This means consumption will shrink to the levels from 2003.
Saint Leon said the sector was going through a "complicated" situation which would not improve in 2009. Next year demand is seen declining by 20%.
Cement consumption in Spain totalled 40.4Mt from January to November, down 23% in annual terms.
Cement production, in turn, fell by 21.5% to 39.7Mt. Cement exports went up by 91.6% in the period, while imports dropped by 43.8%.
