California Residential Inspector Practice Exam

When wood columns are exposed to weather, what is required to support them if covered by a moisture barrier?

1. Pressure-treated wood

2. Sealed wood

3. Composite wood

4. Undercut wood

The correct answer is: Pressure-treated wood

When wood columns are exposed to weather, using pressure-treated wood as a support when covered by a moisture barrier is essential for durability and longevity. Pressure-treated wood is specifically treated to resist rot, decay, and insect damage, which is crucial when the wood is likely to come into contact with moisture. The pressure treatment involves infusing the wood with chemicals that protect it against the elements, making it ideal for outdoor conditions. When covered by a moisture barrier, moisture can still find its way to the wood, posing a risk. Therefore, pressure-treated wood can withstand any moisture that might penetrate the barrier, ensuring that the structural integrity of the columns is maintained over time. Other types of wood, such as sealed or composite wood, may not provide the same level of protection against moisture and decay as pressure-treated wood does. Sealed wood, while it provides a barrier, may not have the same longevity as pressure-treated when exposed to severe weather conditions. Composite wood offers other advantages, such as being made from recycled materials, but may not be as strong or resistant to moisture penetration. Undercut wood is typically not a recognized category in terms of weather resistance. Thus, for columns that need to support weight in a weather-exposed environment while being covered by a