rating mean for aerated concrete blocks?
The 7.2N rating indicates the compressive strength of 7.2 Newtons per square millimetre. This medium-density rating makes these blocks suitable for load-bearing internal walls and partitions while still providing good thermal insulation properties.
How many 440 x 215 x 100mm aerated concrete blocks do I need per square metre?
You need approximately 10.6 blocks per square metre for this size. The exact calculation is based on the block face area of 440mm x 215mm, accounting for standard 10mm mortar joints.
Can I use 100mm aerated concrete blocks for external walls?
These 100mm blocks are primarily designed for internal partitions and non-load bearing walls. For external walls, you typically need thicker blocks (140mm or more) to meet building regulations for thermal performance and structural requirements.
What's the difference between aerated concrete blocks and dense concrete blocks?
Aerated concrete blocks contain air bubbles making them lighter with better insulation properties but lower strength. Dense blocks are heavier with higher compressive strength, making them ideal for foundations and load-bearing applications.
Do I need special tools to cut aerated concrete blocks?
Aerated concrete blocks are relatively soft and can be cut easily with a hand saw, band saw, or masonry saw. Their lightweight nature and cellular structure make them much easier to work with than dense concrete blocks.