This was one of the most difficult postwar problems which Le Corbusier has had to solve. The rulings concerning the ground were contradictory, the programme was complicated, and the budget was unavoidably limited by the outrageous cost of private building. Le Corbusier decided to use the commonest and crudest materials-bricks, tiles, and vaults formed with tiles as permanent shuttering (Catalan vaults), the roofs covered with grass. The Modulor was used to determine the principal dimensions, spans of 7 ft 6 in. and 12 ft and a height to the soffit of the vault carrying lintels of 7 ft 6 in. The floors and the Catalan vaults have an ordinary tile finish, the interior spine wall of unplastered brick runs right through the house.
The exterior walls are unplastered on the outside, and on the inside plastered to avoid condensation. The glass wall has been much improved due to earlier research. The drainage is concentrated in two channels at the foot of the walls and in the groins of the vaults. These channels contain the hot and cold water, drainage, the telephone and the electricity. The electrical appliances are fed from contact points distributed above the skirting-boards (there are no electrical services in the ceilings).
The kitchen is incorporated in the living area and not completely separate as formerly.
The unavoidably small portion of land has been treated as a walled-garden.
The aspect of the sun dominated the lay-out of the plans and sections.
The horizontal bearers are great lintels of rough concrete, distributing the weight of the vault over the irregular openings.