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PREFLEX 3000 membrane lining a lift pit floor and walls, with pile heads sealed
● Project · Below ground

Lift pit waterproofing project PREFLEX 3000

A lift pit lined with PREFLEX 3000 before the concrete goes in: the floor, the walls and every pile head.

System
Below ground
Product
PREFLEX 3000
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What was built

  • PREFLEX 3000 sheet membrane laid over the pit floor and up the formwork walls, before the steel and the pour.
  • Every pile head detailed where the starter bars come through the membrane.
  • The wall to floor junction closed off all the way round.

The result. The pit is tanked from the outside before the pour, so the new concrete is cast straight onto the membrane.

Photos from site

Lift pit lined with PREFLEX 3000, seen from aboveInstaller walking the PREFLEX 3000 lined lift pit between the pile headsPREFLEX 3000 on the lift pit wall behind sealed pile headsClose view of a sealed pile head on PREFLEX 3000

System and products used

SystemBelow-Ground Waterproofing & Basement TankingThe full build-up, layer by layerProductPREFLEX 3000Pre-applied HDPE membrane laid before the pour, so water cannot migrate laterally between membrane and concrete.
DetailsTDSWhere to buy

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