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...............