What does the term 'interlayment' refer to in roofing?

The term 'interlayment' in roofing specifically refers to a layer placed between courses of wood shakes. This layer serves multiple purposes, including acting as a barrier that helps prevent wind-driven rain from penetrating the roof while allowing for moisture to escape. It enhances the durability and performance of wood shake roofing systems by reducing the likelihood of water infiltration and protecting the underlying structure.

In this context, it’s important to understand the distinction between interlayment and other roofing terms. While a roof covering material refers to the outermost layer protecting the roof, interlayment is specifically about the additional layer beneath the actual roofing materials. Similarly, structural support elements pertain to the framework supporting the entire roofing system, and insulation materials are designed for thermal resistance rather than serving as a layer between other roofing components. Thus, the correct understanding of interlayment highlights its unique role in maintaining the integrity and functionality of wood shake roofs.