Assisted builder in identifying source of leaks within this church located in Hayward, California. Building was fairly new and was leaking adjacent to a few windows within the cement plaster clad walls. Isolation testing was performed to identify the source of the infiltration. Water was noted to be entering through the perimeters of the window frames at failed sealant joints. The sealants had not properly been bonded to the window substrate and in some instances the sealant joint was not sufficiently sized to allow for the proper sealant profile. Recommendations were made to inspect the sealants and to replace the caulking as necessary to keep water from accessing the outside perimeter of the window frames.