Semi-Exposed Walls - Aircrete Design Guide

Celcon manufactures a wide range of quality aircrete products, available in a variety of grades and dimensions, and all conforming to BS 6073. This is the excellence of Celcon aircrete.

Semi-Exposed Walls (Walls Adjacent to Unheated Spaces)

Walls adjacent to unheated spaces are now treated as exposed walls (but with an allowance for the space), and are therefore required to achieve a U-value of 0.35 W/m²K or less when complying with the Elemental Method or a maximum U-value of 0.70 W/m²K, using either of the whole house methods of compliance.

AZoBuild - Building Technology - Semi-exposed walls (walls adjacent to unheated spaces)

Further guidance has been provided with regard to shelter factors for these 'semi-exposed' situations.

Celcon Applications

  • Internal and external leaf of cavity walls
  • Separating/party walls
  • Multi-storey

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). Semi-Exposed Walls - Aircrete Design Guide. AZoBuild. Retrieved on September 27, 2020 from

  • MLA

    H + H Celcon. "Semi-Exposed Walls - Aircrete Design Guide". AZoBuild. 27 September 2020. <>.

  • Chicago

    H + H Celcon. "Semi-Exposed Walls - Aircrete Design Guide". AZoBuild. (accessed September 27, 2020).

  • Harvard

    H + H Celcon. 2019. Semi-Exposed Walls - Aircrete Design Guide. AZoBuild, viewed 27 September 2020,

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback