A housing needs program is previously established, adjusting it until an optimal solution is found in terms of distribution, orientations and relationship between the internal surface and volume and the surface of the enclosure.
To the conditioned part of the house an auxiliary open building is added continuing with the cover to two waters, the cornice height and the facade material. The resulting building is located in the flattest area of the plot looking for the ideal orientation, taking into account the views, sunlight levels and prevailing winds. At the same time its location and its shape contribute to the spatial organization of the farm. For all this, the volume is distorted slightly in plan in order to pick up opening to the south orientation. In the northern area a small esplanade is generated, which is understood as a work space that serves the auxiliary building and from which the glazed vestibule is accessed before entering the house. The vivideros spaces are arranged in open plan in fan to southwest-south-southeast. The solar control, in addition to the own flights of the cover, is solved with the own solar panels, with awnings and with a trellis, all of them fixed to a base formed by an exterior metallic structure.
For the roof and a good part of the vertical enclosures, a roof covering based on flat ceramic tiles is used (the constructions of the village are resolved with both curved ceramic tiles and flat tiles). This solution is considered optimal because it provides a continuous skin for most of the façade, generating an air chamber and, enveloping both the light framework areas of the conditioned part of the house and the concrete structure of the auxiliary building. The remaining façade panels are resolved with a ventilated wooden façade.
The new building does not exhaust, the planned buildability for the plot. Nor does it reach the maximum cornice height with respect to the land at each point of the façade perimeter. These decisions make the volumetry of the new piece relate well to the traditional, main and adjective buildings of the village. The building is presented as a compact volume, a continuous “bar”, slightly deformed, resolved with a gable roof.
An order was sought in the composition of the facades that refers to the simplicity and efficiency with which adjectival constructions were traditionally solved in rural areas. All this composition also responds to orientations of interior rooms to prioritize, views, sunlight, protection against the weather and direct relationship with the plot, using tools of architectural composition typical of a contemporary language that does not renounce to establish clear references to architecture popular.
From a technical point of view, the building is essentially defined by the achievement of a high efficiency envelope from an energy point of view. In addition to the construction of the envelope this premise also conditions the structure, the facilities and part of the finishes.
In the case of the closed spaces of the house, a foundation slab is projected. In this case the slab will be placed on extruded polystyrene insulation placed on a waterproofing slab placed on the sand bed that completes the gravel bedding.
The roof of the building, sloping to two waters, is solved with a flat ceramic tile fixed to the stripping that forms a ventilated air chamber in interior areas that are isolated and that is seen inside in the covered outdoor areas. In this case, the stripping to which the tile is fixed, perpendicular to the direction of the slope, is fixed directly to the roof rafters, while in the first one a second rafter is arranged, in the direction of the slope fixed to a board. base that serves as the boundary of the envelope of the heated space.
This base board is a panel of wood fiber that rests on another one of oriented shavings that braces the framework of rafters of the cover. This is completed on the outside with a steam regulating sheet. To these are fixed strips that collect a board of OSB that forms the inner plane of sealing. The provision of this new tracing allows to have enough space to have the necessary insulation thickness in this case.
Vertical enclosures and internal partition walls.
The vertical enclosure is shaped similarly to that of the roof in such a way that the continuity of the entire enclosure is guaranteed. The heat-treated wood paneling and the flat ceramic tile are fixed to a double slab forming a transventilated façade. Said tracing is fixed to the insulating panel and waterproof fiber wood that surrounds the OSB board that serves to brace the structural framework of wood. Between these uprights, the insulation is confined between the outer board and the interior of the OSB, which serves as an internal sealing plane.
For the conditioned area of the house, extruded polystyrene plates are used in the base and in the baseboards. For the light frameworks of roofing wood and the vertical enclosures, rock wool confined between boards will be used. The insulation of the enclosure is completed with an insulating panel of wood fiber on the outside.
Exterior carpentry, locksmith and glassa.
The exterior carpentry will be cedar wood treated exteriorly with breathable paint. Laminated plywood board shutters will be placed, according to the graphic documentation.
Glazing with high levels of thermal insulation and solar gain formed by triple glass and double insulating chamber of 18mm filled with 90% argon. The glasses used will be extra clear to favor the solar gain and the two of the ends will have a low emissive film on the inside. On the other hand, depending on its location, the exposed glass will be laminated in some cases.
Work: Casa Cachóns
Location: Teo. A Coruña. Spain
Authors: ARROKABE Arquitectos SLP (Óscar Andrés Quintela y Iván Andrés Quintela)
Collaborator: INOUS Enxeñería Global (Facilities), Mecanismo Ingeniería (Structures), Isaac Fudili Moreno (CCP Engineer – Collaborator in PHPP calculation)
Promoter: Irene Gómez Ibarlucea, Isaac Fudili Moreno
Construction Company: José Vázquez (Exterior and interior carpentry). Trabecon S.L. (Construction company)
Technical architect: Francisco Fernández Novas
Area: 203 m2
Photography: ARROKABE Arquitectos SLP | Luis Díaz Díaz