You can use pressure treated wood in situations where the wood will have direct contact with anything that could supply moisture, particularly for structures in or near the ground.
Pressure treated lumber is specifically designed to resist rot and insect damage, which are common issues when wood is exposed to moisture sources over time. The treatment process forces chemical preservatives deep into the wood fibers, providing this enhanced protection.
Recommended Applications for Pressure Treated Wood
According to recommendations, pressure treated lumber is best used in situations where there is direct contact between the wood and anything that could supply moisture. This is the primary indicator for when this type of wood is necessary.
Based on this principle, specific applications where pressure treated wood is highly recommended include:
- Retaining Walls: These structures support landscaping and hold back soil. Since they are constantly in contact with damp earth, pressure treated wood is essential to prevent decay.
- Ground Contact: Any wooden posts or beams that come into direct contact with the ground or are buried underground require pressure treatment. This ensures the wood doesn't rot from constant exposure to soil moisture.
In essence, if your outdoor project involves wood touching the ground, soil, concrete, or other materials that retain moisture, using pressure treated lumber is the appropriate choice for longevity and structural integrity. For applications like decking surfaces, fence pickets, or railing where wood is primarily exposed to air and not in constant ground contact, the need for pressure treatment depends on local climate, code requirements, and desired lifespan, but it is especially critical for the parts making ground or moisture contact.
