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Piston Waterproofing in Elevator Pits

A specialised repair project was just completed at a medical facility on Lake Shore Blvd. W in Etobicoke – waterproofing of a piston housing and the entire elevator pit, including the cold joints formed by floor and walls.


Repair Method

Cold Joint Waterproofing

A critical aspect of waterproofing in elevator pits is addressing cold joints, where the floor slab meets the walls. These junctions are susceptible to water leakage due to inherent structural weaknesses. To fortify these cold joints and render them impervious to water, we employ a proven method. Beginning with thorough cleaning via chipping, we then apply a continuous patch along the entire joint at a 45-degree angle.

Subsequently, a waterproofing material is applied over the cold joints to enhance their water resistance. An fiberglass upturn is done on the walls for the entire pit perimeter, covering also the cold joints, in order to prevent any future leaks, thus providing a reinforced waterproofing solution.


Waterproofing Membrane Application

The final step of our waterproofing process entails applying a polyaspartic waterproofing membrane. This high-performance coating is uniformly spread across the entire floor of the elevator pit and extends onto a portion of the walls. By effectively sealing the entire area, including the previously reinforced cold joints, the polyaspartic coating offers rapid curing, excellent adhesion, and exceptional resistance to wear and tear. This ensures long-lasting and reliable waterproofing results, maintaining the elevator pit's integrity and safety.


Piston Housing Waterproofing

Our specialized repair procedure for piston housing ensures a durable waterproofing solution. Firstly, any accumulated water is pumped out, followed by a thorough cleaning of the top surface of the piston housing. We then inject a polyurea-based foam into the housing, effectively sealing any potential leaks. Next, a primer is meticulously applied to the walls of the piston housing to enhance adhesion. Subsequently, we employ a specialized waterproofing filler to further reinforce the seal. An industrial-strength adhesive is then meticulously applied to facilitate the proper installation of a two-inch concrete layer, adding structural integrity. Finally, the newly installed concrete is coated with primer, fully sealing the area around the piston housing and ensuring long-lasting protection against water damage.


Learn more about out waterproofing solutions for elevator pits by checking this page: https://www.jointsealwaterproofing.com/elevators




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