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AIRTEC Large Format Block

Autoclaved Aerated Concrete (AAC) large format blocks available as flooring and wall blocks.

Flooring block:

  • For use in block and beam floors to provide significantly improved thermal insulation of ground floors and quick, easy installation.
  • Can be laid in either the 620 or 430 mm width, offering a choice of reinforced inverted T-beam centre spacing of 705 and 515 mm respectively.
  • Provides an excellent substrate for application of screed and floating floor finishes. Can be easily cut, bored and shaped where required for simple installation around services and are suitable for use with under-floor heating systems.

- Applications:

  • Infill for block and beam flooring.
  • Fire resistant applications.

Wall block:

Designed to provide significantly improved thermal insulation and air-tightness of internal and external walls by reducing the proportion of mortar joints in a wall. If using a thin joint construction this is further reduced by around 87% when compared to conventional walls using 10 mm mortar joints.

- Applications:

  • External or internal leaf of cavity walls.
  • Loadbearing and non-loadbearing walls.
  • Party/ separating walls to Building Regulations (E&W) Approved Document E.
  • Robust detail party walls, flanking, partition and fire resistant walls.

Freeze/ thaw resistant.

General information

Uniclass 2015

Pr_20_93_51_05 Autoclaved aerated concrete (AAC) infill blocksPrimary


E60/297 Proprietary infill blocks

Specification data - Autoclaved aerated concrete (AAC) infill blocks

Product Reference

AIRTEC Large Format

Standard product features

Face size:

620 x 430 mm.


10 mm.

Compressive strength (minimum):

> 3.6 N/mm².

Transverse strength (minimum):

> 3.5 N/mm².

Thermal conductivity:

0.13 W/mK.

Fire resistance category:

Class A1.

Tolerance category (dimensional classification):