What are the main factors that influence the choice of a wood preservative?

The main factors that influence the choice of a wood preservative are the type of wood being treated, the intended use of the treated wood, the environmental conditions to which the wood will be exposed, and the desired level of protection. Different wood species have varying degrees of natural resistance to decay and insects, which can influence the type and concentration of preservative needed. The intended use of the wood, such as for structural members or decking, will determine the required level of protection and the acceptability of certain preservatives. Environmental conditions, such as exposure to moisture, sunlight, or soil contact, will affect the rate of decay and insect attack, influencing the choice of a preservative that is effective in those conditions. Finally, the desired level of protection, which may be based on code requirements or owner preferences, will dictate the type and amount of preservative to be used.