Modified wood is timber that has been treated to enhance its properties, making it more durable and resistant to environmental factors. This process often involves the use of heat, chemicals, or both, which alters the wood's structure at a molecular level. As a result, modified wood can withstand moisture, pests, and decay better than untreated wood, making it suitable for outdoor applications like decking and siding. Common types of modified wood include thermally modified wood and acetylated wood. These materials are increasingly popular in construction and furniture making due to their sustainability and reduced maintenance needs. By improving the longevity of wood products, modified wood contributes to more environmentally friendly building practices.