What should be employed when joists and beams contact bare concrete walls?

When joists and beams contact bare concrete walls, employing pressure-treated wood with a 12mm air space is crucial to prevent moisture-related issues. Pressure-treated wood is specifically designed to resist decay and insect damage, making it suitable for contact with concrete, where moisture can be an issue. This helps extend the lifespan of the wood and maintain the structural integrity of the building.

The 12mm air space allows for ventilation, which further reduces the potential for moisture buildup. This space helps to minimize the risk of mold and rot, which can occur if wood is in direct contact with concrete surfaces that retain moisture. Thus, using pressure-treated wood combined with an appropriate air gap is a best practice in construction for ensuring the durability and safety of structural components.