"Pet @ www.gymratz.co.uk" wrote in message
.uk...
The Natural Philosopher wrote:

If its too wet it slumps.

It can almost be as dry as you like frankly. It will in time set no
matter how little water there is in it.

that makes things easier then, I presume the moisture from the sand will
be more than adequate for "setting" purposes then.

Though they do suggest leaving the heating on for 2 weeks before laying
chipboard on top for it to set.



I would leave at least 1 week per 10mm of thickness, especially if putting
h/w flooring or tiles on top.
In fact damp it down with hose after first 48 Hrs, and cover with plastic to
stop it drying out - you want it to cure - not dry.

I treated all of mine with a Butyl sealer after 1 week - stops dusting.

Rick