Use non-combustible patio furniture and covers. If possible, build the structure to the ground so that there is no space underneath. Enclose eaves and overhangs. Like porches and balconies, eaves trap the heat rising along the exterior siding. Enclose all eaves to reduce the hazard.
Cover house vents with wire mesh.
Any attic vent, soffit vent, louver or other opening can allow embers and flaming debris to enter a home and ignite it. If you're designing louvers, place them in the vertical wall rather than the soffit of the overhang. Install spark arrestors in chimneys and stovepipes. Chimneys create a hazard when embers escape through the top. To prevent this, install spark arrestors on all chimneys, stovepipes and vents for fuel-burning heaters.