I would like to know how high above the roof it needs to be.
(1) It will be for a oil/wood/coal stove that heats the hole I am replacing the old cement block one.
(2) I am going to put a footer under it, 3feet deep and it will come up about 4 feet high . Made of poured cememt, whit the clean out in it.
I want to go up from there with cement blook and tile. I want to put feild stone form our farm around it.