How do drained cavities affect the life of exterior finishes on wood surfaces?

Drained cavities significantly impact the longevity of exterior finishes on wood surfaces by increasing their life. When wood surfaces are properly drained, moisture that might otherwise accumulate is effectively reduced. This is crucial because trapped moisture can lead to problems such as wood rot, mildew, and degradation of the finish itself.

With proper drainage, any water that may get onto the wood surfaces can escape quickly, allowing the finishes to dry more thoroughly and maintaining their integrity over time. This prevents the finishes from peeling, blistering, or deteriorating prematurely, ultimately extending the life of the protective coatings applied to the wood. Therefore, ensuring that cavities are well-drained creates an environment that is less conducive to moisture retention, effectively contributing to the durability and lifespan of the exterior finishes.