Arktelier Arquitectos has designed a roof for the children's play area in Plaza Olaeta, located in the municipality of Hernani, Spain. The intervention proposes a lightweight structure that protects the plaza's daily activities and allows for extended enjoyment, maintaining the open character of the public space.

The design is conceived as a folded surface reminiscent of a paper airplane or a hang glider. It also seeks to integrate into the surroundings through a discreet presence, combining protection and permeability, while offering a meeting place with natural light and a seamless connection to the outdoors. 

The project by Arktelier Arquitectos covers an area of ​​approximately 410 m², unfolded like a triangular fan articulated by successive folds. These folds create gabled slopes that energize its profile and facilitate rainwater runoff. The lowest point is located at a height of about four meters, a difference of 1.70 meters from the highest point, and features V-shaped pillars that reduce the number of supports and free up the space below.

The construction system combines standardized steel profiles and metal pillars supported on isolated reinforced concrete footings. The upper enclosure is made of translucent polycarbonate panels, fixed with an aluminum profile system that allows natural light to filter into the protected area.

Roof for a children's playground in Hernani by Arktelier. Photograph by Aitor Estevez Olaizola.

Roof for a children's playground in Hernani by Arktelier. Photograph by Aitor Estevez Olaizola. 

Descripción del proyecto por Arktelier Arquitectos

The proposed intervention in Plaza Olaeta stems from a simple yet profound intention: to protect play. In this triangular corner of the urban fabric, where the greenish rubber flooring welcomes the restless footsteps of young children every day, the plan is to construct a lightweight roof that will allow the space to be enjoyed year-round, without rain or intense sun interrupting the life that unfolds there.

1. The Site
The triangular plot currently houses a children's play area with a rubber surface. Its open, exposed, and weather-sensitive nature makes the plaza a space of intermittent use. The new roof aims to expand the possibilities of this public space, offering a welcoming shelter that doesn't limit the freedom of play, but rather complements it.

Cubierta para parque infantil en Hernani por Arktelier. Fotografía por Aitor Estevez Olaizola.
Roof for a children's playground in Hernani by Arktelier. Photograph by Aitor Estevez Olaizola. 

2. The Concept
The proposal is conceived as a folded surface, a light piece that seems to have gently descended from the air, like a paper airplane or a hang glider that lands delicately on the plaza. This metaphor guides the project's geometry: a roof that doesn't impose itself, but rather floats, supported by a minimal series of V-shaped metal pillars. Its presence is firm yet discreet, allowing the space beneath it to remain completely unobstructed, without interfering with the existing play areas.

3. Geometry and Dimensions
The roof, approximately 410 m², unfolds like a triangular fan with sides reaching 23.30 meters, while the perpendicular sides measure 8.30 meters on its east face and 26.50 meters on the west. The surface is articulated through successive folds, creating a series of gabled slopes that lend dynamism to the profile and facilitate rainwater runoff. The lowest point is located at around 4.00 meters in height, and the difference between the highest and lowest points reaches 1.70 meters, creating a vibrant silhouette that engages with the sky.

Cubierta para parque infantil en Hernani por Arktelier. Fotografía por Aitor Estevez Olaizola.
Roof for a children's playground in Hernani by Arktelier. Photograph by Aitor Estevez Olaizola. 

4. Structural System
The structure is built using standard steel profiles, supported by V-shaped metal pillars. This design reduces the number of supports and frees up the space beneath, maintaining the open character of the plaza. The pillars are founded on isolated reinforced concrete footings, ensuring stability and durability without significantly altering the existing environment.

5. Materials and Finishes
The roof is completed with translucent polycarbonate panels, fixed using an aluminum glazing profile system. This solution allows natural light to penetrate the surface, creating a bright and sheltered environment where shadow is not darkness but filtered light. Rainwater collection is achieved through pre-lacquered sheet metal gutters and steel downpipes, discreetly integrated into the overall geometry.

Cubierta para parque infantil en Hernani por Arktelier. Fotografía por Aitor Estevez Olaizola.
Roof for a children's playground in Hernani by Arktelier. Photograph by Aitor Estevez Olaizola. 

6. Spirit of the Intervention
The intervention is conceived as a minimal gesture with maximum impact: a lightweight element that enhances comfort, expands the daily use of the plaza, and complements public life without imposing itself. The roof is not intended to be the focal point; Its role is that of a protective wing, a gentle presence that transforms the space without disrupting its essence. In its folds, its transparency, and its lightness, the architecture becomes a small urban poem: a structure that protects without enclosing, that covers without concealing, that accompanies without dominating, integrating structure, geometry, and functionality into a single architectural gesture.

More information

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Architects
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Arktelier Arquitectos. Lead architects.- Oiane Ania Zubiaur, Estanislao Fernández Narbaiza, Haritz San Francisco Lasa.

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Client
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Hernaniko Udala - Hernani City Council.

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Contractor
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Draga Group (draga sl).

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Dates
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July - December, 2025.

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Location
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Hernani, Spain.

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Photography
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Arktelier Arquitectos is an architecture practice founded in 2008 by Oiane Ania Zubiaur, Estanislao Fernández Narbaiza, and Haritz San Francisco Lasa, based in Donostia-San Sebastián, Spain.

Since then, the studio has developed a broad practice encompassing multi-family and single-family housing, industrial architecture, renovation, interior design, and public projects, guiding each commission from the initial concept to its completion.

The team combines specialists in design, structures, building services, and computer graphics, enabling them to offer comprehensive solutions tailored to the needs of each client and project.

Over nearly two decades, the studio has cultivated a defining characteristic of its architectural approach: a quiet precision, a method of intervention that avoids noise and seeks clarity. Their projects are characterized by a keen understanding of the site and the ability to transform spaces with restrained, intelligent gestures that are deeply respectful of their context. It's not about pursuing a style, but about cultivating an attitude: integrating technique and sensitivity, order and creativity, so that architecture enhances daily life without imposing itself upon it.

At Arktelier, each project is an opportunity to build spaces that complement, that bring light and meaning, that engage with what already exists and open up new possibilities. An architecture that doesn't seek the limelight, but rather harmony; that draws on experience, yet renews itself with every gesture, and that strives to endure with intention and serenity.

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Published on: September 5, 2026
Cite:
metalocus, CAMILA DOYLET
"Hang gliding. Roof for a children's playground in Hernani by Arktelier" METALOCUS. Accessed
<https://www.metalocus.es/en/news/hang-gliding-roof-childrens-playground-hernani-arktelier> ISSN 1139-6415
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