AGibbo

Hey everyone, Im hoping someone else has done this before and can tell me whether its a good idea and will work: I'm doing up a 30ft Springer and will be insulating with closed cell spray foam, is it then possible to lay a wet floor heating/ cooling system through the central aisle of the boat (where the hull is deepest), and circulate cold water(from my normal water pump?) and hot water (heated by a back boiler in winter). If so will I need a separate pump for hot water? Everything will be running off 12v solar, and my engine is air cooled so no hot water created by that. Ive been told I can clean the engine to the extent that I could heat the boat from the fumes, but I would rather not have to run the engine and doubt that it could be clean enough that I wouldn't feel like I was breathing in exhaust. At the moment I'm gutting the boat and will need to sort these systems out before I can spray foam- is it worth also laying damp proof sheeting under the insulation? On a separate note, anyone got any tips for building roof storage? How do you handle the curved roof?? Build a curve in to the unit or prop afterwards? It will be holding my solar panel on top so I want it to be pretty secure. Thanks in advance!