Timber is treated with a preservative to improve the timber’s resistance to attack by wood destroying fungi and wood destroying insects. In other words, the timber’s durability is enhanced to a level which is suitable for the intended use. However, such “treatment” does not afford the timber protection against weathering. Both untreated timber and treated timber used externally should be protected from the affects of weathering by the application of a coating or oil. It is important to always wear dust mask and goggles when working with timber and DO NOT BURN treated pine. All Treated Pine products that are cut to size should be Re-Treated.