I levelled mine first, and even so, wish I had levelled it more.. >
>I would honestly recommend you get some levelling compound, and trowel
>the while thing as flat as you can..6mm is far too much - 1-2mm over a
>meter is better, and no more than 6mm over the whole floor.
>
>Lay battens over the whole room and mark the high pints and draw >circles
>round the hollows with a felt tip pen. Then mix up the compound after
>PVA/ing the lot, and use battens from the high points to scrape the
>compound level, and float smooth it.
>
>Then when set, do it all over again.
>
>THEN when the floor goes down - which is pretty quick - you will be
>rewarded by a total lack of flexure.
Thanks very much for that advice.
I am now paying a lot more attention to the levelling before laying the boards... which are becoming better and better acclimatised as a result :-)