Automated Exterior Sprinklers
That Protect Before You Leave
We install sprinkler systems that activate before fire reaches your property. No one needs to be home. Basic systems or custom setups for Bay Area homes.
In short: Exterior wildfire sprinklers are one layer of a complete wildfire defense. They drench your roof, eaves, and perimeter before fire arrives to prevent ember ignition. Combined with defensible space, home hardening, and dual detection, they dramatically increase home survivability. Sprinklers alone are not enough.
What Is an Exterior Wildfire Sprinkler System?
An exterior wildfire sprinkler system is an automated fire defense system installed on the outside of a home to protect it from wildfire. Unlike interior fire sprinklers that activate after fire enters a building, exterior sprinklers pre-wet the roof, eaves, siding, decks, and surrounding vegetation before fire arrives - preventing ember ignition on contact.
These systems are designed specifically for homes in California's Wildland-Urban Interface (WUI) and fire hazard severity zones. They activate automatically using dual detection (satellite monitoring + on-property cameras) - no one needs to be home.
Exterior Sprinklers vs. Other Wildfire Protection Methods
| Feature | FireRoofs System | DIY Sprinklers | Garden Hose | Private Fire Service |
|---|---|---|---|---|
| Activates automatically | ✅ Yes | ❌ Manual | ❌ Manual | ❌ On-call |
| Works when evacuated | ✅ Yes | ❌ No | ❌ No | ⚠️ Maybe |
| Roof & eave coverage | ✅ Full | ⚠️ Partial | ❌ No | ⚠️ Varies |
| Dual detection | ✅ Satellite + camera | ❌ None | ❌ None | ❌ None |
| Class A foam option | ✅ Yes | ❌ No | ❌ No | ✅ Some |
| Licensed installation | ✅ CA C-16 | ❌ No | ❌ N/A | ✅ Yes |
| Annual cost | $–$$ | $ | Free | $$$$ |
| Proven wildfire record | ✅ Yes | ⚠️ Limited | ❌ No | ⚠️ Varies |
Interior Fire Sprinklers Protect the Building.
Exterior Sprinklers Protect Your Home.
Most residential sprinkler systems are designed for interior fires. They activate after flames are already inside. That approach does nothing when wildfire rolls through a neighborhood at 2 AM and your family has already evacuated.
Exterior sprinkler systems work differently. They drench the roof, eaves, siding, decks, and vegetation before fire arrives. The goal is not suppression. The goal is keeping every exterior surface wet enough that embers can't catch.
FireRoofs builds automated exterior sprinkler systems specifically for homes in California's wildland-urban interface. Every system is custom-designed around the property's unique fire exposure: slope, prevailing winds, vegetation density, and structure layout.
In a wildfire and after a wildfire, the homes that make it through are the ones with wet exterior surfaces when embers arrive. That's what an exterior sprinkler system delivers.
How Automated Exterior Sprinklers Defend Your Property
Detect
Dual wildfire detection monitors threats at two levels. Regional satellite wildfire monitoring tracks fire activity across a 5-mile radius. On-property cameras with intelligent fire detection watch the immediate surroundings. Both feed into the automated threat protocol.
Alert
When a threat is confirmed, the system escalates through three response levels. You get real-time notifications through the FireRoofs app. The system does not wait for you to press a button. It moves.
Defend
Exterior sprinkler zones activate in sequence based on threat direction. Roof sprinklers extend coverage past the roofline. Eave sprinklers protect the most vulnerable ignition points. Perimeter zones flood defensible space with continuous coverage. Optional Class A foam multiplies suppression coverage. Foam is 100% biodegradable, non-toxic to plants, pets, and wildlife, and rinses off through the sprinklers.
What's Inside an Exterior Sprinkler System from FireRoofs
Exterior Sprinklers Are Not a Magic Bullet
We install these systems for a living, and we will be the first to tell you: roof sprinklers alone do not make a home fireproof. They are one layer in a multi-layer defense. When homeowners combine proper defensible space, home hardening, and an automated exterior sprinkler system with dual detection, Class A foam, adequate water supply, backup power, and a smart controller, the result is a near-bulletproof system. But skipping the basics and relying on sprinklers alone leaves real gaps.
What Every Homeowner Should Do First
Clear dead vegetation in the 30 to 100 foot zone
Remove dead trees, dry brush, and accumulated debris in the extended defensible space zone around your property. This reduces the fuel load that feeds an approaching wildfire.
Maintain a noncombustible zone within 5 feet of the house
No dead grasses, dry leaves, wood piles, firewood stacks, or combustible furniture within 5 feet of any structure. This is California Zone 0 and it is the most critical buffer.
Screen all vents with 1/8-inch mesh or finer
Attic vents, soffit vents, foundation vents, and gable vents are ember entry points. Replacing them with 1/8-inch metal mesh blocks embers from entering the structure.
Install a Class A roof and fire-resistant siding
Class A roofing materials (concrete tile, metal, asphalt composite) and ignition-resistant siding dramatically reduce the chance of structure ignition from radiant heat and embers.
Upgrade to dual-pane windows
Single-pane glass can shatter from radiant heat, allowing embers into the home. Dual-pane or tempered glass windows withstand significantly more heat exposure.
Clean roofs and gutters regularly
Leaf litter and pine needles in gutters and on roof valleys are ignition points. Regular cleaning removes the fuel embers are looking for.
When You Combine Everything, Survivability Goes Up Dramatically
Homeowners who clear their defensible space, harden their home with fire-resistant materials, and add automated roof, wall, and perimeter sprinklers with dual detection are in a fundamentally stronger position when wildfire reaches their neighborhood. We see this across our 32 service area communities in the Bay Area. The homes that do everything are the ones that survive.
