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Aircrete blocks are distinguished by their combined structural and thermal capabilities. They are available in different strength grades and sizes and can be used for foundations and walls.

Aircrete is the lightest of the different block types which makes them easy to handle on site and easier and cheaper to transport. They can also be cut with a hand saw, which many other masonry blocks cannot.

The blocks offer useful levels of thermal mass and excellent thermal insulation properties.  It also helps reduce the levels of sound transfer from room to room.

What is Thermal mass?

Thermal mass is the ability of a material to absorb and store heat energy. A lot of heat energy is required to change the temperature of high density materials like concrete, bricks and tiles. They are therefore said to have high thermal mass. Lightweight materials such as timber have low thermal mass.

What is Thermal insulation?

Thermal insulation is the reduction of heat transfer (the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence.

Heat flow is an inevitable consequence of contact between objects of differing temperature. Thermal insulation provides a region of insulation in which thermal conduction is reduced or thermal radiation is reflected rather than absorbed by the lower-temperature body.

Is aircrete cost effective?

Several studies have been done to compare aircrete with other kinds of building materials usually found when building houses.  The study we have provided here has been done twice, once in 2008 and again in 2015. Here are some of the findings:

  Costs per/M2*
RåBuild (the H+H thin-joint building method with aircrete) £830 
H+H aircrete (build using traditional methods) £840 
Timber Frame  £900 
Aggregate masonry     £850 

An independent study was carried out to determine these costs and the savings between the H+H aircrete and other forms of building material.  These studies showed that other forms of building have a significant increase in cost when compared to RåBuild.  For example the increase in cost between RåBuild and Timber Frame is 8.6% and 2.6% when compared to aggregate masonry blocks. When building using SIPS, the increase was as high as 9.7% over RåBuild.  When you have to spend so much to build your own home, savings of this kind can really help.

*View the Factsheet with full data here


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