An attached deck can collect embers, shelter stored combustible items and connect directly to a home’s siding. Those are different ignition pathways, so replacing the walking surface without examining the space beneath or the wall junction may leave important problems.
This page owns a deck and contractor priority record. For home-wide wildfire readiness use the wildfire preparedness plan. For a combustible fence attached to the deck or wall use the fence connection guide.
Separate three deck exposure paths
| Exposure | Visible clue from a safe position | Professional question |
|---|---|---|
| Ember landing on deck | Dead leaves between boards, combustible mat or furniture | Which surface assembly is approved for this house and wildfire zone? |
| Ignition beneath deck | Storage, debris and vegetation beneath structure | How should the underside and ground be maintained without blocking airflow or drainage? |
| Fire spread at wall connection | Deck meets combustible siding or uncertain flashing | Which code-compliant joint, flashing and materials are needed? |
| Downslope exposure | Deck extends over a vegetated hillside | Does a qualified site assessment change the scope or defensible-space plan? |
CAL FIRE’s current home-hardening guidance identifies combustible items under decks, vulnerable board gaps and deck-to-wall intersections. None of those observations establishes the strength or stability of the existing framing.
Separate safe housekeeping from construction
In ordinary safe weather, move only portable items you can lift without entering a hazardous void: stacked wood, outdoor cushions, doormats, dry vegetation and flammable clutter, consistent with property rules. Do not store gas cylinders or fuel where heat, ignition, leakage or ventilation is a concern.
Replacement boards, ignition-resistant assemblies, under-deck enclosures and exterior flashing require building-code and manufacturer review. An improvised screen may block necessary ventilation or trap debris and moisture. A deck over a slope or with visible deterioration merits a qualified structural and fire-risk assessment.
Price comparable retrofit scopes
Ask for a written scope covering the deck surface, attachments, walls, egress, any stairs and handrails, drainage, permits, inspections and maintenance. A low-price quote for board replacement alone may not address the connection to the house. Preserve the contractor’s exact materials and product documents rather than accepting “fireproof” as a specification.
If wildfire conditions are active, stop exterior work. Smoke, flame, ember fall, evacuation orders and compromised stairs all outrank a contractor checklist.
Wildfire deck priority card
| Location or photo | Ember/fuel observation | Structural or permit uncertainty | Professional scope and date |
|---|---|---|---|
| Walking surface | |||
| Under-deck area | |||
| Deck-to-wall junction | |||
| Steps and exit path |
Next action: identify the first combustible or structural concern that requires a qualified inspection, and retain the evidence for the next safe maintenance visit.