I'm reading through the installation manual for the DuraPlus Chimney and it states that a 1/2" gap is needed inorder to ventilate the chase. Would this negate the benefits of insulating the chase walls above the firestop? I'm asking myself why I would do that if I'm going to have a 1/2" air gap all the way arounds the top that will allow cold air to flow into the chase volume above the firestop?
Up untill this point, I was just going to use the DuraPlus Ventilated Flat Roof Flashing, screw it down to the chase top and use silcone caulk to seal it.
Up untill this point, I was just going to use the DuraPlus Ventilated Flat Roof Flashing, screw it down to the chase top and use silcone caulk to seal it.