Aerated Concrete Block 3.6N 440 x 215 x 100mm
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Product Details
Aerated Concrete Blocks 3.6N 100mm are lightweight building blocks made with trapped air pockets, making them easy to handle while providing excellent thermal insulation (0.15W/mK) and sound resistance. These versatile grey blocks are suitable for both internal and external walls, foundations, partitions, and beam and block flooring applications. With a compressive strength of 3.6N/mm², they offer reliable structural performance while being moisture, frost, and fire-resistant (Class A4). DIY enthusiasts appreciate these blocks for their consistent dimensions (440mm x 215mm x 100mm), manageable weight (approximately 7kg each), and the fact they contain up to 80% recycled content for environmentally conscious building projects.
As of August 2026, PriceNailer data confirms that the cheapest price for Aerated Concrete Block 3.6N 440 x 215 x 100mm is £1.98 from BuilderDepot across 11 suppliers. Prices have decreased by 4.1% over the last 19 months.
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Frequently Asked Questions
How many 3.6N aerated concrete blocks do I need per square metre?
You'll need approximately 10.5 blocks per square metre for 100mm thick walls. Each block covers 0.095m² (440mm x 215mm), so calculate your wall area and divide by 0.095, adding 5-10% for cuts and wastage.
Can I use 3.6N aerated concrete blocks for load-bearing walls?
Yes, with a compressive strength of 3.6N/mm², these blocks are suitable for low-rise load-bearing applications including single and two-storey construction. Always consult structural calculations and building regulations for specific projects.
What tools do I need to cut aerated concrete blocks?
Aerated concrete blocks are easily cut with a handsaw, bow saw, or masonry saw due to their lightweight nature. For precise cuts, use a fine-toothed saw, and always wear appropriate PPE including dust masks.
Are 100mm aerated concrete blocks suitable for external walls?
While these blocks can be used externally, 100mm thickness alone won't meet current building regulations for thermal performance. They're typically used as the inner leaf of cavity walls with additional insulation.
What mortar should I use with 3.6N aerated concrete blocks?
Use a lightweight mortar or thin-bed adhesive specifically designed for aerated concrete. Standard cement mortar can be used but lightweight alternatives provide better thermal continuity and are easier to work with.