Green walls and living façades contribute to sustainability but introduce combustible material onto building exteriors.. Green Walls and Fire Living walls and green façades introduce organic (combustible) material onto building exteriors. Fire Safety Considerations Seasonal variation — dead plant material in winter increases fire risk Irrigation failure — dried out plants become fire load Substrate combustibility — soil alternatives may be combustible Fire spread potential — vertical arrangement promotes upward fire spread Maintenance — regular maintenance required to manage fire risk Testing — no established UK fire test standard for green walls For green wall fire safety assessment, contact us.