Zone 0 Stops an Ember From Catching. Here's What You Need for the One That Gets Through Anyway
Every week I talk to a homeowner who's convinced they only need to pick one lane — either do the defensible space work around the house, or buy the equipment to fight an ember if it gets close. After 42 years in manufacturing, the thing that's stuck with me most is that no serious system relies on a single point of failure. You don't build one. You build layers, and you plan for the layer in front of it to fail sometimes. Wildfire defense at a home in West Hills works the same way, and after watching the 2018 Woolsey Fire burn through the hills near my own house, that's exactly how I've built Ace Fire Defense's approach — and how I'd build yours.
Two Different Jobs, Not Competing Priorities
California's Zone 0 rule — the "ember-resistant zone" covering roughly the first five feet around your house — is still a live rulemaking process, not settled law. The Board of Forestry adopted a draft version in August 2026 and then withdrew it from state review in September, so it isn't a statewide mandate as of this writing. Several local jurisdictions already require something close to it anyway, and the underlying idea isn't going anywhere regardless of the paperwork, so the smart move is to treat the draft as the standard and not wait on Sacramento to tell you it's official. But even a textbook-clean Zone 0 is doing one job: lowering the odds that an ember catches in the first place. It's not designed to do the other job — stopping a fire that's already caught. That's a different tool, and conflating the two is how people end up with half a plan.
What Zone 0 Actually Does
I wrote a full checklist on this a few weeks back, so I won't re-run the whole thing here, but the short version: noncombustible materials in the first foot or two against your walls, no stored mulch or firewood touching the house, clear roofs and gutters, limbed-up trees, and potted plants kept small and movable. All of it is aimed at removing the fuel an ember needs to turn into a flame on your property. It's prevention, and it's some of the cheapest, highest-leverage work a homeowner can do — most of it costs nothing but a Saturday morning.
What Equipment Does That Zone 0 Can't
Here's the gap defensible space doesn't close: embers don't respect property lines, and they don't stop coming just because your five feet are clean. A wind-driven ember can travel over a mile and land somewhere your Zone 0 work didn't anticipate — a gap under a gate, a neighbor's woodpile that blows onto your side, a patio cushion you didn't think to move. Defensible space reduces how often that ignition happens. It does nothing for you in the minute after it already has. That minute is what equipment is for.
This is where a hydrant kit — the same basic setup CERT training introduced me to after Woolsey — earns its place in the plan:
- A hydrant wrench to open the hydrant on your block, where local rules allow it, instead of standing there with no way to access the water that's already right in front of you.
- A gated WYE valve that taps a hydrant's 2.5" outlet without disturbing the 5" outlet firefighting apparatus needs, so you're not creating a problem for the people who show up next.
- A fire hose rated for real pressure, not a garden hose that can't reach past your front lawn.
- An adjustable nozzle so you can switch between a fog pattern for knocking down embers and a stream for reach, instead of one fixed spray that's wrong for half the situations you'll actually face.
And for the smaller moment — a stray ember that's caught on a doormat or a cushion before it's anything close to a structure fire — a fire blanket does the same job a hydrant kit is overkill for: fast, no water required, reusable.
What You Need to Know
- Zone 0 and equipment solve different problems. One lowers your odds of ignition. The other gives you a way to respond if ignition happens anyway. A complete plan has both, not one or the other.
- Do the free Zone 0 work regardless of its legal status. Clearing roofs, gutters, and combustible material against your house costs nothing and doesn't depend on a regulation being finalized.
- Check your local rules before using a hydrant. Whether homeowners can legally access a hydrant on their block varies by city and water utility — confirm with your fire department or water provider before you rely on it.
- Practice before you need it. Knowing where the wrench goes and how to open a gated valve is not something you want to be figuring out for the first time with smoke in the air.
- None of this replaces evacuation. Equipment and defensible space both buy you margin — they are not a reason to stay and fight a fire that's telling you to leave.
Defensible space and equipment aren't rival strategies competing for your budget. They're two stages of the same plan, and most homeowners I talk to have only built one of them. If your five feet are already clean, the next reasonable step is making sure you've got something on hand for the ember that gets past it anyway.
Sherwin Ross is the founder of Ace Fire Defense, based in West Hills, CA. After the 2018 Woolsey Fire, he became CERT-trained and started building wildfire defense equipment for homeowners.