Introduction to AAC

It is the smart option.

What is AAC?

AAC stands for Autoclaved Aerated Concrete, an alternate building product that was developed in 1924 by a Swedish architect who was looking for an alternate building product with properties almost similar to that of wood – good thermal insulation, solid structure and easy to work with.

AAC blocks are the new favourite building product of the construction industry which is due to their superior properties; lightweight, energy-efficient, fire-resistant and an excellent thermal insulator.

The AAC blocks are suitable for internal as well as external construction, making them ideal for all kinds of structures such as schools, hospitals, hotels, offices, independent housing and apartments. The buildings constructed with AAC blocks are also known as environmentally friendly buildings and don’t require curing and the normal thick plastering.

AAC Product Range


Wall Panels


Slab Panels

  • Technical Comparison
    Parameter AAC Block Concrete Block Clay Brick
    Size (mm) (624 * 249 * 115 - 365) (230 * 75 * 115) (230 * 75 * 115)
    Variation in dimensions +/-1mm +/-3mm +/-5mm
    Compression Strength 30 - 50 kg/cm2 40 - 50 kg/cm2 25 - 30 kg/cm2
    Dry Density 380 - 800 kg/m3, depending on architectural requirements 1800 kg/m3 1950 Kg/m3
    Fire Resistance 4 - 6 Hours (Depending on thickness) 4 hours 2 hour
    Sound Reduction Index (dB) 60 for 200 mm thick wall 30 for 200 mm thick wall 40 for 230 mm thick wall
    Thermal Conductivity W/(K-m) 0.122 0.51 0.81
  • Economical Comparison
    Activity Conventional Blocks ( Concrete or Clay Brick) AAC Blocks
    Bricks per m2 50 bricks 6.4 AAC building blocks
    Mortar per m2 68 litres of mortar 3 litres AAC thin bed mortar, included in price
    Time per m2 5.6 man hours to build 1 m2 45 minutes to build 1 m2
    Plastering 1,5 to 2,5 cm of plaster on either side 6 mm AAC plaster on either side
    Properties Non-homogeneous wall structure Homogenous wall structure, same material with no shifting and no cracks
    Cost per m2 R485 to completely build 1 m2 R370 to completely build 1 m2
AAC Tool Kit
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