I have used EkoDeck before on smaller screening projects so this one was interesting to do and pushed the limits a bit. To give neat corners I used aluminium angle, some of which I had to paint myself as I couldn't find larger sizes in a black finish. For the edging along the top I found that HardieDeck trim worked but I did need to plane the boards a little as it is designed for 18mm boards and the larger EkoDeck is 23mm.
To get the best lifespan from a project like this, you really need to use a landscape-grade timber for the internals especially. Ideally use H4 treated pine. I tend to use sleepers for these projects as they are cost effective, easy to work with and have a long lifespan. Normally 200 x 50mm x 2.4m does the job.
Any screws need to be suitable for landscape use too. You can use galvanised but personally I prefer ClimaCote as I've found that they are a lot easier to screw in and apparently they have a longer lifespan in treated Pine.
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