
FLY ASH BRICKS VS CLAY BRICKS – WHICH IS BEST FOR HOUSE CONSTRUCTION
As we decide to build a new home, there are many question and queries comes in mind. House construction is not a temporary structure. we want to build a house that can last long for a too long period. for that we choose to use the best practices, materials, and methods of construction.
To satisfy this requirement we look for,
Which is the best cement for the house?
Which is the best grade of concrete?
Which is the best flooring material?
Which is the best brick for house construction?
There are too many things we are looking for. so in this article, we will try to give you an answer to the question that is which is the best brick for house construction.
As we know there are two popular bricks available in the market one is fly ash bricks and other is red clay bricks. We will do some comparative study on fly ash vs clay bricks to decide which is best for house construction.

- Materials
Fly Ash Bricks | Red Clay Bricks |
These Bricks are made from cement, slag, fly ash. | Red Bricks are manufactured form Clay Soil |
- Size
Fly Ash Bricks | Red Clay Bricks |
Fly ash brick has more uniform shape as they are cast in machine mould | Red bricks do not have uniform shape as they are hand mould made |
- Color
Fly Ash Bricks | Red Clay Bricks |
Fly ash brick has Cement grey color | Red brick has color red to light brown |
- Compressive strength
Fly Ash Bricks | Red Clay Bricks |
Fly Ash Bricks has compressive strength – 75 to 100 kg/cm² | Red Brick has compressive strength – 30 to 35 kg/cm² |
- Wastage during transit
Fly Ash Bricks | Red Clay Bricks |
Fly Ash Bricks wastage on site is around | Red Brick wastage on site is more than |
- Water Absorption
Fly Ash Bricks | Red Clay Bricks |
Fly Ash Bricks has Water Absorption of about 6 -12 % | Red Brick has Water Absorption of about 20 – 25 % |
- Weight
Fly Ash Bricks | Red Clay Bricks |
Fly Ash Bricks Weight is 2.6 kg | Red Brick Weight is 3.5 kg |
- Cost
Fly Ash Bricks | Red Clay Bricks |
Fly Ash Bricks Cost is about Rs. 4 to 6 | Red Brick Cost is about Rs. 5 to 8 |
From the comparison, anyone can clearly predict that Fly Ash Bricks has more advantages than clay bricks for new house construction.
Advantages of Fly Ash Bricks over Clay Bricks
- Fly ash bricks are less costly and lighter in weight.
- Fly Ash bricks consume only 65 kg cement for the construction of 1 m³ of brickwork which is less compare to red brick.
- By using fly ash brick we can reduce cement consumption up to 50 % as these brick walls not required plastering on both sides.
- High compressive strength, fewer pours and light-weighted compared to clay bricks.
- In high-rise building when structural load increase, this brick has lightweight helps in reducing stress on building
- Absorb less water compare to red bricks.
- It is cheaper than the red bricks.
- Fly ash bricks are made of waste materials that come from the combustion of coal in thermal power plants.
- Clay bricks are made of clay which is collected from fertile land or the topsoil. This is the prime reason that makes Fly ash bricks more preferable than Clay bricks.
Conclusion

In all aspects fly, ash bricks are better than clay bricks. They are environment-friendly because maximum constituent is ash and fly ash bricks has greater strength as compared to red bricks.
This is our comparison of fly ash vs clay bricks. Do join us in our fly ash vs clay bricks debate in the comment section by giving your opinions and views.
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