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Bridgehill®
FireBlock PV Membrane

Pitched Roof - Above Roofing

Bridgehill FireBlock Solar PV Membrane

FireBlock for Pitched Roof - Above Roofing is designed for retrofit solar installations. Installed on top of existing waterproofing and beneath PV panels, it requires no changes to the original roof.
In a fire, the membrane expands under heat to block flames and radiant heat, protecting insulation, timber, and structure.
It offers reliable fire protection without demolition or roof upgrades — quick to install and ideal for retrofitting pitched roofs with solar.

Size
1,15 m x 30 m | 3,77 ft x 98.43 ft
Weight
35 kg | 77.16 lbs
Peak temperature
± 1600 °C | 2912 °F
Working Temperature
± 800 °C | 1472 °F
Usage
Roof fire barrier membrane designed to prevent fire spread
Rating
Classification report for roof covering exposed to external fire according to EN 13501-5: Broof (t2)
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FireBlock PV Membrane Products
FireBlock PV Membrane Products
Albedo Effect.51597 1
Bridgehill FireBlock Solar PV Membrane
Technology
How It Works
When exposed to extreme heat, the membrane rapidly expands to form a thick, insulating barrier layer. This reaction is triggered by intumescent technology built into the material, causing controlled expansion that increases the membrane’s volume and thermal resistance. As the material expands, it helps block flame penetration, reduce heat transfer, and limit the spread of hot gases into the underlying roof assembly. The result is a temporary but highly effective fire barrier that protects insulation and structural components during critical stages of a fire event.

Active Expansion

When exposed to extreme heat, the membrane rapidly expands to form an insulating barrier layer. This reaction is triggered by intumescent technology built into the material.

Thermal Shielding

The expansion creates a dense, heat-resistant barrier that prevents flames, radiant heat, and hot gases from reaching the insulation and structural layers below.

Roof Preservation

By blocking thermal transfer, the membrane helps maintain the integrity of the roof deck, preventing ignition of combustible materials and structural collapse.

Fre Safety Layer

Bridgehill FireBlock Membrane functions as a fire safety layer, protecting roof structures from wildfire heat and wind-driven embers.

Bridgehill FireBlock Products

Fireblock Membrane Bridgehill Fireblock Fire Proof Membrane
Fireblock Membrane
FireBlock is a fire-resistant sandwich membrane with a multi-layer construction and a FireBlock core technology. The core is engineered to react to high thermal exposure while the outer layers provide mechanical stability and compatibility with standard roofing systems.
Adhesives And Tapes Bridgehill Fireblock Adhesive For Fire Proof Membrane (1)
Adhesives And Tapes
High-temperature-resistant adhesives and tapes are used to bond seams and overlaps, ensuring system continuity under fire conditions. The products retain adhesion and sealing performance at elevated temperatures, eliminating the need for mechanical fasteners.
Soap Bridgehill Fireblock Soap For Fire Proof Membrane
Soap
The installation soap is a surface preparation and installation aid that removes grease and contaminants to achieve consistent adhesion. The product is environmentally friendly and non-toxic, posing no risk to the surrounding environment.
Frequently Asked Questions

Wondering how FireBlock works, where it fits in the roof, or what it protects?
Below you’ll find clear answers to common questions about fire safety, installation, and performance for both new builds and retrofits with rooftop solar.

What is FireBlock Solar PV Membrane?

FireBlock Solar PV Membrane is a fire-resistant roof membrane designed to prevent fire from spreading from solar panel installations into the underlying roof structure.

What problem does FireBlock solve?

It blocks flames, radiant heat, and hot gases from solar panel fires, protecting combustible insulation and structural elements in the roof.

Where is FireBlock installed in the roof build-up?

FireBlock can be installed either above or below the waterproofing membrane, as well as on battens or sheeted roofs, depending on roof type and project requirements.

How does FireBlock work during a fire?

When exposed to extreme heat, the membrane expands and forms an insulating, intumescent barrier that prevents heat and flames from penetrating the roof assembly.

Is FireBlock tested in full-scale fire scenarios?

Yes. FireBlock has been tested in full-scale photovoltaic fire scenarios, demonstrating very low heat transfer to underlying insulation even during prolonged fire exposure.

Can FireBlock be used on both flat and pitched roofs?

Yes. The membrane is suitable for flat roofs, low-slope roofs, and pitched roofs.

Does FireBlock affect solar panel performance?

FireBlock does not negatively affect solar performance. In some configurations, it may support improved yield when used with bifacial panels.

Is FireBlock compatible with PIR and EPS insulation?

Yes. FireBlock has been tested and verified on both PIR and EPS insulation systems.

What standards and certifications does FireBlock comply with?

FireBlock is developed for compliance with EN 13501-5 (BROOF(t2)), and ICC evaluation approval for the US market.

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Thor Brubakken Bridgehill Fireblock Membrane
Meet Thor Brubakken
Thor brings a strong engineering background and broad experience across renewable energy and fire‑safety technologies. He has held leadership roles in solar‑ and building‑systems firms. At Bridgehill, he leads the development of advanced containment solutions™, driving high‑performance product architecture, scalability, and integration with global energy installations.
Contact Thor