Wildfire-Resilient Detailing, Joint Systems and Interfaces of Building Components

This technical guidance document provides detailed recommendations for improving wildfire resilience at the joints and interfaces of building components, with a focus on residential structures. It addresses vulnerabilities such as gaps at roof, wall, and floor joints that allow ember and debris accumulation, and offers specific construction and retrofit strategies to seal these areas. The resource includes discussion of fire-listed products, limitations of current fire test standards for joint systems, and maintenance challenges. Guidance is applicable to both retrofitting existing homes and new construction, with some relevance for commercial buildings.