Superior Sound Insulation and Acoustic Performance

Test data has proved that a wall constructed from Celcon aircrete blocks can match the acoustic performance of brick and aggregate block masonry walls. This is demonstrated in the graph which shows a superior mass law curve for aircrete compared with the NPL mass law relationship which applies to all other forms of masonry. The graph shows the sound reduction index R for a known superficial density of the two types of masonry.

AZoBuild - Building Technology - The graph shows a superior mass law curve for aircrete compared with the NPL mass law relationship which applies to all other forms of masonry.

It clearly demonstrates how an aircrete separating party wall although lightweight, can equal the heavy constructions of similar thickness.

Sound Insulation Relationship

Experience has shown that there is a relationship between the various factors which contribute to good sound insulation:

Careful design + Separating-wall construction + Associated structure + Proper site practice
= Good sound insulation

and a deficiency in just one part can adversely affect the overall performance. The most common fault is poor workmanship, e.g. poorly filled joints.

Principles when Developing Design Details

The Celcon Technical Services Department is pleased to discuss any sound insulation queries.

It is recommended that the designer always follows these principles when developing design details:

1.      Wherever possible, rooms either side of a separating wall should have similar uses.

2.      Ideally services should not pass through, or be chased into, separating walls.

3.      Mechanical equipment (such as cooker hoods, boilers and pumps) should never be mounted on a separating wall, unless fixed on acoustic mountings.

4.      In the design of the structure, sound transmission can be reduced if:

a)     The floor slab supporting the separating party wall is not continuous,

b)     Joists are not built into the separating wall (if this is unavoidable they should be fully sealed),

c)     Wall ties in cavity separating walls are omitted if they are not required structurally.

5.      Movement joints should not be built into separating party walls.

6.      Steps and staggers between dwellings will improve sound insulation.

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). Superior Sound Insulation and Acoustic Performance. AZoBuild. Retrieved on February 26, 2024 from

  • MLA

    H + H Celcon. "Superior Sound Insulation and Acoustic Performance". AZoBuild. 26 February 2024. <>.

  • Chicago

    H + H Celcon. "Superior Sound Insulation and Acoustic Performance". AZoBuild. (accessed February 26, 2024).

  • Harvard

    H + H Celcon. 2019. Superior Sound Insulation and Acoustic Performance. AZoBuild, viewed 26 February 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

Azthena logo with the word Azthena

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.