When remodeling or designing your ignition-resistant structure, remember that the primary goals are fuel and exposure reduction.  To accomplish this, use construction materials that are fire-resistive or non-combustible whenever possible.

For roof construction, consider using metal, cement or slate products, or class-A asphalt shingles.  Constructing a fire-resistive sub-roof can add protection as well.  Never use wood shingles because this greatly increases the risk of a fire ember and igniting the roof.

The exterior of the house should be constructed of fire resistive materials such as stucco or masonry.  These materials are much more heat-resistive than vinyl, which can soften and melt when exposed to fire.

Consider both the size and material in windows.  Smaller windows let less radiant heat into the house than larger windows.  Double pane glass and tempered glass are more effective at reflecting heat than single pane glass windows are.

To prevent sparks from entering your home through vents, cover exterior attic vents with wire mesh no larger than 1/8 of an inch.  Fire embers can collect in wind eddies under the eaves of your house, which can easily set your house on fire.  Be sure to box in eaves, but provide adequate ventilation to prevent condensation in the attic.

The underside of decks attached to the house can provide a place for dry grass or sparks to ignite the house on fire.  Be sure to skirt wood decks with non-flammable siding backed by wire screen.  This will not only prevent a potential fire ignition source, but it will also keep animals out from under the deck.