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What is

Autoclaved Aerated COncrete?

AAC block (Autoclaved Aerated Concrete) is a high quality, lightweight, self insulating, sustainable, fire resistant, "green" product. It is manufactured in various sized blocks as well as panels. The most common size for residential application is 8" x 12" x 24".


AAC has been successfully used throughout Europe since the early 1900's and has now become a predominate wall building material in both Germany as well as the United Kingdom, due to its economic as well as environmental benefits.


The cellular structure of AAC results in material that is approximately one-fifth the weight of conventional, dense concrete. This lower density allows for reduced building time, and lighter load bearing structures.


AAC provides excellent thermal insulation. Its unique combination of low thermal conductivity and high thermal resistance provides insulation properties than can be up to ten times that of conventional dense concrete or brick. In most cases, AAC will provide superior insulation properties than that of a 6" stud wall with R-16 insulation. As a result, buildings made from AAC will be cooler in the summer months, and warmer in the winter. This drastically reduces the building energy consumption as well as costs.