Jangchub wrote:

Tell that to MOST of the homes in the northeast. Most are built on a
cinder block foundation. I think you have your ingredients wrong, but
to appease, it would be fine to use cement blocks and leave a few
inches every two feet open for ventilation

Cinder blocks are made with coal cinders to make them lighter.

Concrete blocks are made with concrete to make them stronger.

Many people mistakenly call concrete blocks, cinder blocks, just as many
people mistakenly talk about steam shovels which haven't used steam for
over a hundred years.

If you go to a dealer and ask for a cinder block, they may give you one,
so don't ask for them. Ask for concrete blocks.

See: http://en.wikipedia.org/wiki/Cinder_block

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