Metro Waterproofing, a trusted name in building maintenance and restoration for over 50 years, was recently tasked with an exciting project at the Grand Hyatt Memphis, Tennessee. Their mission was to install a state-of-the-art waterproofing system for the hotel’s below-grade

parking garage. Although the project came with its fair share of hurdles, including unpredictable weather conditions and a demanding schedule, the Metro Waterproofing team rose to the occasion with enthusiasm – and a strong partnership with Polyglass.

Project Background and Challenges

In the later months of 2022, from November to December, Metro Waterproofing embarked on a project that involved installing a waterproofing system for a 1,650-square-foot below-grade parking garage at the Grand Hyatt Memphis, Tennessee. The project encountered several challenges that the team had to overcome to ensure successful completion.

The colder weather presented difficulties, as cold temperatures can sometimes cause certain materials to become less flexible or more difficult to apply, potentially affecting the overall effectiveness of the waterproofing system.

The sandy soil at the construction site also posed a challenge as it retained water, creating unstable and wet conditions that complicated the installation process of the waterproofing system. This water retention in the soil could potentially undermine the effectiveness of the waterproofing materials and make it more difficult to achieve a secure and watertight seal.

The presence of excess water in the soil might have required additional measures to ensure that the waterproofing system could be effectively applied and function as intended.

Solution and Installation

To tackle the challenges posed by the colder weather and wet soil conditions, Metro Waterproofing utilized specific Polyglass products that were designed for optimal performance in such situations. These products included Mapeproof™ AL PRO, Mapeproof™ Liquid Membrane, and Mapeproof™ AL Detail Tape.

Mapeproof™ AL PRO, a pre-applied, fully bonded HDPE waterproofing membrane, was used as the primary waterproofing solution for the below-grade parking garage. This product’s adhesive bond to concrete prevented lateral water migration, ensuring a watertight seal despite the wet soil conditions.

For areas requiring additional attention, such as pipe penetrations and critical joints, Mapeproof™ Liquid Membrane was applied. This dual-component, non-sagging, and solvent-free membrane offered strong tensile and shear strength. Its longer pot life made detailing complex areas more efficient. The membrane’s cold-applied, chemical curing properties made it suitable for the cold weather throughout the project.

Mapeproof™ AL Detail Tape was used to further strengthen the waterproofing system. This two-sided, pressure-sensitive tape created a strong bond to the concrete and Mapeproof AL Pro membrane, ensuring watertight details and allowing for heavy foot traffic during construction. The tape’s flexibility helped the team address the challenges posed by the sandy soil retaining water.

The combination of these Polyglass products provided Metro Waterproofing with a comprehensive waterproofing solution that was able to withstand their project’s unique challenges. The team’s positive experience with Polyglass products not only led to a successful outcome but also fostered an ongoing relationship between the two companies.

Matt Jewett, Project Manager for Metro Waterproofing, commended the products, saying, “The simplicity of the detailing made for a very cost-effective installation, and a superior finished product. Technical services were extremely helpful and always available.”

Product Information

The following Polyglass products were used in the project:

Mapeproof™ AL PRO: A high-density polyethylene (HDPE) waterproofing membrane designed for use in below-ground applications. It is pre-installed and fully bonded to the surface, ensuring a strong connection to poured concrete. This bond helps protect structures from water infiltration and lateral water movement that could compromise their integrity.

The membrane can withstand wear and tear from construction activities and environmental factors. One of its key features is the easy-to-apply self-sticking side laps, which allow for seamless connections between adjacent sheets of the membrane, providing a continuous waterproofing layer. It also boasts excellent chemical resistance.

Mapeproof™ Liquid Membrane: A two-component, cohesive liquid waterproofing solution designed for use in both above and below-ground applications. It’s a solvent-free, spreadable membrane that works in conjunction with Polyglass waterproofing membranes to provide enhanced waterproofing protection in a wide range of situations.

The liquid membrane can withstand all kinds of forces and stresses applied to the waterproofing system without breaking or tearing. It also has an extended working time, which allows construction professionals to work with the material for longer periods, making it suitable for intricate and complex projects. This added flexibility enables the accurate application of the membrane in areas with challenging details.

Mapeproof™ AL Detail Tape: A double-sided, pressure-sensitive tape that has been specifically engineered for use in below-ground waterproofing projects, particularly in areas that require detailing. Its primary function is to create a strong, continuous adhesive bond between the waterproofing membrane and the concrete surface. This helps the system effectively prevent the sideways movement of water through the construction materials.

The tape’s flexibility is one of its key features, allowing it to be easily applied and molded to various shapes and surfaces, so even complex details are properly sealed and protected from water intrusion. The Mapeproof™ AL Detail Tape is also designed to be able to withstand foot traffic during the construction process, helping it maintain its integrity and minimize the risk of damage throughout the project.

For more information about Polyglass’ range of waterproofing products, visit