Martin Sykes wrote:
"ned" wrote in message
...
... 'Not sure what the purpose of the pond liner is.

I don't think it's necessary but I've seen a garden-makover program
where they recommended this to stop the soil being washed through
the
gaps between the sleepers. as it was more than one sleeper high.

Ah, then all that is needed is some of that porous membrane used for
suppressing weeds. 'Must be cheaper than pond liner.

--
ned