Raised Bed Wood Protection Question

[fiskies]

I'm currently in the process of building raised beds in the garden which I hope will eventually be about 50cm in height with no bottom straight onto dug over soil. I'm planing on painting the outside with wood preserve green paint much like my shed but I would like to line the inside with some plastic to prolong the life of the wood from the wet soil.

Any suggestions on the best stuff to use or where I might pick it up or what it's called???

[oldie]

The dimensions of the bed(s) may be a deciding factor. Some of us have simply used old compost bags stapled to the sides, but 50cm is quite high and you could need a lot of bags. Silage sheet as used by farmers might be better if your beds are large. I scrounged some from a local farmer.

[Potstubsdustbins]

Builders merchants stock a thick plastic membrane in large sizes it is used as a damp proof coarse under concrete.

Colin

[Aberdeenplotter]

Got it in one Colin

[snohare]

DPM (damp proof membrane) is what I use, it seems to have enough plasticiser/UV stabiliser in it that it does not become friable and break down as rapidly as most plastic sheeting (especially fertiliser sacks) under prolonged exposure to cold, sun, etc.

[fiskies]

Thanks for the reply guys, dpm it is then, cheers.