hey all my chiminey foir the furnace and water heater needs some attention in the spring. the very top surface where the flue is, is flat w/ a stucco/mortor type finish on it. well the house was built in '63-'64 and the mortor/cement is looking like sand stone and wearing away.
my question is; what should be used to repair it? what type of mix?
do i have to remove all the old mortor or can i go over the top of the existing stuff?
i know that it should have pitch to it for water to runoff but how do you trowel it for finish, are there suppose to be high *points* where the angles are from the four corners or can it just be a gradual taper all the way around.
thanks for any support and tips...
mike...............