The Project

As part of this new-build development on Blackfriars Road in Southwark by a major UK residential developer, a large 2.5m x 1m fibreglass tank had been installed in the basement. However, during the concrete pour the tank had developed a large crack in the base, allowing a steady and high-volume flow of water into the tank.

  • 1. The cracked tank in the basement was allowing the ingress of large volumes of groundwater

  • 2. ASF Waterproofing first drove packers down through the slab to a depth of 2.5m around the tank

  • 3. Being a single-component product Newton 320-FP is quick and easy to use on site

The Solution

The contractor called upon Newton’s new range of high-quality injection resins, as well as specialist injection contractor ASF Waterproofing to remedy the situation.

ASF Waterproofing initially observed that the flow of water was too great to inject polyurethane directly around the crack, as the resin would have simply been washed away. Instead, to slow the water down, drive packers were inserted into the substrate around the tank to a depth of 2.5m, and injected with Newton 320-FP polyurethane sealing resin. This new resin reacts extremely quickly on contact with water, foaming to provide a rigid, high-strength seal that rapidly stems water ingress.

With the flow of water into the cracked tank effectively slowed and then brought to a complete stop by the 320-FP resin, ASF Waterproofing then injected around the crack itself. This was achieved by installing Sheet Pile Packers and injecting the substrate with another new injection resin, Newton 322-SP in order to fill any remaining voids and provide the final seal. This two-component resin can be applied in either wet or dry scenarios to form a flexible and high-strength seal that will not shrink whilst curing, and will not corrode or react over time.

“Newton’s level of site support and their next-day deliveries into London using their own vans meant that we could get the necessary products, equipment and manpower to site quickly on this job, which was important to the client to get a quick solution. 

As a contractor with years of experience using injection resins for remedial repairs and waterproofing, we know what we’re doing - the new injection resin products from Newton are therefore spot on as they cover a good number of different capabilities, meaning they’ve got a product for almost any injection resin requirement.”

Shaun King, Director, ASF Waterproofing - Newton Specialist Contractor

  • 4. Once injected into the substrate, the 320-FP reacted quickly with the ground water to provide a seal

  • 5. With the flow of water stemmed, ASF Waterproofing could now get inside the tank to inject Newton 322-SP

  • 6. Job done - with both resins providing an effective seal against water, ASF and Newton could leave happy

The Result

In just one day on site, Newton and ASF Waterproofing identified the correct products required to stem the flow of water, then seal the crack completely. Newton’s new range of injection resins are also applicable in all construction scenarios requiring leak sealing and/or structural repairs.

Related Articles

  • Structural & Concrete Repairs

    Advanced concrete repair mortars, and injection resins to seal structural and non-structural cracks, whether they are dry or leaking large volumes of water. 

  • Concrete as a Water-Resistant Material

    When tasked with designing a waterproofing solution for below-ground structures, it is important that the design should adhere to prevalent industry recommendations.