The roof acts as a big leaf that protects from the hot sun all the enclosed spaces of the house as the in-between open spaces, truly the most important ones. These in-between open spaces represent the essence of the design. They are the social areas, where the owner of the house and his guests spend most of their time.

The very generous heights of these spaces, which varies from 3 to 9 meters, allow the SE trade winds from the sea to pass perfectly longitudinally trough the building, providing natural ventilation and passive cooling both to the enclosed and open spaces. We see it as low-tech ecoeficiency, where it has the greatest impact, the concept of the architectural design. Our practice, luckily in agreement whit our client, understand the idea of a tropical beach house as a mean to enhance the interaction between man and nature, trying whenever possible not to separate them completely.

There are no corridors and inside and outside are almost fused. Many sliding doors, most glazed, open up the enclosed spaces and let the sea breeze in. The landscape is everywhere on the ground floor, and the curvy swimming pool snakes into the house. When it passes below the formal dining room, it turns into a pond with aquatic plants and fishes, reaching the rear “verandah”. This veranda is a resting space with five Brazil´s Indians’ style hammocks. We call this space “Brazilian lounge”.

The roof structure is made of laminated wood (eucalyptus, an Australian species planted in Brazil to serve as a fast renewable material source), capable of crossing big spans (20 meters is the biggest here) with delicacy and warm aesthetics. The roof is covered in small wood tiles (pinus taeda – also a fast growing renewable material source), that easily adapt to the complexes surfaces of it. It also collects rainwater via the central steel column to be reused in gardening and flushing toilets.

All surfaces finishes, except for glass and pre-oxidized copper are natural: Grey tiles of stone from the site, bamboo meshes, local wood from management forests, earthy cement flooring and wood reused from old electricity posts. The use of all these natural materials, the transparency of the glass, the neutrality of the pre-oxidized copper relating to the prevailing green of the designed and natural landscape along with the organic composition of the house and rich diversity of textures and rhythms created a very desirable reality: The sensation of belonging to the site, in harmony with the exuberant Brazilian nature.

Leaf House in Brazil – Building Information

Location: Angra dos Reis, Rio de Janeiro, Brasil
Design date: 2006/2007
Completion date: 2008
Site area: 40.000,00 sqm
Built area: 800,00 sqm

Project:
Mareines + Patalano Arquitetura

Architects:
Ivo Mareines, Rafael Patalano, Paula Costa, Flávia Lima, Rafael Pretti

Construction: Laer Engenharia
Lighting design: Airton Pimenta
Landscape design: Marita Adania
Interior Design: Mareines + Patalano Arquitetura

Consultants:
Mechanical, electrical and plumbing: Laer engenharia
Steel structure: Abilitá projetos
Laminated wood structure: Andreas Hösch

Sources:
Laminated wood: Esmara estruturas de madeira
Windows: Eurocentro
Copper: NDidini

Furniture:
Mareines + Patalano Arquitetura, Llussá marcenaria, Carlos Mota, Tora Brasil, Pedro Useche, Magis-Chair one

Photographs: Leonardo Finotti

Leaf House in Brazil images / Information from Mareines + Patalano Arquitetura

Location: Angra dos Reis, Rio de Janeiro, Brasil

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