Fire Resistance

Excellent fire and heat resistance

Autoclaved aerated concrete provides the highest security against fire and meets the most stringent fire safety requirements. Due to its purely mineral composition, AAC is classified as a non-combustible building material. It is both resistant to fire up to 1200°C and, unlike other construction materials, heat-resistant.

AAC can thus be used as a fire wall to prevent fire from spreading, thereby protecting lives and economic assets. In principle a fire wall should last up to four hours but tests have shown that an AAC fire wall just 150 mm thick can resist at least for six hours. In a real blaze, an AAC fire wall even survived intact for 120 hours.

Small wonder, then, that AAC is used in fire safety tests as a building material for kilns to measure the fire resistance properties of other construction products. Or that some insurance companies offer reductions in fire premiums for buildings equipped with AAC fire walls.

In addition to internal fire walls, constructing outer walls of AAC contributes significantly to fire safety since most blazes start outside buildings.

Besides being fire- and heat-resistant, AAC does not give off any smoke or toxic gases, which can endanger human life more than fire itself.

AAC manufacturers make it their business to collaborate closely with researchers, architects, fire departments and insurance companies in order to maximise AAC's contribution to fire safety.


aac-firewall tyre-depot

6ICAAC 2018 in Potsdam

From the 4th to the 6th of September 2018 in Potsdam, Germany will be held the 6th International Conference on Autoclaved Aerated Concrete

Read more ...

New category Recommendations

Prepared by our Technical Committee you will find under this new category recommendations for design of reinforced AAC.

Read more ...

Earthquake statement

Lightweight-Construction materials improve earthquake Resistance in Buildings: In 2016, a series of devastating earthquakes in Italy led to the harrowing loss of life. This tragedy was partially the result of the buildings and infrastructure being severely damaged in the process.

Read more ...

Sustainable Energy Week 2017

... took place between 19 and 25 June 2017. See more at

Organised by local public and private organisations, Energy Days are activities and events that raise awareness of energy efficiency and renewables.

Read more ...

EU Sustainable Energy Week High Level Policy Conference

The EU needs better policy to unlock zero energy buildings’ potential | Joint Press Release

The Autoclaved Aerated Concrete Industry and Builders’ merchants call for clear definitions of energy efficient buildings and financial support for sustainable logistics.

Read more ...

EU Sustainable Energy Week 2014 - Save the date

The Sustainable Energy Week 2014 will take place between 23 and 27 June 2014. See more at

EAACA is pleased to invite you to a High Level Policy Conference as part of the EU Sustainable Energy Week 2014.

Read more ...
Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.