"This was one of the most difficult postwar problems which Le Corbusier had to solve. The rules concerning the ground were contradictory, the programme was complicated, and the budget unavoidably limited. Le Corbusier decided to use the commonest and crudest materials—brick, 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."

— Hans Girsberger, ed. Le Corbusier 1910-60. p78.