Water Tanks and Water-Retaining Structures
Making tanks and reservoirs in permanent water contact watertight from the inside and the outside, with systems certified for drinking water contact.
This time the duty is reversed: the water must stay in.
A water tank is a special structure where the logic of waterproofing works in reverse. While on every other surface we try to keep water away from the structure, here the water must be held safely inside while the structure is protected from the effects of permanent water contact. And in drinking water tanks, one more dimension is added: the selected system must be certified as suitable for water hygiene.
In tank work we know the facility’s reality: a tank is a resource the operation needs, and it cannot stay out of service for long. That is why we plan the application to minimize the time the tank is offline, and before handover we test the watertightness and record the results.
- Certified system selection: In drinking water tanks, systems certified for water contact are used.
- Two-way protection: While the water is held inside, the structure is also protected from the effects of permanent contact.
- Short downtime: The application is planned around the tank’s operating schedule.
- Testing before handover: The work is not handed over before watertightness is verified.
In every structure that must hold water safely.
Tank waterproofing covers a wide scope, from drinking water to fire reserves, from new construction to repair.
Drinking water tanks
Tanks requiring systems certified for water hygiene.
Fire water tanks
Fire reserve tanks that must be ready at all times.
Process water tanks
Tanks meeting production’s uninterrupted water demand.
Underground cisterns
Structures working under two-way water exposure below ground.
Repair and renewal
Reclaiming tanks that leak or have reached the end of their life.
Details and transitions
Pipe penetrations, valve chambers and connection points.
Views from the field.
Sample images from applications in different buildings and conditions.
A surface that lives with water, permanently.
Tank waterproofing works under uninterrupted water contact from the moment it is applied. The layers’ duty is not watertightness alone; it is also protecting the structure and keeping the interior surface cleanable.
- WaterThe medium the system works in, in permanent contact.
- Interior finish surfaceThe cleanable interior surface layer, suitable for water hygiene.
- Waterproofing layerHolding the water inside: the layer carrying the system’s real duty.
- Surface preparationThe stage where the surface is prepared so the waterproofing can be applied without interruption.
- Structural elementThe concrete structure the system protects, its condition assessed beforehand.
The right approach for the tank’s condition.
A new build and the renewal of a tank in service require different planning and different approaches.
Internal application
Watertightness and finish solution from the tank’s interior surface.
External application
Protection of soil-contact exterior surfaces.
Repair and renewal
Reclaiming an existing tank after diagnosis.
Detail and transition solutions
Localized continuity at pipe penetrations and connections.
What is expected of a tank waterproofing.
Reliable watertightness
Verified water retention, tested before handover.
Suitability for water hygiene
Systems certified for drinking water contact.
A cleanable interior surface
An even surface fit for periodic maintenance and cleaning.
Protects the structure from within
Cuts off the effect of permanent water contact on the structure.
Predictable commissioning
Planned handover in step with the operating schedule.
Traceable records
Application steps are documented and handed over at delivery.
The tank’s history defines the scope of the work.
The classification below is indicative only. The final scope is determined by assessing the tank’s existing condition, its intended use and the operating conditions on site.
Tank waterproofing, or another system?
If your situation is close to one of the following, let’s evaluate a more suitable system together.
Technical documents for members
Technical data sheets, safety data sheets and application specifications are available in the membership area open to corporate clients, architects and engineers. Access is free with membership.
Other waterproofing systems
Let’s commission your tank with confidence.
Are you building a new tank, or dealing with a watertightness problem in an existing one? Let us assess the need on site and plan the application around your operating schedule.