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Maslak Mh. Ahi Evran Cd. No:21
Polaris Plaza - Floor 26
SARIYER | ISTANBUL / TURKIYE

TR: +90 212 706 97 61
GEO: +49 4921 825 8979
DE: +49 4921 825 8979

info[@]tr.daumer.com

What is Negative and Positive Waterproofing? Elevator Pits and Pool Solutions

What is Negative and Positive Waterproofing? Elevator Pits and Pool Solutions-bg

One of the most complex challenges in structural engineering is managing hydrostatic pressure direction. While swimming pools and reservoirs experience internal-to-external (positive) pressure, structures like elevator pits, basement walls, and retaining systems suffer from groundwater pushing from the outside inward (negative) through concrete capillaries. Standard membranes cannot withstand negative vapor drive, causing immediate blistering and system failure.

The Solution: Dual-Directional Cementitious-Acrylic Matrixes Selecting the appropriate mineral-based mortar depends strictly on the dynamic movement and pressure profile of the site:

  • Absolute Negative & Positive Protection: For critical sub-structures like elevator shafts and retaining concrete exposed to reverse water ingress, the two-component, fully elastic DAUPRO WATERSTOP C-30 delivers flawless dual-side resistance while bridging structural micro-cracks.
  • UV-Exposed Concrete Channels: For prefabricated concrete gutters and open light-load terraces, the white, salt-and-chlorine resistant formula of DAUPRO WATERSTOP C-20 UV provides certified durability. For standard wet rooms and retaining walls, deploying the fully elastic C-20 or the cost-effective semi-elastic C-10 provides a seamless, monolithic waterproofing core.