How to: Surface sealing of bored pile walls

Separate layers, in front of bored pile formworks, are recommended for concrete saving and possible fine adjustment of basement walls in contrast to less accurate bored piles.

The sub-structure waterproofing system Zemseal^® is applied where high-grade surface sealing is required - offering complete protection against moisture ingress. Zemseal^® is applied to the flat layer of the Pecafil^®, eliminating the need for subsequent crack injection - especially in concreted areas where access is limited or difficult.

• Apply the Pecafil^® sheets to the bored pile wall and secure with a nail gun or by using dowels.
• Pre-fold the Zemseal^® membrane for corner installation later on. After concreting the base slab, the Zemseal^® sheeting should protrude approx. 500 mm upwards for easier connection.
• Position the prepared Zemseal^® corner profile, followed by the surface sealing for the floor, on the blinding layer.
• Concrete the floor slab. Ensure that Fradiflex^® metal water stop is installed in the construction joint between the floor slab and the wall.
• Attach pre-cut Zemseal^® sheets in strips with Zemseal^® adhesive tape (50 mm). Gluing with vertical strips can be done at intervals of approx. 1000 mm (gluing on the protruding wire of the Pecafil^® mats).
• Reinforce wall, position wall formwork and concrete wall.