should I still put landscape fabric on top of the ply sheet? There will be an edge put around the top to create a frame if that makes sense so the rusty nails will be hidden. When I saw the rusty nails I felt concerned but from everyone's replies it sounds like it is fine to leave them as they are.
Thanks chippie244. I am actually going to ask Carpenter2 to remove the legs as I don't think they will be suitable considering the weight. I am going to ask him to put them on pedestals instead. Each pedestal can support, apparently, 1 ton in weight. http://www.buzonuk.com/productRange.php
Thanks Astramax for your advice. Shame it is too late to change the other things. Is the ply going to be okay with the water? I will make the holes bigger then to 50mm. Would you suggest that they are secured to the wall that it is next to or just leave freestanding?
Hi Chippie244. They are actually kitchen legs - the ones used under kitchen cabinets rather than scaffolding tubes. Anyhow I am going to ask them to be removed as I don't think they will be strong enough. They will be replaced with pedestals.
Does that sound okay?[/QUOTE] That sounds ok ish, if the plastic really stays stuck to the perimeter of the holes which I doubt it will. Once that plywood gets wet it will be the week point in it as far as rot is concerned (over time)so if you had the time to paint it on the inside with something very water repellant like bitumastic paint sealing the interface between 2x2 and plywood on the base at the same time, that would be good.
Thanks Mr. Moose. So paint the plywood top and bottom with bitumastic paint. Is there one that you would recommend I use? I presume the wood used for the carcass is fine and does not need painting.
Buzons will make fitting easy but just chopping some 100 x 100 to length will be a whole lot cheaper.
The planters are on a outdoor 'roof' terrace so I am worried that the wooden legs could penetrate through the asphalt membrane from the weight. The pedestals I believe would be better at distributing the weight of the planters - I think but I could be wrong.
A couple of good coats of a clear wood preserver may be more beneficial than a Bitumen paint for longevity.
Thanks Astramax, I was Googled Bitumen paint and not coming up ones that are suitable for wood more roofing or metal. I came across the Ronseal Total Wood Preserver and it says it provide waterproofing for wood. Do you know if Ronseal is a decent brand to use?