"Chris" wrote in message
m...

I'm considering concrete beam and block to replace a suspended timber
ground floor. Can anyone give an idea of the cost comparison for
concrete and timber. I'm only looking at a room size of about 4m x 5m.
Thanks, Chris.

If you are going to install a beam and block floor, use the system that uses
insulation foam as the blocks. The beams are concrete inverted "T"s. The
slightly curved foam blocks fit between. This gives the a well insulated
floor.