Ensuring Fireproof and Watertight Service Penetrations
In construction projects, ensuring that service penetrations are both fireproof and watertight is crucial for safety and efficiency. This project in London involved Total Specialist Maintenance (TSM) collaborating with a construction contractor to address critical sealing issues in waterproof concrete walls and soffits.
The Challenge
The construction contractor had cored through waterproof concrete walls and soffits to install service penetrations for various systems, including electrical, gas, drainage, sprinkler, air conditioning, and water services. This resulted in penetrations that were neither fireproof nor watertight, creating an urgent need for remediation to meet safety standards. Key challenges included:
- Safety Compliance: Ensuring that all penetrations met fire safety regulations and maintained the structural integrity of the concrete walls.
- Preventing Water Ingress: Addressing the potential for water ingress through the unsealed penetrations, which could compromise the functionality of the systems and the safety of the structure.
The Solution
TSM implemented a comprehensive sealing strategy that involved several essential steps:
- Plugging the Annulus: The first step was to seal the gap between the host concrete and the pipe using an F120 fire-rated concrete repair mortar. This material was specifically chosen for its fire-resistant properties and was allowed to cure to create a solid barrier.
- Making Penetrations Watertight: After plugging the annulus, TSM drilled through the curing mortar to inject a structural waterproof polyurethane injection resin. This process ensured a watertight seal around the service penetrations, effectively preventing any potential water ingress.
- Finalising Repairs: To restore the integrity of the wall and ensure full compliance with safety standards, TSM made good the holes with additional F120 fire-rated concrete repair mortar. This final touch reinforced the fireproof characteristics of the penetrations, ensuring they met all regulatory requirements.
Project Management Excellence
TSM’s project management team coordinated all aspects of the sealing process, ensuring that the work was completed efficiently and within the project timeline. Regular communication with the construction contractor helped to streamline operations and minimise disruptions.
Safety Considerations
Safety was a top priority throughout the project. TSM adhered to strict safety protocols to protect workers and ensure compliance with industry standards. All materials used were selected for their fire resistance and waterproofing capabilities, enhancing the overall safety of the installations.
Environmental Considerations
The materials chosen for the sealing process were environmentally friendly, minimising any potential impact on the surrounding area. TSM’s commitment to sustainable practices ensured that the project aligned with best practices for environmental safety.
