Thermalite Aircrete Hi-Strength Coursing Block

Thermalite Hi-Strength Coursing Blocks are autoclaved aerated blocks for use in bonding and infill to ensure that a uniform thermal performance is achieved throughout the wall. Hi-Strength Coursing Blocks are also available for use in walls built of Hi-Strength 7 or 10 blocks. The Thermalite Hi-Strength Coursing Blocks retain the standard 440mm block length so reduce the number of mortar joints required when detailing, saving time and money.


  • Protects against pattern staining
  • Ensures uniform thermal performance
  • 80 per cent recycled content
  • Moisture resistance
  • BES 6001 Responsible Sourcing certification

Key Data

Compressive Strength: 7.3 N/mm²

λ Design: 0.18 W/m.K

Working Dimensions

Face dimensions (mm): 440 x 65

Dimensions and Weights

Height Length Width Dry Weight
65mm 440mm 100mm 2.2kg
65mm 440mm 140mm 3kg

Cavity Walls
Separating Walls

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Thermalite Guide

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