There are several timbers that are naturally resistant to termites. These include cedar, teak, mahogany, and balsa wood. Cedar is perhaps the most well-known of these woods, and it has been used for centuries in outdoor construction projects due to its resistance to rot and insect damage. Teak is another popular choice for outdoor furniture and structures, as it is also very durable and resistant to both rot and insects. Mahogany is a less common option but it is also a very hardy wood that is resistant to both rot and insects. Balsa wood is the lightest of the woods on this list, making it ideal for use in construction projects where weight is a factor. It is also relatively inexpensive compared to other hardwoods.