Archive

jtB house

BLAF architecten. Leuven, Belgium

  • Name of work in English

    jtB house

  • Name of work in original language

    woning jtB

  • Prize year

    EUmies Awards 2024

  • Work Location

    Leuven, Belgium

  • Studio

    BLAF architecten

EUmies Awards 2024 Nominees

  • The volume stands alone in the landscape; meanwhile, the undeveloped land where its placed, remains as open as possible and retains its slightly sloping relief

    The volume stands alone in the landscape; meanwhile, the undeveloped land where its placed, remains as open as possible and retains its slightly sloping relief

    © Stijn Bollaert

  • The house, on the street side, blending into its built environment, in materiality and scale

    The house, on the street side, blending into its built environment, in materiality and scale

    © Stijn Bollaert

  • The wooden volume is removed from the brick envelope to form a 9 m high covered space and canopy. The openings in the brick volume frame the building

    The wooden volume is removed from the brick envelope to form a 9 m high covered space and canopy. The openings in the brick volume frame the building's views of the landscape and provide additional solar shading.

    © Stijn Bollaert

  • The free-standing selfbearing hexagonal brick wall is build first, and later the wooden construction inside as a seperate construction.

    The free-standing selfbearing hexagonal brick wall is build first, and later the wooden construction inside as a seperate construction.

    © BLAF architecten

  • In contrast to the front, the volume at the rear opens up to the south and thus, to the open landscape.

    In contrast to the front, the volume at the rear opens up to the south and thus, to the open landscape.

    © Stijn Bollaert

  • Siteplan

    Siteplan

  • Floorplan -1, +0, +1

    Floorplan -1, +0, +1

  • Cross section

    Cross section

  • Longitudinal section

    Longitudinal section

  • Wall composition

    Wall composition

  • Exploded view: brick and concrecte shell + wooden frame

    Exploded view: brick and concrecte shell + wooden frame

This project, a hexagonal brick sculpture, houses a wooden dwelling and music studio. It embodies BLAF's geometric and sustainable design principles, showcasing circular zero-energy construction. This small-scale research aims to revolutionize construction economics, reducing waste for sustainable large-scale architecture.

Authors

Bart Vanden Driessche, Lieven Nijs,

Collaborators

Others: Heron Engineers (Stability and EPB); Others: Legoclean (Structural work); Others: Willem-Vereycken BVBA (Timber frame); Others: Enerpro (Plumbing, heating and ventilation); Others: Exie (Techniques); Others: Ecobouw Craeghs (Lime hemp and clay plaster); Others: Stiel Atelier (Stairs)
  • Program

    Single house

  • Labels

    Infill · Family

  • Client

    Tine Carmeliet & Jasper Vanpaemel

  • Completion

    2022

Thanks to its compact hexagonal and equilateral footprint, the volume stands alone in the landscape; meanwhile, the undeveloped land where its placed, remains as open as possible and retains its slightly sloping relief. On the street side, the house blends into its built environment, in materiality and scale. A modest 2-storey red brick volume appears on the public side and forms the house. Descending down the sloping landscape next to the house leads to the music studio, located below the house. In contrast to the front, the volume at the rear opens up to the south and thus, to the open landscape. The wooden volume is removed from the brick envelope to form a 9 m high covered space and canopy. The openings in the brick volume frame the building's views of the landscape and provide additional solar shading.

We need to investigate other ways of building, we need architecture that is more compact and with less negative impact so that quality architecture remains affordable. BLAF uses a logical and artisanal way of thinking to investigate this goal. This strategy we follow has been based for years on "Trias" thinking, such as "Trias Energetica". Good compact buildings with low requirements can easily be provided with renewable energy and built with local or bio-based materials. Our strategy is based on sustainability, not only for the wishes or needs of customers, but also in the general interest. The hybrid way of building is providing new architectural responses to the rapidly changing climate in Belgium. The wall structure, form by a self-supporting BLAF Big Brick cladding on the outside, followed by a lightweight timber frame on the inside and cavity-free bio-based dry lime hemp infill (so it works as a whole) is an alternative to the traditional cavity wall. It is the most effective wall system we have explored. Daring to use bio-based materials that have not yet been regulated is not a problem, but a calculated risk, like the hemp lime in this case.

The heavily insulated cavity wall is no longer sustainable as a building system. That is why we have come up with an alternative hybrid exterior shell that makes reversible construction possible. First we build an exterior wall and then a lightweight timber frame on the inside, or vice versa. You can also break down the exterior shell or the interior structure, because each stands on its own, so they work independently. In this way, there are no connections between the inside and the outside, so there are no thermal bridges. The insulating material is hemplime, which is heavy, moisture-regulating, locally grown and produced with little energy, it also is degradable. Fortunately such healthy materials are becoming cheaper in this period of different crises. The magnesium board inside the wooden structure is finished with loam plaster.


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