Waterproofing pool in Lavis (Trento): an integrated system to ensure watertightness and durability

The project in brief

Construction typology
Public
Year
2024
Place
Lavis (TN)
Applicator
Mosca Costruzioni di Valdaone/Edilriparazioni - Rovereto
Designer
Ars Engineering
Products used
See all

Waterproofing an in-ground pool is one of the most complex applications in the hydraulic engineering sector. The structure must guarantee a perfect seal for the water contained within the pool while also resisting the potential pressure of groundwater from outside.

Concrete joints, expansion joints, penetrations, and construction details require specific solutions capable of ensuring waterproof continuity and durability over time.

9 aspettativa finale

The Challenge

This is the context of the project carried out at Lavis (Trento): a 12 x 25-meter in-ground concrete pool.

The concrete structure was already casted in place. The goal was to ensure that a pool of that size would not leak water from inside or allow water to enter from outside.

Being in-ground, the pool was exposed to potential groundwater across its entire exterior surface. The waterproofing system therefore had to work in both directions: positive pressure (retaining the pool water) and negative pressure (resisting the groundwater pushing in from the outside).

The design proceeded by priority: first sealing the critical points, then waterproofing the entire surface.

Volteco Solutions

The project was developed according to a system concept, first addressing all the critical points of the structure and then continuously waterproofing the entire pool.

The construction joints between the foundation slab and the walls were sealed using the Bi Flex System with Bi Bond epoxy adhesive, creating a flexible and continuous connection in the areas most at risk of infiltration. The same system, integrated with Akti-Vo 201 hydro-expansive mastic, was also used to seal penetrations, such as vents, lights, and utility ducting systems.

The entire interior surface of the pool was then waterproofed with Plastivo 250, a two-component, elastic cementitious coating that provides protection against both positive and counterthrust, while also ensuring high resistance to the chemical agents normally present in treated water.

One of the most delicate aspects of the project involved the prefabricated overflow channel, made up of modular elements resting on the upper edge of the pool. The presence of numerous joints between the prefabricated elements and the support point on the perimeter wall required a solution capable of ensuring waterproof continuity even with particularly complex geometries.

For this detail, Bi Flex System was used for the connection between the channel and the structure, Bi Mastic for sealing the joints between the prefabricated elements, and Bi Mortar Raso Seal as a continuous elastic coating for the interior surface. In addition to its high waterproofing performance, the white coating also met the aesthetic requirements of the channel, which will remain exposed.

The Result

The project resulted in a fully waterproofed swimming pool, specifically addressing all the critical issues typical of an underground structure designed to contain water. The interaction between design, Volteco technical support, the construction company, and specialized installers resulted in a continuous, reliable, and durable system capable of ensuring the full functionality of the structure over time.

Once again, the project confirms that each swimming pool is a unique case, in which the choice of waterproofing system must be based on an analysis of the construction conditions, expected stresses, and construction details. It is precisely this ability to develop integrated and customized solutions that allows us to transform a technical issue into a lasting project.

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Products associated with the value project

PLASTIVO 250

Two-component flexible waterproofing compound.

AKTI-VO 201

Synthetic rubber hydro-expansive mastic.

BI FLEX SYSTEM

Elastic tape based on TPE polymers and epoxy adhesive for gluing.

BI BOND

Epoxy adhesive to bond Bi Flex tape.

BI MORTAR RASO SEAL

Waterproofing and finishing coating

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