Exterior basement waterproofing from inside the building? In the case of renovation, it is not always possible to expose the exterior walls through excavation. For example, where the area to be excavated is built upon, traffic concerns impede the excavation, or the economic cost of excavation is deemed too high. You would first think of an internal (negative side) basement waterproofing, but in some cases, such as in historical buildings or buildings with special architectural requirements, this may not be desirable.
In these cases, a curtain injection with KÖSTER Injection Gel G4 is possible: The resin is injected through the wall from the inside to the outside. Water present behind the wall does not represent a challenge for the KÖSTER injection gels since they do not react with it, but instead it is bound in its matrix, resulting in a waterproof elastic solid body.
The injection is carried out with a special two-component pump, KÖSTER Acrylic Gel Pump, and through special KÖSTER injection packers.
Taking advantage of the extremely low viscosity of the gel, injection into difficult soil conditions like fine sand, silt and some clays is possible.
Always adhere to the specifications in the respective Technical Guidelines.