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Hi guys. Need some collective advice re the above. A while ago I converted a garage that's part of an steading type outbuilding into a nice little boxing gym. Sadly I noticed small puddles of water appearing on the floor that I'd painted with Leyland floor paint. It's definitely not coming from above so was thinking it must be wicking up though concrete and settling on surface. Now I've only recently found the time to tackle this and I've started by ripping out the floor and I want to start again. I've taken up the old concrete that ranges from a few mils to a few inches thick. Under this is a variety of different sized stones set into sand, some quite large. I'm guessing this is a fairly standard way of doing a floor in an old outbuilding. I was expecting more water but there's been just a few wet stones and general dampness, no water pipes ect. Appreciate this is a bit long winded just wanted to set the scene. The questions I have are. What to do next that's the easiest most cost effective way to put in new floor. I've got a damp proof membrane I'll obviously put down. Will I need to whacker plate some sand down first before membrane, if so how deep? Will i need to use rebar? I've paced out floor and it's around 3m wide by 5m long so not big. Is this something I can do myself with the hiring of mixer and whacker ect? I've done the easy bit, though back breaking now need a plan for the next part. Some pics included including a couple when it was just finished and in use. I'll be adding some more ventilation also. Many thanks 👍🏻 https://photos.app.goo.gl/dvHAr89rhkHy6WPP6 https://photos.app.goo.gl/hV5Yb9kpUnKeRcJH6 https://photos.app.goo.gl/nrDWuZ7c3w5xotbv9 https://photos.app.goo.gl/oFrh8cF9PBR6CC4K8 https://photos.app.goo.gl/PHdmzhGCNY2wZDzm9