FireRoofs handles the full scope: defensible space management, home hardening upgrades, exterior sprinkler system design and installation, and documentation of every mitigation action for your insurance carrier. That documentation is what helps homeowners qualify for premium discounts under California Regulation 2644.9, or get off the FAIR Plan entirely.
Three Levels of Exterior Sprinkler Protection
Keystone
Essential Roof Defense
- Roof sprinklers with extended coverage past the roofline
- Commercial-grade copper piping throughout
- Smart controller with FireRoofs app connection
- Manual activation from your phone, anywhere
- System automation via regional satellite wildfire monitoring
- Automated pre-wetting triggered by satellite detection with homeowner cancel window
Guardian
Full Perimeter Defense with Dual Wildfire Detection
Everything in Keystone, plus:
- Eave sprinklers protecting Zone Zero, walls, and windows from radiant heat
- Cameras with intelligent fire detection and sensors mounted on your home
- Dual wildfire detection: regional satellite monitoring combined with on-property camera detection
- Three-level automated threat activation with homeowner cancel window
Fortress
Maximum Protection with Class A Foam
Everything in Guardian, plus:
- Class A foam injection system for roof and eave sprinklers during highest threat activation
- Foam clings to surfaces, holds moisture longer than water alone, and creates a fire-resistant barrier
- Same formulation used by wildland fire agencies
- 100% biodegradable, non-toxic to plants, pets, and wildlife. Rinses off through the sprinklers after the event
Designed for Homes in California's Wildfire Zones
FireRoofs exterior sprinkler systems are built for homeowners in the wildland-urban interface who face real fire exposure and can't get adequate insurance coverage.
If your home is in a Very High Fire Hazard Severity Zone, or you've been dropped by your carrier and pushed to the FAIR Plan, an automated exterior sprinkler system is one of the strongest risk-reduction measures available. Some insurance carriers recognize active fire defense systems when evaluating coverage.
While other companies expand coast to coast, we went deeper into the Bay Area's fire corridors: Los Gatos, Saratoga, Woodside, Portola Valley, Los Altos Hills, Cupertino, Scotts Valley, and more across the Bay Area and Santa Cruz Mountains. 50+ years of local construction and irrigation expertise. Every system designed for the specific terrain, installed by a licensed California General Contractor.
What Installation Looks Like
Every system starts with a free on-site evaluation: water pressure testing, roof and eave inspection, Zone Zero walkthrough, and a full perimeter assessment. The evaluation takes 45 to 60 minutes. You'll have a proposal within one to three business days.
Installation timelines are property-specific. Every system is commissioned and tested before handoff. The entire system is exterior-mounted with copper piping throughout. No roof penetrations. No interior wall work.
Sprinkler Systems & App Control
Roof sprinklers, perimeter nozzles, eave coverage, and the FireRoofs mobile app that puts system control in your pocket.
Common Questions About Exterior Sprinkler Systems
How are exterior sprinkler systems different from interior fire sprinklers?
Interior sprinklers activate after fire is inside the structure. Exterior sprinkler systems drench the roof, eaves, and perimeter before fire arrives, keeping surfaces wet so embers and radiant heat can't start a fire.
Do I need to be home for the system to work?
No. The system activates automatically through dual wildfire detection. Satellite monitoring and on-property cameras detect threats and trigger the appropriate response level without anyone pressing a button.
What happens if I lose power during a wildfire?
The system relies on the homeowner's backup power source, typically a generator or Tesla Powerwall. We design every system with power continuity in mind during the evaluation.
How much water does an exterior sprinkler system use?
Water consumption depends on the size of your property and the number of zones in your system. Systems include automatic water source switchover between municipal supply, wells, tanks, or pools to maintain pressure and supply.
Can an exterior sprinkler system help with homeowners insurance?
Some insurance carriers recognize active fire defense systems when evaluating wildfire coverage eligibility. A professionally installed and documented exterior sprinkler system can strengthen a homeowner's position when applying for private coverage or supplementing FAIR Plan limits. Results vary by carrier and property.
Ask HydroIQ - Free AI Wildfire Assistant
HydroIQ is a free AI wildfire assistant that knows California wildfire law, insurance rules, local ordinances, and the science behind why homes burn. It covers communities across all nine Bay Area counties. No login, no cost.
Installing an exterior sprinkler system is one of the most tangible steps a homeowner can take toward improving their wildfire insurability. Under California's Safer from Wildfires regulation, admitted carriers are required to factor documented mitigation into their rate calculations. A professionally installed and commissioned sprinkler system generates the kind of verifiable, third-party documentation that underwriters look for when evaluating risk. FireRoofs provides that documentation with every system, formatted specifically for carrier submission.
Wildfire Mitigation Credits and Documentation
California Insurance Discounts Guide
Safer from Wildfires regulation, CDI mitigation categories, FAIR Plan context, and what underwriters evaluate.
Read the guideSample Evidence Packet (PDF)
See what a carrier-ready evidence packet looks like. Includes system specs, test logs, CDI alignment matrix, and more.
Download sampleReviewed by Shawn Gardner and Walt Mullins
Co-founders of FireRoofs with over 50 years of combined experience in construction, irrigation, and wildfire defense across the San Francisco Bay Area. Licensed California General Contractor. Learn more about us
Sources and References
Find Out What Your Home Needs
Every property is different. Book a free on-site evaluation and we'll design an exterior sprinkler system around your specific fire exposure.