I have the clearance required behind my Jotul F3, 14" to combustibles. My question is...I have a double wall pipe connecting the stove to the chimney liner, I have a ring/wall plate to go around the pipe to hide the hole I'm cutting in the wall finishing, the wall finishing is Micore 300, is it safe for this Micore 300 to be so close to the double wall pipe (about 1")? The city inspector said it was fine but for some reason I am paranoid about it. Does anyone know if this is safe? Thanks!