What was suggested about the return is the right way or you cantilever that wall out about a foot over the brick.
Flashing where siding meets brick.
Uniform building code section 1402 2 exterior openings exposed to the weather shall be flashed in such a manner as to make them weather proof.
I ve read the following sections of ubc that seem to indicate a need for flashing between the brick and hardi siding trim band.
Maybe in this case the flashing extends upwards behind the building siding forming a zee shape that might reduce this risk.
Kickout flashing installs just like standard step flashing except that half of the kickout flashing hangs over the edge of the roof.
The nails holding up the siding should not be caulked.
If the transition exceeds 10 feet in length it s necessary to use more than one piece of.
How to use flashing between brick siding 1.
Install the flashing before you finish the top of the brick wall as the flashing must go behind the siding as well.
Siding nails should not be caulked another item that needs room to play is siding boards themselves.
Install the kickout flashing.
The metal flashing placed on wall top slopes back towards the building directing water inside the structure.
The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.
Thats why most brick houses you see have a hip roof or a full gable end where the brick runs up to the peak.
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.
It might be buried behind the siding where you can t see it.
There should already be a metal flashing that is sealed to the brick.
Run the l shaped flashing up under the bottom row of siding so that it tucks under the final bottom row and on top.
Also avoid caulking tongue and groove siding boards together.
Measure the length of the transition the intersection where the brick meets the face of the wall.