Hi guys, hope everyone is well. I'm in the process of planning a shed build to protect the wife small business stock of Apparel. The shed size will be 6x12. The site we propose to use is an area of wooden decking that is approx 4 years old. It currently holds the plastic style Keter shed and Keter boxes. I will double-check the structure underneath prior to starting but cannot see it being a problem. As the shed will be built on a wooden base Im assuming the secondary shed floor and skids won't require any damp proof membrane? As the decking is already raised I'm debating on what size timber to use for the skids, as the decking is already raised approx 6-12 inches. Should I space the skids every 12 or 16 inches? For the floor, it seems common for 18mm OSB or ply to be used. Which would be better? In regards to the framing, I'm unsure if 3x2 if is overkill, as my other shed uses 2x2? I've seen many youtube videos using ply on the outer skin then vapour barrier with featheredge/shiplap on top? Is there any real benefit to covering in ply and shiplap? Next, I need to decide if I need insulation. It may be a good idea but unsure if the budget permits both a covering of ply and internal insulation. Which would be better? I appreciate I have many questions but each video seems to give varying advice with none using an existing decking platform as the 'slab'. I would really appreciate the help of the community in getting my shopping list together. Many thanks Paul.