Principle Daniel Buren chose to cover one of every two glass panes of the Fondation with dyed filters. He used 13 different colours in the project: Blue, golden yellow, ping, dark red, turquoise, green, orange, red orange, dark green, salmon pink, bright red, azure blue and blue green. One in six panes is covered with 8.7cm wide white strips. These strips lie perpendicular to the ground. Key Figures The roof of the Fondation Louis Vuitton is composed of ten sails, formed of 3528 panes of glass. 1472 are covered with dyed filters, and 287 are covered with white strips. 4884 ORACAL 8300 coloured filters have been installed and 6.5km of ORACAL 631 strips. The filters were hung over 29 nights during five weeks. Between the 8th and the 16th operators were on site every night in order to hang the filters. Logistics In order to hang the strips, each operator was provided with a water vaporiser and soap in order to wet the filters, a felt covered squeegee to smooth down the film, and a cutter to cut each filter to the dimensions of the glass panes. Four 40m cherrypickers and one 90m cherrypicker were used to reach each sail of the Fondation’s roof, in order to hang the filters