Stopping solar roof fires: Why BarrierSheet and AllShield Blue make the difference

Solar energy is growing fast, but rooftop fires remain a real risk. Many ask: “How much heat can your roof coating resist?” The real question should be: “How can we stop the roof from catching fire at all?”  AllShield provides two non-combustible solutions: BarrierSheet and AllShield Blue. They ensure that even when something fails in a solar installation, the fire cannot spread across the roof.

The Hidden Risk: Even Fire-Retardant Roofs Add Fuel

On modern roofs, fire-retarding membranes and FM-qualified “low combustibility” insulation are commonly used. These delay ignition, but in practice they still add energy to the flames once a fire starts. On older roofs, the risk is even higher. Highly flammable EPS insulation and easily ignitable bitumen membranes are still widespread. When exposed to heat from a solar fault, these materials can turn a small spark into a fast-moving blaze.

Solar panels make the situation worse: positioned above the roof, they create an oven effect that traps heat. Even the best FM-rated roofing systems allow fire to spread 1.80 meters – directly igniting the next panel, and then the next. This is how a minor incident escalates into a complete rooftop fire.

The Right Approach: Stop Fire at Its Source

Some electrical components will fail over time. Fire safety cannot depend on “less combustible” materials alone. The only real solution is to ensure the roof itself does not burn.

BarrierSheet: The Sub-Membrane Fire Barrier

• Ultra-thin non-combustible layer.

• Installed under the roofing membrane.

• Prevents fire from spreading laterally across the roof.

• Suitable for both new builds and retrofits with solar panels.

AllShield RoofBlue: Protective Non-Combustible Coating

• Applied directly on top of the roof surface.

• Blocks ignition of materials such as EPS and bitumen.

• Extends roof service life by protecting against aging and weathering.

• Ensures small fires extinguish themselves, as there is no fuel left to burn.
  
  

Why Only a Fire-Safe Roof Works

Even the highest membranes and insulation cannot fully prevent fire spread; they merely slow it down while adding more fuel once ignition occurs. With solar panels creating trapped heat, the risk multiplies. By adding BarrierSheet or AllShield Blue, you stop fire at its origin. Flames cannot jump from one solar panel to the next. The fire dies out by itself – no active suppression required.

Secure Your Solar Roof for the Future

Insurance companies increasingly demand roofs that are proven non-combustible before insuring solar installations. Whether your roof is modern with fire-retardant layers or older with EPS and bitumen, the risk remains. With AllShield BarrierSheet and AllShield Blue, you transform any roof into a fire-safe, durable, and insurable system.

Take the step today toward a safer, greener, and future-proof solar roof.