Damage to existing buildings is often caused by leaking pile foundation heads. Water can enter the building through the construction joints or make its way along the reinforcement. The waterproofing of pile heads has to withstand the weight of the whole building and needs to be easily connected to the area waterproofing.
All non-load bearing materials, laitance, and protuberances have to be removed from the surface of the pile head. The mineral corrosion protection materials KÖSTER Z1 and Z2 are applied to the exposed reinforcement. These special polymer modified slurries are respectively grey and red to allow for a visual control of the application.
The surface is then rounded and re-profiled with KÖSTER Repair Mortar R4. This reprofiling also includes the installation of a fillet adjacent to the pile head. The pile head and fillet are then waterproofed with KÖSTER NB 1 Grey, generously bringing the KÖSTER NB 1 Grey up the reinforcement and onto the area around the pile head, at least 20 cm.
Alternative to KÖSTER Deuxan 2C, the waterproofing layer can be made with KÖSTER KSK SY 15. KÖSTER KBE Liquid Film is used as a primer on the entire surface as well as on all overlaps around the pile head. The gliding layer for this system consists of only one layer of PE Foil.
Always adhere to the specifications in the respective Technical Guidelines.
