NBS Source
Airtec Party Wall Block


Suitable for acoustic party/ separating, flanking or fire resistant walls and for use in Robust Detail party wall construction between dwellings and when in accordance with Building Regulations (E&W) Approved Document E.


3.6 N block designed to offer superior thermal performance.

Features and benefits:

  • Complies with the latest European Standard BS EN 771-4, which exceeds the performance criteria of BS 6073-1.
  • Autoclaved Aerated Concrete (AAC) wall blocks are manufactured to the traditional coursing height of 215 mm and to a length of 620 mm, with a range of thicknesses available from 75–215 mm all with a dimensional accuracy suitable for both general purpose and thin-joint mortar construction.
  • Accessories include AIRTEC Brickettes: Autoclaved Aerated Concrete (AAC) coursing units designed to offer brick-sized (65 x 215 mm) products for use as infill around doors and windows. It's benefits include the following: Eliminates the need for cutting down full-size blocks, maintains material continuity throughout the entire wall thus avoiding the effects of cold-bridging and differential movement which can arise from the use of dissimilar materials, maintains uniform thermal performance throughout the entire wall, reduces the need for cavity closers and reduces pattern staining.
  • AIRTEC Brickettes can be applied on internal and external leaf of cavity walls, loadbearing and non-loadbearing walls, partition walls, thin joint construction and fire resistant walls.
  • Freeze/ thaw resistant.

General information







Uniclass 2015

Pr_20_93_52_05 Autoclaved aerated concrete (AAC) blocksPrimary


F10/360 Autoclaved aerated concrete (AAC) common blockwork

F10/37 Autoclaved aerated concrete (AAC) common blockwork

F10/370 Thin-joint autoclaved aerated concrete (AAC) common blockwork

F10/39 Thin joint autoclaved aerated concrete (AAC) common blockwork

Specification data - Autoclaved aerated concrete (AAC) blocks Enhanced data


To BS EN 771-4.


Group 1.

Mean compressive strength (minimum)

3.6 N/mm².

Freeze/ thaw resistance

Frost resistant.

Thermal conductivity (maximum)

0.13 W/mK.

Tolerance category



600 kg/m³.

Reaction to fire

Class A1 to BS EN 13501-1.



AIRTEC Brickettes (Coursing unit) Party Wall.


8.2 kg: Block weight.

67 kg/m²: Walled weight.


Face size

620 x 215 mm.

Environmental information

Embodied carbon

121 eCO2m³


Concrete Blocks Brochure

Concrete Blocks Brochure

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