We have been approached to design an exclusive timber house in an unique setting in the mountains of Andorra. The aim of the developer is to build a series of industrialised, energy-efficient dwellings built with healthy materials.

The proposal consists of two pure volumes resting on a platform, a plinth that elevates them from the steeply sloping topography of the site. The two volumes are separated by a transition space which is the entrance from the exterior. They accommodate the day area and the night area, with a roof that opposes each other and opens up the visual space to the magnificent views of the surroundings. The day area consists of a double-height open-plan space with the kitchen, dining room and living room, with a large window that opens onto a terrace that dominates the views at sunrise. The night area consists of two spacious bedrooms with large openings focused on allowing the visual of the old village, and two bathrooms, one of them en suite in conjunction with a large dressing room.

The construction with wooden structure and facades, a material with a great insulating capacity, forms a box with a fully insulated envelope without thermal bridges, achieving very high standards of interior comfort due to the absence of damp in the construction.

The structure of walls and slabs of cross-laminated timber is covered on the outside by a significant amount of insulation. This fact and the dimensioning of the structure against fire allows us to leave the structure visible on the inside with the comfort and beauty that this entails. On the outside, the ventilated facades are made of wood with different finishes with a vertical quartering, and the ventilated roofs are also finished with local slate.

The passive mechanisms inherent by the choice of natural materials, the solar orientation, the continuous insulated envelope and the natural cross ventilation are combined with the active systems of renewable energy production, consisting of aerothermal energy and controlled double-flow mechanical ventilation, resulting in a space with high indoor air quality and a near-zero CO2 footprint.