The winter climatic conditions of much of Canada provide an ideal environment for freeze-drying. Attempts have been made to use these conditions for the drying of large waterlogged timbers. In the freeze-drying process, the wood is kept in a frozen state and the drying proceeds by sublimation. Focuses on the treatment of large timbers which present great difficulties when treated by the accepted methods. In experiments, the timbers were of several varieties of wood in various states of decomposition. All of the wood dried quickly and much of the water was removed. The technique appears to have the potential to treat large quantities of timber in an economic and simple way.