Standard Blocks - Lightweight Aircrete Blocks for External Wall Construction

Celcon Standard blocks have been value engineered to combine strength, high thermal performance, good acoustic and fire properties, whilst retaining the lightweight characteristics of aircrete.

Manufactured to a compressive strength of 3.5N/mm², Celcon Standard can be used to meet the structural performance criteria of most houses up to three stories. Their inherent thermal properties provide a significant contribution to the overall energy conservation of a building and can reduce the amount of additional insulation required compared to other types of lightweight or dense aggregate blockwork with a similar strength.

Celcon Standard blocks being light and easy to handle, provide many benefits for the site operative. CONIAC sheet 37 advises that “With block handling the risk of injury is largely determined by the weight of the block”. All blocks up to 265mm thick meet the CONIAC manual handling requirements for health and safety.

Identified by its distinctive V-key which runs across the full face of the block as well as by a bar code label on the outer packaging.

Technical Data

Standard Blocks

Average density (kg/m3)


Compressive strength (N/mm2)

3.5 (3.6*)

Thermal conductivity (W/mK)


Vapour resistivity

60MN s/gm

Co-efficient of linear expansion


Specific heat capacity

1.05kJ/kg K

Vapour diffusion resistance factor


BBA Certificate No.


*When referencing the European Standard BS EN 771-4: 2003 the compressive strength values in brackets should be used.

All Standard block thicknesses can be used below DPC level in most soil conditions.

This information has been sourced, reviewed and adapted from materials provided by H + H Celcon.

For more information on this source, please visit H + H Celcon.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    H + H Celcon. (2019, April 23). Standard Blocks - Lightweight Aircrete Blocks for External Wall Construction. AZoBuild. Retrieved on March 02, 2024 from

  • MLA

    H + H Celcon. "Standard Blocks - Lightweight Aircrete Blocks for External Wall Construction". AZoBuild. 02 March 2024. <>.

  • Chicago

    H + H Celcon. "Standard Blocks - Lightweight Aircrete Blocks for External Wall Construction". AZoBuild. (accessed March 02, 2024).

  • Harvard

    H + H Celcon. 2019. Standard Blocks - Lightweight Aircrete Blocks for External Wall Construction. AZoBuild, viewed 02 March 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type
Azthena logo powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.