What Is CLC?

CLC is called as Cellular Light Weight Concrete and it is also called as Foam Concrete. It is a version of light weight concrete that is produced like normal concrete under ambient conditions. CLC Blocks are a cement-bonded material made by blending slurry of cement. Stable, preformed foam manufactured on site is injected into this slurry to form foam concrete. 

Why Use CLC?

CLC block has the same composition as a solid block with an addition of Foam in it, So this block is almost 40% lighter than the Standard Solid Concrete Blocks and Clay bricks. The large size and smooth finish of the blocks also reduce the quantity of both the packing mortar and plastering mortar


There are many advantages of using CLC Blocks including:

Light in Weight 

CLC blocks are very lightweight with density ranging from 300 to 1800 Kg/m3. Three times less weight then clay bricks.

Eco friendly

CLC blocks are Environment-friendly. Foam concrete is eco- friendly material as fly ash and other industrial waste material are used in part of manufacturing blocks to protect the environment.

Thermal Insulation

CLC Blocks are excellent for thermal insulation which keeps the house cool
in Summer and warm in Winter saving energy/electricity for cooling and

Lower Water Absorption

The water absorption of this material in relatively lower than any other
materials. The low water absorption property of these blocks will help to reduce the cracks in the walls.

Fire Protection

CLC blocks offers great fire protection. With a just 100mm thickness of wall with density of 1000 kg/m3, offers fire endurance for heat transmission for 4 hours without releasing any toxic fumes during the fire.

Easy to Handle

CLC blocks are easy and quick to install, thus minimizing construction costs. They require no minimal maintenance, which reduces long- term costs. Foam concrete blocks are saving in cement, sand,
water, labour, energy & time.


Comparison of CLC blocks v/s AAC blocks v/s Red clay bricks in House Construction

CLC Blocks

  • Raw: Cement, fly ash, water and foam, no primary energy input
  • Dry Density: 600/800 kg/m³
  • Aging: Gains strength with age                                                   
  • Compressive strength is more than other bricks
  • Water absorption capacity: Absorbs very less amount of water. Prevents cracking.
  • Thermal Insulation: High
  • Eco friendliness: Pollution free, Consumes fly ash (a hazardous industrial waste material) and saves environment
AAC Blocks

  • Raw: Cement, lime, specially grinded sand, high primary energy input
  • Dry Density: 400/ 700 kg/m³
  • Aging: Loses strength with age, if not protected against humidity
  • Compressive strength is moderate                              
  • Water absorption capacity: Absorbs more water than CLC. Poor cracking prevention.
  • Thermal Insulation: Moderate
  • Eco friendliness: Pollution free, requires specially grinded sand so high energy consumption
Clay Bricks

  • Raw: Top agricultural soil, primary energy input
  • Dry Density: 1900 kg/m³
  • Aging: Doesn't gain strength with age                         
  • Compressive strength is less                                   
  • Water absorption capacity: Absorbs more water than CLC. Poor cracking prevention.
  • Thermal Insulation: Very Low
  • Eco friendliness: Creates smoke, wastes agricultural land, soil erosion, banned in many countries