Thanx for the info. Tin roof no insulation, want to use single wall stove pipe , will look at stove store ideas , may create home made thimbles for upper floor and waterproof same for roof . Mostly worried about water ingress around roof opening and how to prevent it. Temp. at floor and roof should be < 200' F. Lower room <7' ceiling ,upper 6.5. Stove ,coffee, compressor and sandblaste ,ladder to loft.
You probably know, but single wall is fine INSIDE, but outside, you need to use double or triple wall pipe. Single wall OUTSIDE will lead to excessive creosote formation, and much higher chance of a chimney fire.
A “kit” to get you through the roof should be about $250-$400. A couple of 2-3’ sections of stainless double-wall pipe for outside will be about $100 each, and then $30-$50 for a cap. Your inside single wall pipe will be pretty cheap.
