"Ian Stirling" wrote in message
...
Can anyone give me an idea of what sort of price I would pay for
100* 1.2*2.4*100mm sheets of polystyrene?

Or, what is the typical discount over 1.
Where would I be looking, builders merchants, or are there specialist
suppliers that do insulation?

Builders merchants will give you a price but flick through yellow pages and
look for packaging suppliers who do poly boxes etc. My B-i-L does everything
in poly and can probably do sheets at a decent price, I'll ask if you want?