Twelve common timbers of Pakistan have been tested for their resistance against the attack of Coptotermes heimi Wasm., a most destructive and common termite. Based on the longevity of workers and soldiers released on saw dusts of these timbers. Cedrus deodara and Tectona grandis proved most resistant while Salmalia malabarica, Abies pindrow and Picea smithiana were the most susceptible timbers.