A 100% Waterproof Swimming Pool in Danderyd, Sweden

Building a waterproof swimming pool is a major investment. For this project in Danderyd, Sweden, the goal was simple: create a concrete swimming pool that would remain permanently waterproof for decades.

What makes this project even more special is that every photograph in this article was taken by the owner during construction. Instead of polished marketing images, you’ll see the actual building process from the first excavation to the finished swimming pool. It is a genuine case study that demonstrates how waterproof concrete can create a durable, long-lasting pool without relying on traditional waterproof coatings.

A real waterproof swimming pool project

This case study follows the complete construction process, showing how Cementmix Waterproof was integrated directly into the concrete to create a swimming pool that is permanently waterproof from the inside out.

The project begins with the excavation

Before any concrete could be poured, the site had to be carefully excavated and prepared. The pool dimensions, depth and levels were established first, creating the foundation for the reinforced waterproof structure that would follow.

Reinforcement and formwork

Once the excavation was complete, the reinforcement steel and formwork were installed. This stage determines the strength, dimensions and durability of the entire swimming pool. Every wall and floor section was carefully reinforced before the waterproof concrete was poured.

Pouring the waterproof concrete

With the reinforcement in place, the concrete could be poured. Instead of adding a waterproof coating after construction, Cementmix Waterproof was mixed directly into the concrete. This created a permanently waterproof pool shell from the inside out, eliminating the need for traditional waterproof coatings.

The waterproof pool shell is complete

The concrete has fully cured and the structural work is finished. At this stage, the swimming pool is already permanently waterproof because Cementmix Waterproof was mixed directly into the concrete. The shell is now ready for the final finishing touches, installation work and filling the pool with water.

A finished swimming pool built to last

The transformation is complete. What started as an empty excavation has become a beautiful, permanently waterproof swimming pool. Because the waterproofing is integrated into the concrete itself, there is no coating that can peel, crack or wear away. The result is a durable pool designed to provide decades of reliable performance and enjoyment.

Why Cementmix Waterproof was chosen

Every swimming pool needs one thing above all else: a concrete structure that remains permanently watertight. For this project, Cementmix Waterproof was used directly in the concrete mix instead of relying only on membranes or coatings afterwards. This made the waterproofing part of the structure itself from the moment the concrete was poured.

Why integral waterproofing is different

Traditional waterproofing systems are applied to the surface after the concrete has cured. While effective, they remain a separate layer that can become damaged over time. Cementmix Waterproof works differently. Because it is mixed directly into the concrete, the entire pool structure becomes permanently waterproof from the inside out, without relying on an additional coating.

Construction begins

Every stage of the construction was carefully documented by the owner. From the first excavation and reinforcement to the concrete pour and the finished swimming pool, these photographs show exactly how the project progressed. They demonstrate how Cementmix Waterproof was integrated into the concrete from the very beginning, creating a permanently waterproof structure built to last.

showing exactly how Cementmix Waterproof was used during construction.

The following photographs were taken by the owner during construction. They show the actual Danderyd project progressing from an empty excavation to the completed waterproof swimming pool.

From excavation to a finished waterproof swimming pool

Every stage of this project was documented by the owner. The photographs show the actual construction process, demonstrating how Cementmix Waterproof was integrated into the concrete from the very first pour.Instead of applying a waterproof coating after construction, Cementmix Waterproof was mixed directly into the concrete, making the waterproofing a permanent part of the structure.The final photograph shows the completed waterproof swimming pool after construction.

The beautiful and waterproof result.

Why this project is different

Unlike many swimming pools that rely on surface waterproofing, this waterproof swimming pool was waterproof from within the concrete itself. By replacing the mixing water with Cementmix Waterproof, the entire concrete structure became permanently water-resistant, eliminating the need for repeated waterproof treatments.

No tiles required

Tiles are optional, not a requirement. Because Cementmix Waterproof makes the concrete itself permanently waterproof, the pool does not depend on tiles or waterproof membranes to prevent leaks. Tiles can still be installed for aesthetic reasons, but the waterproofing is already built into the concrete structure from the moment it is poured.

Built for decades of reliable performance

Swimming pools are exposed to constant water pressure, changing temperatures and years of intensive use. By integrating Cementmix Waterproof directly into the concrete, the waterproof protection becomes part of the structure itself. The result is a durable swimming pool that requires less maintenance and provides long-term protection against water penetration.

Why Ecoform Europe develops long-lasting waterproofing solutions

At Ecoform Europe, we believe waterproofing should solve the problem permanently, not just hide it temporarily. That’s why we developed a range of specialist products that solve moisture problems at their source instead of covering them up. Cementmix Waterproof permanently waterproofs concrete from within, while Permacon protects concrete structures against water penetration, Woodcon extends the life of timber, Ferrocon converts rust into a stable protective layer, and Oppercon creates long-lasting water and dirt repellency for mineral surfaces. Together, these products reflect one philosophy: solving moisture problems at their source with long-lasting, professional solutions built to stand the test of time.

Ready to build a permanently waterproof swimming pool? Discover how Cementmix Waterproof protects your concrete from the very first pour.

Why choose integral waterproof concrete?

Choosing integral waterproof concrete offers significant long-term advantages. Because the waterproofing is built directly into the concrete, there is no separate membrane or coating that can peel, crack or deteriorate over time. This reduces maintenance and increases the lifespan of the structure. Whether you are building a private swimming pool, a decorative pond or a commercial water reservoir, waterproof concrete provides reliable protection from the first day. The Danderyd project demonstrates how this proven method creates a durable, permanently waterproof concrete structure designed to last for decades.