thanks in advance for your thoughts.
I recently purchased a 1920s house that suffered water damage to a third floor (attic conversion) bedroom. The slate roof has been repaired--the chimney is on the damaged wall and the flashing was replaced--and I now want to get started on repairing the wall/ceiling water damage, particularly so I can know for certain if the roof repair was successful.
I have a Klein Pinless Moisture Meter that shows the wall is still wet--I put it on the drywall setting even though the walls are plaster (to my knowledge) since that's the closest match. Since it's been a week since the last rain/roof repair, I decided to cut out an area to see what's going on. (Note: The exterior walls that I have drilled into thus in other places far have been plaster on brick. I haven't had a chance to see how the interior walls look but I believe it's the usual old style lathe/plaster).
Before I go any further, I figured it's best to post on here to get some expert opinions. Note that the left side of the wall is an exterior wall and the right side that I've cut into has the chimney on the other side so it should also be plaster on brick. Any thoughts on the situation and next steps? Keep cutting or call in a pro? Is mold a valid concern?