Mechanical Rooms

The owner of the beautiful brownstone residence located at 216 West 132^nd Street in Manhattan was experiencing water intrusion in the basement utility room for many years. The sidewalk and the stoop vaulted masonry foundation walls in this room were made of rubble, which contained deteriorated mortar joints as a result of constant contact with the water over time. In order to properly address this issue, our mechanics raked out the old sand/limestone joints to at least 2 inches in depth and re-pointed them with type s structural mortar. During the procedure, several voids were encountered which were closed off with brick and type s mortar as deep as possible. These voids were filled in with new bricks and mortar (as deep as possible from the interior side) to maximize the effectiveness of our CGI waterproofing system. These voids and the deteriorated mortar joints needed to be filled correctly in order to create the necessary working pressure that is required to maximize the resin-gel penetration within the masonry wall. In addition, filling and patching accordingly could maintain the resin-gel within the depth of the masonry wall during the injection procedure.

Once these actions were completed, the CGI waterproofing system was then implemented within the re-pointed mortar joints by drilling/injecting every 2 feet on center from top to bottom along the perimeter masonry rubble foundation walls. As a result of the masonry walls being very porous and having deep voids, the procedure needed to be implemented very intensely with as much resin-gel needed to occupy these voids to their full depth.  The CGI system was implemented effectively, and the below grade water intrusion was remediated.