Re: Vermiculite:Cement ratio
The finer grade is a bit easier to work, but requires more water which needs to be removed after it's set. I use a medium grade and have found a 50/50 mix of perlite and vermiculite makes a more workable mix than either alone, can't explain why. Also a little clay added helps make a more workable mix. I use about half a handful per litre of cement.
The finer grade is a bit easier to work, but requires more water which needs to be removed after it's set. I use a medium grade and have found a 50/50 mix of perlite and vermiculite makes a more workable mix than either alone, can't explain why. Also a little clay added helps make a more workable mix. I use about half a handful per litre of cement.
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