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Guilford County Detention Center Tunnel Waterproofing
BACKGROUND: In order to securely move prisoners from the Detention Center to the Courthouse a tunnel was installed under the new facility. An ancient spring runs through this site and proper waterproofing of the below grade structures was critical for long term performance of the tunnel.
CHALLENGE: A tight schedule and a wet site required a durable waterproofing system as well as consistent communication between members of the construction team.
SOLUTION: Voltex from CETCO was chosen for the underslab application and Ultraseal from CETCO was chosen for vertical application. Voltex’s ability to withstand inclement weather and placement of reinforcing steel provided a quality waterproofing system that did not impair the construction schedule. Ultraseal also aided the schedule due to its light weight assisted the installers and its compatibility with green concrete allowed immediate installation after the concrete forms were removed.
RESULT: Foundation was completed ahead of schedule and a dry tunnel for transfer of inmates and supplies was provided for Guilford County.
Wake Forest University/Baptist Hospital
BACKGROUND: The hospital is capturing 30,000 square feet on lower level of parking deck and converting it to conditioned space. The level above this area is where Emergency vehicles unload and this needed to receive new split slab waterproofing.
CHALLENGE: Waterproofing and restoring the critical emergency area within a very tight time line. Because this area is used by the Emergency Department, it was critical that the space reopen as soon as possible. Additionally, because the space below is occupied hospital space, there is zero tolerance for ingress.
SOLUTION: CoreFlex was selected to go over existing hot rubber system in a split slab. The concrete topping was removed, loose membrane removed, concrete was repaired where necessary, leak detection device was installed, CoreFlex was installed and new concrete topping was poured.
RESULT: The space was back in use within the required time line and the customer is very pleased with the outcome. CoreFlex has been installed on a second phase of this project.
Additionally, the owner selected to participate in the HydroShield Quality Assurance Program. Because of the tight time line and the importance of the area being waterproofed, any delays would jeopardize the success of the project. HydroShield ensured proper, inspected installation and timely communication allowing problems or concerns to be addressed without causing delays.
BACKGROUND: As the final step of a two year restoration project, the Homeowners of Sandpiper Run needed the elevated and vegetated access to the beach and pool waterproofed. It was important to them that this access be ready for use by Memorial Day and they insisted on a short construction schedule.The contract documents included a substantial liquidated damages clause that would activate if the project was not finished by Memorial Day weekend.
CHALLENGE: A tight timeline, significant damage to the existing membrane and occupied space. March and April tend to be rainy on the South Carolina coast making the above mentioned challenges that much more apparent.
SOLUTION: CoreFlex was chosen for three primary reasons: 1) existing membrane was not required to be removed, 2) CoreFlex installation is unaffected by damp substrates and 3) CoreFlex installation is much quicker than alternatives. Additionally, GreenScapes Green Roof Systems by CETCO was selected to complete the deck with functional green space providing the owners with a single source solution.
Because CoreFlex requires minimal demolition, work began immediately. The applicator simply melted the existing membrane into the concrete, installed a conductive grid allowing for Field Vector Mapping and loose laid CoreFlex onto the deck. Upon completion of the detailing, Field Vector Mapping was conducted to ensure there were no voids in the waterproofing prior to placement of the growing media.
Finally, the owners and designers opted to participate in the HydroShield Quality Assurance Program. With this participation, all parties have the confidence to know that their waterproofing system was installed by CETCO approved applicators and inspected by a third party inspection firm.
RESULT: Sandpiper Run Homeowners were able to access the beach and pool on these rejuvenated areas on Memorial Day Weekend.