The first is called step flashing.
Flashing a fieldstone chimney along siding.
A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing.
Proper flashing around a chimney includes two layers.
Yes you can caulk but in reality you should also be using chimney flashing which gets attached to and sealed to the chimney and then gets bent over the j channel.
Next comes the counterflashing.
Along the bend at both ends so that the flashing bends around the chimney at the bottom and overlaps at the ridge.
On each end of the pan flashing cut about 1 1 2 in.
The other measures should have been taken before the siding was installed.
Pieces of 18 inch wide flashing installed prior to the brick work but on top of the house wrap in a stepped fashion periodically laying on top of the lapped upper portion of the siding to get the water back to the exterior of the wall is more along the lines that i would be thinking of.
The house will receive a cement style siding panel with no inside corner trim against the brick.
The project is ocean front and it has become a point of discussion as to how to prevent water from penetrating when we get the sideways rain that we do.
Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney.
I ve looked around a bit and all the details i can find only deal with chimney roof flashing.