Abstract: A multichamber timber drying kiln in which different conditions are maintained in each chamber and methods of drying timber using such a kiln. In one aspect timber is rapidly heated within a first chamber (2; 202; 207) and then transferred to a further chamber (3; 203; 208) for further drying. Timber may be transferred from the first chamber (2; 202; 207) when the moisture content of the timber approaches the fibre saturation point A preheating chamber (1; 201; 206) may be provided to preheat the timber before passing to the first chamber (2; 202; 207). A conditioning chamber (4; 204; 209) may be provided after the further chamber (3; 203; 208) to condition the timber. Energy transfer means (49-53; 54-58) may be provided to transfer energy between chambers.