"R" wrote in message ...
I want to create some raised beds using some pieces of timber

Ross,

I suggest doing what I've done, use gravel board which comes pretreated and
is reasonably priced. I've used 3 by 3 treated fence posts - cut to
appropriate length - at the corners using coach screws to secure the gravel
board. I filled the beds with the soil surrounding them and put14mm
chippings around the beds. The largest of my 5 beds (asparagus) is only 8
feet square and the smallest containing rhubarb is 4ft by 3ft.

regards

Geoff