I'm building a new detached garage. It'll just be a garage/workshop for now. If at a future date I wanted to make it into a home office is there anything I should be doing now? Insulating the floor, maybe? Anything to help prevent damp (this would be handy for the workshop, too)? Any pointers to some nice pics of the how the foundations, DPM and garage floor and anything else should sit would be nice.