When a client approached Lisbon-based architectural practice Studio 3A for a small residential project in the seaside village of Comporta, the architects knew that a major challenge would be keeping the house naturally cool during the oppressively hot summers. In keeping with their commitment to sustainable architecture, the architects used passive solar strategies and efficient insulation to mitigate solar heat gain. The firm also teamed up with design studio Mima Housing to prefabricate the buildings, named Cabanas in Comporta, which were topped with solar panels and sheathed in charred timber for a durable and maintenance-free finish.

prefab charred timber black cabin surrounded by trees
prefab charred timber black cabin surrounded by trees

The architecture of Cabanas in Comporta follows a modular design of three types: the “intimate module” that houses the bedroom and bathroom; the “social module” for the living spaces with room for an outdoor pool; and the “service module” that also serves as storage for items such as the client’s car collection. Together with Mima Housing, Studio 3A prefabricated the modular buildings with oriented strand board sandwich panels and wooden joints. The facades are clad in timber charred black using the Japanese technique of Shou Sugi Ban.

Related: The elegant MIMA Light prefab home ‘floats’ on thin air

prefab charred timber black cabin surrounded by trees
prefab charred timber black cabin surrounded by trees

“As local connoisseurs, we based our construction method on the traditional fishermen huts/cabanas as an inspiration for our project,” explain the architects. These huts have been built in this area for years and are very functional and quick to build which were another important point of our brief. With this construction type we had a couple of challenges to face which was the hot-summer Mediterranean climate and the mosquitos which are well known to bug you in the area. We implemented various sustainable strategies to reduce the heat sensation such as the calculated overhangs in front of the main windows, low emissivity window panes and a tensioned solar shading system in between the cabana modules.”

prefab charred timber black cabin surrounded by trees
prefab charred timber black cabin surrounded by trees

Heat gain is further controlled with a double blind system installed in both the interior and exterior. The external blind also zips down to protect the home from mosquito invasions. Strategic placement of the buildings optimizes solar orientation and access to cooling breezes. Dark cement flooring is used to take advantage of thermal mass, while photovoltaic panels and heat pumps help heat the buildings in winter.

+ Studio 3A

Images by Nelson Garrido

prefab charred timber black cabin surrounded by trees