I am planning on building a 3.5 by 4m garden shed/workshop, and I am thinking that I'll construct it on pressure treated wood post foundations.
I have some 100x100mm pressure treated pine posts. My plan is to paint on some end grain protection, and dig them into a hole lined and backfilled with crushed stone. My thinking being that the crushed stone will prevent moisture from pooling next to the wood. What are people's thoughts on that? Is the gravel idea even necessary with pressure treated wood? Would I be better with concrete in the hole? Is there anything else I might not have thought of? (Well, the answer to that is yes!)
Some background: I'm on the east coast of Scotland so it's not the driest, I've never seen water pooling in my intended location but my reason for building is that an existing shed has rotted away to nothing. It had been built on untreated timber placed straight on the ground, so far as I can tell.