10-story office building; required comprehensive exterior waterproofing
The building had experienced water infiltration problems since its original construction. Previous measures that had been taken by several waterproofing industry professionals had proven ineffective.
Metropolitan was contracted to provide the building owner with a comprehensive evaluation and resolution of the building’s water problem. To identify the source of the water problem and isolate those areas that were subject to water infiltration, Metropolitan utilized a technologically advanced diagnostic tool and technique – a boroscope. The boroscope uses a miniature camera mounted on the end of a 3/8″ diameter optic fiber tube. The camera was inserted into the wall cavity, behind the brick veneer, by drilling 3/8″ holes in the wall in order to inspect the building’s concealed flashing system and chronic leak areas. Once the specific areas where water was penetrating through the building were revealed and isolated, these problem areas were shown to the building owner and manager via videotape.
Metropolitan then removed the brick veneer to expose the isolated water problem areas and repaired the flashing in only the specific areas where there was water infiltration. The firm then reconstructed the brick work to color-match the building’s existing brick and mortar. Modern building construction dictated the use of high strength brick and mortar.
In addition to thru-wall flashing/sub-surface repair, Metropolitan replaced all sealant joints in the building, including vertical control joints, and horizontal relieving angle joints using urethane sealant. Window frames to glass joints in the masonry were also replaced using high performance silicone sealants.
The sophisticated and proven diagnostic approach employed by Metropolitan to determine the specific source of the structure’s water problem enabled the waterproofing project to be handled efficiently. The specific water problem areas were pinpointed and therefore no extensive demolition of the building’s brick veneer was necessary.