What is the recommended treatment for sill material?

The recommended treatment for sill material is to ensure it is either treated or naturally decay-resistant. This is essential because the sill, which is the horizontal member at the bottom of a window or door frame, is often vulnerable to moisture and environmental factors. If the sill material is not adequately treated, it can lead to weakening of the structure due to decay or rot over time.

Using treated wood or materials that are naturally resistant to decay, such as certain types of cedar or redwood, provides longevity and durability to the sill, helping to maintain the integrity and safety of the building. This is particularly important in areas exposed to high humidity or potential water intrusion. Therefore, opting for materials that resist decay effectively safeguards against future repairs and structural issues related to moisture damage.