What’s in a block?

[Ben100]

Hi, I’m considering different building methods and was wondering about the difference in concrete block costs.

 

Why are some blocks £1 and others £7 per block?

 

Some blocks say they can be used for cavity, below ground and above ground. Is this a good option or should I go for specific blocks for each area?

 

Cheers,

Ben

[Declan52]

Sand cement and aggregate.  The difference in them will be the strength of the block.  You will see a number at the end like 7n/mm2.  The higher the number the stronger it will be so the more expensive it will be to make. 

For lightweight blocks you swap out the aggregate and sand for everything from cinders and ash to shale and  slate and glass. 

You can use standard concrete blocks anywhere in your build, founds, walls interior and exterior. The strength will be dictated by how high your going but 7n blocks will do most jobs. 

[Russell griffiths]

Specific blocks for each area. 

Higher density for higher load areas, block strength is measured in kn. 

lighter blocks for main walls, block n beam floor etc. 

 

 

Both typing the same time. @Declan52 

Edited November 6, 2018 by Russell griffiths

[Ben100]

Cheers guys. I guess the strength and width will be set out by the architect and/or the SE too.