This photograph shows a narrow deck that wraps around a home located at the top of a steep slope. A large window is located next to the deck. The siding on this home is brick (non-combustible). The deck is a fiber-plastic composite product. The vegetation on the slope isn’t well maintained, so it is likely that a surface fire on the slope would reach the deck, imposing a flaming exposure to the underside of the deck. A photograph taken from the deck to the vegetation is shown in the next slide.

If the vegetation ignites, a flaming exposure on the underside of the deck is likely. If the deck also ignites, the glass in the window next to the deck may break, depending on the extent and duration of the flaming exposure from the decking (and vegetation).