Built To Endure • Part 05

July 1, 2025

A wildfire-resilient home is more than just well-built - it’s prepared to act. While passive defenses form the foundation of fire-safe design, active systems provide a critical second layer: they respond in real time when threats arise.

In our final installment of our Built to Endure series, we explore exterior fire sprinkler systems and fire retardant coatings - two powerful technologies that activate when danger is near to help protect your home from wildfire.

WHY ACTIVE SYSTEMS MATTER

Even the best materials and design detailing cannot eliminate all risk. Wildfire events often occur:

  • Without warning, when evacuation is already underway
  • During red-flag wind events, which scatter fire particles far ahead of flames
  • In conditions where first responders are overwhelmed or unable to reach remote properties

That’s where active defense steps in—automatically wetting and sealing vulnerable areas to reduce ignition potential.

EXTERIOR FIRE SPRINKLER SYSTEMS

Exterior sprinkler systems are designed to operate before fire reaches your home. By spraying water over key surfaces and landscapes, they help suppress embers and reduce heat buildup during wildfire exposure.

1. Roofline Sprinklers
Mounted at eaves or rooftop edges, these systems deliver water to:
  • Roofing surfaces
  • Soffits and vents
  • Upper-level siding and windows
Best for: Homes with pitched roofs, combustible eaves, or wood siding
2. Perimeter Ground Sprinklers

Located along the base of the home or in surrounding landscape beds, these systems moisten:

  • Ground-level siding and lower walls
  • Decorative mulch, vegetation, or fuel sources near the foundation
Best for: Homes with foundation plantings, sloped sites, or adjacent vegetation
3. Resilient Features for Real-World Conditions

Exterior sprinkler systems are only as effective as their ability to function under pressure. That’s why modern designs include:

  • Wind-resistant spray heads to maintain coverage in gusty conditions
  • Backup power supplies (battery or generator) to operate during outages
  • Automated triggers or remote control options for fire-season readiness
Best for: Any home in a High Fire Hazard Severity Zone (HFHSZ) or Wildland-Urban Interface (WUI) area
FIRE RETARDANT COATINGS

In addition to water-based defenses, fire retardant coatings provide another layer of protection—one that works quietly in the background but activates under extreme heat.

1. Intumescent Paints

These specialty coatings expand when exposed to high temperatures, forming a thick, insulating char layer that slows heat transfer and ignition.

Best for:
  • Exposed framing
  • Eaves and soffits
  • Structural steel or siding elements requiring added protection
2. Fire-Resistant Sealants

Used to seal gaps, joints, and seams, these materials prevent fire particles or smoke from entering cracks where fire could take hold.

Best for:
  • Window and door perimeters
  • Siding junctions
  • Roof-to-wall transitions

While not a substitute for non-combustible construction, these coatings enhance the performance of both traditional and fire-rated materials - and may be especially useful during rebuilds in vulnerable zones.

Around the world, communities facing wildfire threats are rethinking what it means to build and rebuild for a future marked by resilience. Fire-resistive construction is not a singular solution, but a layered and adaptive strategy. From material choices and detailing to active defense systems that respond when it matters most, each decision adds strength, security, and peace of mind.

Through our Built to Endure series, we’ve aimed to share practical guidance and forward thinking strategies for those navigating this complex terrain. Whether you're rebuilding after loss or planning ahead, we hope these insights have offered clarity, confidence, and value as you shape a home that’s ready for what’s next. Enduring architecture is not just about standing strong, it’s about standing ready.

This Concludes our Built To Endure series - we will continue to keep you in loop with valuable recovery information and other important topics!

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