When embers travel ahead of a wildfire, vulnerability is not limited to trees next to a wall. Combustible roof debris and openings into attic or crawlspace cavities can matter too. CAL FIRE home-hardening guidance addresses roof materials, gutters, vents and eaves as different parts of the house.
This guide is a contractor inspection brief, not a roof retrofit tutorial. The general wildfire home preparedness plan owns evacuation, smoke and transport. This page owns questions about the building envelope.
Four paths to inspect with qualified help
| Location | Why it matters | Question for a qualified contractor or fire authority |
|---|---|---|
| Roof surface and edges | Debris and vulnerable roofing components may allow ignition or ember entry | What materials and conditions are documented for this exact roof assembly? |
| Gutters and roof valleys | Leaves and needles can accumulate where embers may land | How will safe regular clearing and covers be maintained? |
| Attic and crawlspace vents | Openings can admit embers and windblown combustible material | Is the installed model State Fire Marshal-listed or otherwise approved locally for this position? |
| Eaves, soffits and joints | Gaps may expose combustible spaces and materials | What is the accepted code-compliant detail for these gaps and ventilation paths? |
Take photographs only from stable ground or safe, normally occupied areas. Stay off roof edges, wet ladders and unsafe attic spaces. Do not remove vent covers to “see inside” or perform electrical work during inspection.
A vent is also part of a ventilation system
CAL FIRE explains that many conventional vents can admit embers, and describes State Fire Marshal-listed flame- and ember-resistant products. It also cautions that modifying or covering vents can reduce airflow. Closing or screening a vent without checking required ventilation can cause building problems.
Before selecting a vent, ask for:
- The exact vent make, model and approval/listing evidence.
- Its installation location and intended roof/underfloor use.
- Whether the permitted design preserves required ventilation.
- A qualified installer’s written scope and any applicable permit or inspection.
- Maintenance instructions, including debris removal and inspection after storms.
Do not assume that an aftermarket fine mesh, a generic “fireproof” label, or one retailer’s review is enough. The correct choice is an exact product with a documented installation that a local authority accepts.
Roof and vent inspection is not the same as a deck inspection. A connected or overhanging deck has its own under-structure fuel and wall-junction risks; use the wildfire deck risk worksheet to request a specific contractor scope rather than relying on a roof-material quote.
Roof maintenance has two hazard contexts
Clearing leaves helps reduce combustible fuel near the roof, but roof and gutter condition can also affect rain runoff. If you have a downspout or overflow concern, use the ground-level rain-path record and coordinate both repair goals. A fire-hardening choice must not create standing water, drainage problems or a new roof penetration.
If wildfire weather or an evacuation warning is already active, stop inspection and follow the official order. No property retrofit outranks an immediate safety decision.
Roof-and-vent contractor worksheet
| Component | Ground-visible issue | Existing product evidence | Local rule / permit question | Contact and next inspection |
|---|---|---|---|---|
| Roof and edge | ||||
| Gutters and valleys | ||||
| Attic/crawlspace vents | ||||
| Eaves and soffits |
The next action is to ask the local fire/building authority or a qualified hardening contractor about one observed weakness, bringing the model/roof details you already know. Do not begin alterations based on this article alone.