AAC blocks vs clay bricks

A quick comparison between AAC blocks vs clay bricks

AAC blocks are a relatively new phenomenon in Indian construction industry. Although first AAC blocks plant in India was set up in early 1970s by Siporex at Pune, it is only recently that manufacturing and usage of AAC blocks has reached sizeable number. Inspite of drastic growth in manufacturing of AAC products, fact is that market share of AAC products is very small compared to red clay bricks. There are various reasons for this, but that is a topic for another post. In current post we have provided a comparison between AAC blocks vs clay bricks and we let you be the judge for selecting the best product to suit your needs.

AAC Blocks
Clay Bricks
Soil Consumption
Zero soil consumption. Primary raw material for AAC blocks is fly ash. This fly ash is industrial waste generated by coal-based thermal power plants.
One sq ft of carpet area with clay brick walling will consume 25.5 kg of top soil.
Fuel Consumption
One sq ft of carpet area with AAC blocks will consume 1 kg of coal.
One sq ft of carpet area with clay bricks will consume 8 kg of coal.
CO2 Emission
One sq ft of carpet area will emit 2.2 kg of CO2.
One sq ft of carpet area will emit 17.6 kg of CO2.
Organized sector with proper HR practices.
Unorganized sector with rampant use of child labour.
Production Facility
State-of-the-art factory facility.
Unhealthy working conditions due to toxic gases.
Tax Contribution
Contributes to government taxes in form of Central Excise, VAT and Octroi.
Does not contribute to government exchequer.
600 / 625 mm x 200 / 240 mm x 100-300 mm
225 mm x 100 mm x 65 mm
Variation in Size
1.5 mm (+/-)
5 mm (+/-)
Compressive Strength
3-4 N/m2
2.5-3 N/m2
Dry Density
550-700 kg/m3
1800 kg/ m3
Fire Resistance (8″ wall)
Up to 7 hours.
Around 2 hours
Cost Benefit
Reduction in dead weight leading to savings in steel and concrete.
Energy Saving
Approximately 30% for heating and cooling.
Multi-storied building using AAC blocks vs clay bricks

Multi-storied building using AAC blocks vs clay bricks

We hope this information helps settle AAC blocks vs clay bricks debate. 🙂

P.S: AAC blocks are also called Siporex blocks or Aerocon blocks in various areas.

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  1. Hi Vishal ,
    I would like to know the comparison of overall cost of a good quality clay Brickwork ( including cost of brick, sand, cement and labour) and AAC brickwork for 1m3 , in chennai .
    Thanks in advance.

    • Dear Rajan babu,

      Thank you for your response on my website. I am afraid I do not have all the information required to compute cost of clay brickwork vs AAC brickwork in Chennai. But you may check with local contractor who has used both clay bricks as well AAC blocks to get more realistic numbers.


      Vishal Kansagra
      (+91) 76986 17371

  2. Hai sir
    i heard about that aac brick constructed building or house is economical in overall construction .
    how it is possible?can u explain with pdf or doc.x or reply as early as possible…

    • Sir,
      Thanks for useful information about AAC blocks ……

      May I know the steel consumption if we use for first and second floors …The Dead load of building will reduce.


      • Dear Kiran Kumar

        Thank you for your response on our website. I suggest that you consult your structural engineer for a design optimized for using AAC blocks. He would be better placed to suggest you on exact figures for steel consumption.


        Vishal Kansagra
        (+91) 76986 17371

  3. hi sir thanks for given such a information, i have one doubt which brick you per-for in toilets area

  4. is it true that Siporex blocks do not absorb heat compared to RED bricks, so flats constructed with Siporex feels comparatively hotter thatn RED bricks?

    I am looking to buy property, so want to know if its ok to buy property built with Siporex. Does it make much difference in Summer?

    • Dear Rohit,

      It is true to AAC blocks (aka Siporex blocks) provide better insulation compared to clay bricks.

      Difference in temperatures in summer depends on various parameters like orientation of windows, wind direction, etc.


      Vishal Kansagra
      (+91) 98796 09129