The exit kit required is dependent of the roof material. For shingled roofs you would use the shingled roof exit kit CB-6001-SR. For almost all other roofs you should go with the metal roof exit kit CB-6000-MR. The boots offered in the kits are good for roofs up to 45 degrees. Roofs that are steeper than 45 degrees will need to acquire the same boot but in a larger diameter to be able to accommodate the steeper pitch.