top of page

Application Design for Elevator Pit Waterproofing

Upon receiving a request for elevator pit waterproofing specifications at a mid-rise residential building located on Prudential Dr. in Scarborough, Tenera conducted a thorough site inspection to determine the scope required. Consequently, the recommended repair approach encompassed stopping an active leak, repairing a few wall cracks, doing cold joint waterproofing, and the application of a waterproofing membrane.

Stopping Active Leaks

To effectively halt an active leak and prepare for crack repair or patching, a specific repair method is prescribed. Initially, polymer cement is applied to the affected area and dried using a torch. Subsequently, it is coated with adhesive and dried once more with a torch. Following this preparation, a waterproofing membrane layer is applied. This meticulous process ensures that active leaks are promptly addressed, and the surface is adequately primed for subsequent repair work, contributing to the overall effectiveness and longevity of the waterproofing solution.

Crack Repair

To address cracks, the contractor is instructed to open them up using a saw or a chipping gun, and remove any loose debris to provide sufficient adhesion for the materials that follow after an industrial-strength adhesive is applied. Following this, specialised crack-filling material must be used to seal and fill the cracks, restoring the integrity of the slab and preventing further deterioration. This systematic process ensures thorough and long-lasting crack repair, ensuring the durability and stability of the treated surface.

Cold Joint Repair

Cold joint waterproofing is vital for maintaining the structural integrity and longevity of concrete structures. The procedure involves meticulously cleaning out joints to remove any debris or loose material that could hinder adhesion. The joints are then coated with adhesive to enhance bonding before a continuous patch is installed at a 45-degree angle. This reinforces the joint and stabilises it. To further fortify the repair and prevent future water penetration, a fiberglass membrane is applied over the joint, with an upturn on the wall surrounding the elevator shaft perimeter. This comprehensive approach effectively seals the cold joint, minimising the risk of water infiltration and enhancing the structure's durability.

Membrane Installation

As the final step in elevator pit waterproofing, a polyaspartic waterproofing membrane is installed according to our specifications. This membrane is applied over the elevator pit floor, with an upturn on the wall surrounding the entire elevator shaft perimeter, covering the fiberglass upturn. It provides a robust solution for waterproofing and safeguarding the elevator shaft environment. The polyaspartic membrane creates a seamless and durable barrier that effectively seals the floor and walls, preventing water infiltration and corrosion in the demanding conditions typically encountered in elevator shafts. Its rapid curing properties enable quick installation and minimal downtime, ensuring a prompt return to service.

By incorporating polyaspartic membranes, elevator shafts benefit from improved durability, reduced maintenance needs, and an extended service life, ultimately enhancing the overall safety and reliability of the elevator system.

Explore more about our solutions for utility rooms by visiting this link:


bottom of page