Hi, I have a small garden that is completely paved and slopes gently away from the house - at one side I have 2 small sheds that each stand on half a dozen paves to raise them off the base. I'm thinking of decking the remainder of the garden and building a concrete base to put the 2 sheds on. I've been advised that it's probably best to deck on top of the existing paving stones, so currently my plan is as follows: 1) Move the sheds and take up the paving stones where I plan to build the shed base 2) Scrape off the sand that "levelled" the paves - underneath it's highly compacted hardcore. 3) Make a timber frame, check level/square etc. 4) Fill with concrete and smooth off with trowel Questions 1) Do I leave the frame in place afterwards, or remove it once the concrete has set? 2) If the concrete is flat, water will collect on it won't it? How high above the concrete should the shed floors be raised? Currently I think it's only 1" thick timber pieces lifting the floor. 3) Should the concrete be smooth, or brushed? 4) The two sheds are similar in depth, so I'm thinking of making a single long narrow base for both of them, rather than two separate bases 4) I understand the decking should slope slightly - which means if at the house end the base is level with the decking, at the other end it will be a couple of inches higher. Any thoughts, tips would be appreciated cheers!