Chemical Injection is particularly effective for problems such as:

• Basement water ingress
• Leaking blockwalls and brickwork
• Concrete Pools/ponds/spas and tanks
• Lift pits
• Cracked concrete with water ingress
• Car parks
• Overhead concrete ceilings
• Warehouses
• Concrete slabs

Polyurethane and epoxy are common types chemicals that when injected, stop water leaks within solid structures (concrete, blockwork, brickwork etc). When polyurethane or epoxy is injected in the affected areas correctly, it and then expands and solidifies to act as a physical barrier from within the crack/joint. This, in conjunction with other solutions works to eliminate water ingress.

Waterstop Injection – Water Ingress Solutions for concrete structures

Hydrostatic pressure can often cause water to seep through the floor to wall joints in infill slab constructed buildings. Prolonged rainstorms cause many buildings to leak. Sometimes areas that did not cause any noticeable issues during previous rain events, become a passageway for water entry.

If you discover any small voids and cracks in the concrete, blockwork or floor to wall joints that can allow external water to seep through, it is best to seal them promptly so that they do not become a passageway for water ingress that could lead to serious issues in the future if left untreated. If you see moisture ingress in areas such as the slab or through the wall, the first thing you need to do is to identify the source of the leak. Common causes of water ingress through the floor to wall joints in infill slabs:

• Inadequate or compromised waterproofing
• Excess groundwater from rain runoff not properly managed
• Cracks in the concrete or masonry wall and /or slab
• Hydrostatic pressure

The hydrostatic pressure from the rising water table and the lateral pressure from saturated soil are pushing the excess water into basements slabs, foundation and retaining walls making them susceptible to water ingress through cracks, porous building materials, holes, joints and/or inadequate waterproofing.

Poor drainage may cause water to collect against a concrete foundation and retaining walls during heavy and persistent rain events and may build up the volume to cause problems attributable to lateral and hydrostatic pressure. Steps taken to direct water flow away from basements/foundations and eliminate pooling will reduce the chances of water building up around the building.

An important note is that even if the waterproofing system is in perfect condition, water can still enter the property through the cold joints around the perimeter of the slab due to the increased hydrostatic pressure. Water ingress in the floor to wall joint is commonly experienced during heavy rain due to the rising water table bringing the groundwater closer to the surface. This increases the hydrostatic pressure to the slab of your building and it can force water to pass through the construction joint between the floor and the wall, so that this joint effectively begins working as a highway passage for water.