PREPRUFE® Unique Watertight Structural Solutions Protect the Warsaw Spire Construction

Warsaw Spire
Bakkala Consulting Engineers - Dublin
Jaspers & Eyers Architects - Brussels
General Contractor
Monting - Warszawa
2 K Serwis - Warszaw
GCP Solution
PREPRUFE® waterproofing

Warsaw Spire is a unique office project under development in Warsaw’s city centre. Created with the vision in which office space is harmoniously combined with a unique approach to modern urban space. The project lies at an epicenter of the capital, with modern office buildings and prestigious residential projects, as well as excellent transport, including trams, buses and a second metro line under construction.

The complex’s structural design solutions include a 180-metre high tower building (48 levels) and 2 lower buildings, each of 55 metres in height (15 levels). Together, they will provide approximately 100,000 m2 of office space equipped with the latest technical solutions. It’s the largest office development currently under construction in Europe.

"GCP Applied Technologies has once again provided a proven, high-performance waterproofing solution that will ensure this prestigious and ambitious construction project stands the test of time."

With five levels of underground parking below the development and foundations that reached a depth of 55 metres, the contractor had to come up with intelligent structural solutions and had to construct one of the deepest diaphragm walls in Poland. It required a high performance membrane to provide fully bonded waterproofing, zero water tracking, and exceptional concrete protection.

With the basement area subjected to 18 meters of hydrostatic water pressure, PREPRUFE® waterproofing membrane proved the ideal structural design solution, offering the perfect combination of outstanding water-tightness, proven performance, and a simple application process. Its reliable, practical and unrivaled standards of below ground waterproofing protection made it the obvious choice.

More than 13,000 m2 of PREPRUFE® 300R membrane were specified to complete a comprehensive waterproofing system for the basement. Three separate structures with infill sections made detailing intricate for the basement considering the structures are to settle independently.

Designed with a proprietary adhesive layer, the ADVANCED BOND TECHNOLOGY™ enables concrete to aggressively adhere to the PREPRUFE® membrane, forming a unique seal which prevents any water migration between the waterproofing layer and the structure to substantially reduce the risk of leaks. As a result, potential breaches are localized to prevent water tracking between the waterproofing membrane and the structure.


Unlike other structural solutions, the PREPRUFE® waterproofing membrane does not rely upon hydration processes or swell in contact with water, and can withstand a 70m head of water, therefore is truly waterproof. It remains sealed to the structure, regardless of the ground settling, and is lightweight, flexible and versatile.

It can also be applied on wet substrates or in extreme heat and is immediately ready without protective layers to receive rebar installation, proving to be more than five times faster to install than a traditional loose-laid PVC system.

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Last Updated: 2024-06-21