Why do Building Envelope Commissioning?

A few weeks ago the Boston area received a lot of rain, breaking records for the amount of precipitation in a month. During this time, the third story windows on the east side of our building leaked lots of water. Thankfully, the brick in this area is exposed and un-insulated because the space is semi-conditioned, though the brick on the rest of the building has been sprayed with 4” of Icynene open cell foam insulation and covered with drywall. After the rains, thick layers of scaling appeared on the brick surrounding the third floor window as well as the second floor window. The building, originally built in 1889, had two envelope consultants during the recent renovation. The close up picture shows one of the water drops falling inside of the building. Looks like it could have used some envelope commissioning.