Retrofitting Old Attic & Gable Vents for Ember Resistance

You don't need a brand-new roof to defend your home against wind-blown embers. For a lot of San Diego homes, the single most effective fire upgrade is also one of the simplest: replacing the old attic and gable vents with ember-resistant ones. Here's what that retrofit actually involves.

Why older vents need replacing

Homes built or last re-roofed decades ago usually have vents that were never meant to face a wildfire. Plain plastic vents can soften, warp, and melt under radiant heat, opening a straight path into the attic. Coarse wire screens — the kind sized to keep out birds and rodents — let small embers pass right through. Either way, the most common path a fire takes into a home is left wide open.

What an attic and gable vent retrofit looks like

Replacing vents is a focused job, not a full reroof. In practice it means:

• Attic vent replacement — swapping the roof and eave vents for ember-resistant models tested to the ASTM E2886 standard.
• Gable vent replacement — the large vents in the gable-end walls are one of the biggest single openings on a house, so fire-rated replacements here matter a lot.
• Soffit / eave intake — the low intake vents that feed the attic get the same treatment, since they're the most exposed to embers blowing in low.

Throughout, we keep your intake and exhaust balanced so the new vents protect the roof without choking off the airflow your attic needs (more on that in our roof venting guide).

Can you do it without reroofing?

Yes. A vent retrofit can be done on its own, on most roofs, in a single visit — you don't have to wait until you're ready to replace the whole roof. That said, if your roof is already near the end of its life, folding the vent upgrade into a roof replacement lets you harden the entire assembly at once, and the access is already there.

A retrofit your insurer should care about

Upgrading your vents isn't just about safety. Ember-resistant vents are a recognized wildfire-mitigation measure under California's "Safer from Wildfires" rules, so the retrofit is one of the documentable steps that can help keep your home insurable. We cover that in detail in our guide to roofing and vents for home insurance — and we'll give you documentation of the work for your agent.

To explore ember-resistant vent options for your home, see our ember-resistant vents page, then request a free inspection or give us a call. We're a family-owned San Diego roofer, licensed and insured (CSLB #247618), serving the county since 1967.