Wet Walls In An Old House

propertypros1

I'm working on an old house (100+ years) in Philadelphia. The walls under and arouind the windows are plaster on brick; the exterior is stucco on brick. The roof was recently redone. The windows are replacements, probably 5-10 years old; the exterior is capped and recently caulked; a masonry water sealer was recently applied to the stucco.
The problem is that the plaster and compound (applied as a repair) continues to bubble and flake due to moisture. The problem is at two first floor windows---none of the others are affected; no problems on the second and third floors; no evidence of water on walls...
Any insights?

neolitic

Good pictures would save lots of bad
guess work.
There are way to many questions,
and most would be answered with one peek.

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(Sorry....it seems there really are dumb questions)