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. Ask your fire department for exact specifications. If you're building a chimney, use non-combustible materials and make sure the top of the chimney is at least two feet higher than any obstruction within 10 feet of the chimney. Keep the chimney clean. Avoid designs that include wooden decks and patios.