This summer house is situated only a few meters from the sea, on the north coast of the State of São Paulo, a place with exuberant vegetation and hot humid climate. We began the project with the idea of a big shelter, a “shell”, under which the actual living spaces would be located, protected from the intense sun and the frequent rains, however without blocking the permanent natural cross ventilation. This roof at a height of six meters, with a surface of eighteen by eight meters, was built using a pre-fabricated timber structure with galvanized steel joints. The lateral and top faces are made of steelcladding with EPS filling. On the two large facades of the house, opening generously to the scenery, panels of glass fiber mosquito screens with PVC coating were installed, pivoting or sliding, with the intention of creating anexternal membrane, capable of keeping the insects out, without creating an obstacle for the ocean view and wind. The whole structure is elevated 75cm above ground level, supported by concrete pillars cast on site. All other components used in the construction are pre-fabricated and were simplymounted in place on the construction site. The adopted constructive system, besides reducing assembly time and errors, assured a dry construction site, with little generation of waste and low environmental impact.