YTONG blocks

Ytong Aerated Concrete Blocks

Ytong, part of the Xella Group, manufactures autoclaved aerated concrete building products. The cellular structure gives Ytong blocks a lower density than traditional dense aggregate blocks, making them easier to handle, cut and chase during masonry work.

When correctly specified, Ytong aerated concrete blocks can be used in loadbearing and non-loadbearing wall construction. Their lightweight structure can also contribute to the thermal, acoustic and fire performance of a complete wall system.

Ytong Blocks Available from MGN

The current verified Ytong block range at MGN Builders Merchants includes standard 3.6N blocks and a higher-strength 7.3N option. Each block has a 440mm x 215mm face size, with different widths available for different wall build-ups:

• 100mm Aerated Block 3.6N 440 x 215mm
• 140mm Aerated Block 3.6N 440 x 215mm
• 215mm Hi Strength Aerated 7.3N Block 440 x 215mm

Check the individual product page for the declared weight, thermal conductivity, pallet quantity and other technical information.

Key Characteristics of Ytong Blocks

The aerated structure makes Ytong concrete blocks practical for projects where reduced unit weight and ease of working are important.

• Lightweight cellular construction
• Easy cutting and chasing
• Practical thermal performance
• Class A1 standard block options
• Consistent 440mm x 215mm sizing
• Multiple widths and strengths

The performance of a completed wall does not depend on the block alone. Mortar, insulation, wall ties, finishes, workmanship and the overall wall design can all affect structural, thermal, acoustic and fire performance.

Choosing the Correct Ytong Block

Select a Ytong block according to both its width and compressive strength:

• 3.6N Ytong blocks provide a declared compressive strength of 3.6N/mm²
• 7.3N Ytong blocks provide a higher declared compressive strength of 7.3N/mm²

The block width should match the specified wall construction, while the strength class should meet the structural requirements of the project. A higher-strength block is not automatically the correct choice for every wall, as strength and thermal performance are separate selection criteria.

Before ordering, check:

• Required block width
• Required compressive strength
• Loadbearing requirements
• Complete wall construction
• Required thermal performance
• Manufacturer's technical information

For structural walls, external walls or other specification-led applications, follow the project drawings and confirm the required product with the architect, structural engineer or Building Control where necessary.

Buy Ytong Blocks from MGN Builders Merchants

Browse our Ytong blocks for sale and compare the available widths, strength classes, prices and current stock information. Individual product pages provide the relevant specifications and purchasing options.

Order online from MGN Builders Merchants for delivery across London, Essex and surrounding areas, or select collection from an available branch. For larger orders, confirm the product reference, required quantity and delivery access before purchasing.