"Chris J Dixon" wrote

I want to make a simple rectangular planter (1), and don't want
it finished in any of the available garish preservative colours.

I thought I might use Wikes treated sawn gravel boards, with
fence posts for the corner pillars. I'm happy to go with a rough
sawn appearance.

I see that planters on sale seem to come with a plastic sheet
liner, though some of them are made of surprisingly thin timber.

Should I add a clear preservative, do I need a liner, or is it
probably better (and cheaper) to simply use substantial timber,
and replace when it decays?

(1) 600 mm x 800 mm, to match the concrete surround on a manhole
cover.


You can get galvanised manhole covers made to take paving bricks so a few
inches deep with key holes so they can be lifted should the need arise. No
reason you could not fill with soil and plant in those, for example....
http://www.wickes.co.uk/Clark-Drain-...600mm/p/240732
--
Regards. Bob Hobden.
Posted to this Newsgroup from the W of London, UK