Accoya Wood
Anyone have experience with this? It’s being pitched as the most durable option for exterior trim, 50 year warranty above ground and 25 year warranty in-ground or in fresh water. It’s radiata pine which has been chemically treated with acetic acid (vinegar) which is supposed to stabilize it.
I haven’t been able to find anyone who stocks it locally. I ordered a sample from the manufacturer and the sent me a 3″x3″ piece, big enough for me to say, “Yep, looks like wood,” but not big enough to get any feel for its workability or other qualities. I have used treated radiata before for trim and it is somewhat prone to warping.
Anyone used it?
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I found this comment on a GBA article: https://www.greenbuildingadvisor.com/article/the-rise-and-fall-of-a-miracle-wood#comment-181037
"Hi,
I bought about 5000 square feet of this Perennials wood from Snavely in the spring of 2014 and installed it on a covered deck and an open deck. The open deck is not shaded and it is rotting like crazy. There is about 4' of air space below with good circulation and drying. I paid a premium for what I thought was a premium product. It should last longer than 6 years.
Thanks
Andrea"
It sounds like unfortunately support for it in the USA is minimal.
Based on the comment I would speculate that the details of the processing matter considerably, and acetylated wood from one manufacturer may perform significantly differently than another.
There is quite a lot more detailed info out there on thermally modified wood, which is supposed to fill a similar niche.