Installing Vent Holes in Old Brick Walls
I bought a house two years earlier. After about 10 months, I noticed some mold growing on some portions of exterior walls. I have removed the drywall/plaster from one of the wall and noticed that the wall is actually build with a layer of bricks outside and a layer of blocks inside with no building wrap. There was a rough plaster on inner side of blocks on which a felt and furring strips were laid to put the drywall on. I noticed various wet spots on plaster. I have sealed all cracks from outside and insulated the wall from inside. Now I am afraid, that if some water again trapped inside the wall, it may not dry and there may be another mold problem.
What I want to do: I want to drill 3/4 inch holes at an angle from outside in the mortor joints, through to the face of blocks (i.e. drill holes in outer layer of bricks) install perforated pipes with some grating material so that bugs may not enter but the water may drain and air may circulate. I want to install these holes every 4 feet. I just want comments that whether this idea work