The Tenmat FF102/50 is a 6mm thick ventilated cavity fire barrier designed for horizontal installation in external wall cavities up to 50mm wide. Its rigid intumescent strip expands rapidly under heat, sealing gaps up to 44mm to block fire and smoke spread. The aluminium foil casing facilitates easy handling and installation, making it ideal for ventilated rainscreen and cladding systems. This barrier maintains airflow under normal conditions and requires no maintenance post-installation.

Tested to BS EN 1363-1 and ASFP TGD19 standards, the FF102/50 provides up to 120 minutes of fire integrity and insulation. It holds third-party certification from IFC and is CCPI verified. Each strip measures 1000mm × 75mm × 6mm and weighs approximately 0.88 kg. Installation involves stainless steel fixings at 250mm centres. Suitable for masonry, timber frame, and SFS constructions, it offers a durable, compliant solution for passive fire protection.

Key Features

Tenmat
Insulation

The Tenmat FF102/50 is a 6mm thick ventilated cavity fire barrier designed for horizontal installation in external wall cavities up to 50mm wide. Its rigid intumescent strip expands rapidly under heat, sealing gaps up to 44mm to block fire and smoke spread. The aluminium foil casing facilitates easy handling and installation, making it ideal for ventilated rainscreen and cladding systems. This barrier maintains airflow under normal conditions and requires no maintenance post-installation.

Tested to BS EN 1363-1 and ASFP TGD19 standards, the FF102/50 provides up to 120 minutes of fire integrity and insulation. It holds third-party certification from IFC and is CCPI verified. Each strip measures 1000mm × 75mm × 6mm and weighs approximately 0.88 kg. Installation involves stainless steel fixings at 250mm centres. Suitable for masonry, timber frame, and SFS constructions, it offers a durable, compliant solution for passive fire protection.

Key Features

Tenmat
Insulation
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Tenmat FF102/50 Fire Rated Ventilated Cavity Fire Barrier - 1000×75x6mm

£24.50
1m FF102/50 cavity barrier for 50mm voids. Blocks fire and smoke while allowing ventilation. Certified to BS 476 Part 20.

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The Tenmat FF102/50 is a 6mm thick ventilated cavity fire barrier designed for horizontal installation in external wall cavities up to 50mm wide. Its rigid intumescent strip expands rapidly under heat, sealing gaps up to 44mm to block fire and smoke spread. The aluminium foil casing facilitates easy handling and installation, making it ideal for ventilated rainscreen and cladding systems. This barrier maintains airflow under normal conditions and requires no maintenance post-installation.

Tested to BS EN 1363-1 and ASFP TGD19 standards, the FF102/50 provides up to 120 minutes of fire integrity and insulation. It holds third-party certification from IFC and is CCPI verified. Each strip measures 1000mm × 75mm × 6mm and weighs approximately 0.88 kg. Installation involves stainless steel fixings at 250mm centres. Suitable for masonry, timber frame, and SFS constructions, it offers a durable, compliant solution for passive fire protection.

Key Features

  • Made in the UK

  • Fire-rated up to 120 minutes

  • Suitable for 50mm ventilated cavities

  • Tested to BS 476 Part 20

  • Vertical or horizontal installation

Description

The Tenmat FF102/50 is a 6mm thick ventilated cavity fire barrier designed for horizontal installation in external wall cavities up to 50mm wide. Its rigid intumescent strip expands rapidly under heat, sealing gaps up to 44mm to block fire and smoke spread. The aluminium foil casing facilitates easy handling and installation, making it ideal for ventilated rainscreen and cladding systems. This barrier maintains airflow under normal conditions and requires no maintenance post-installation.

Tested to BS EN 1363-1 and ASFP TGD19 standards, the FF102/50 provides up to 120 minutes of fire integrity and insulation. It holds third-party certification from IFC and is CCPI verified. Each strip measures 1000mm × 75mm × 6mm and weighs approximately 0.88 kg. Installation involves stainless steel fixings at 250mm centres. Suitable for masonry, timber frame, and SFS constructions, it offers a durable, compliant solution for passive fire protection.

Key Features

  • Made in the UK

  • Fire-rated up to 120 minutes

  • Suitable for 50mm ventilated cavities

  • Tested to BS 476 Part 20

  • Vertical or horizontal installation

Payment & Security

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Built for Cavity Fire Protection

The FF102/50 barrier is engineered for 50mm ventilated voids. It provides a 44mm clear air gap while maintaining critical fire resistance. Its slim profile fits into rainscreen façades and timber frame cavities without blocking airflow in normal conditions.
When exposed to heat, the intumescent material expands to seal off air paths. This helps slow fire spread through hidden voids. Each barrier comes in a 1m length for fast, accurate installation during early or retrofit phases.

Compliant with UK Fire Testing Standards

Tested by Chiltern International Fire, the FF102/50 complies with BS 476 Part 20: 1987. It’s designed to be fixed against OSB-faced timber construction, providing 30–60 minutes of certified fire resistance performance.

Simple Installation with No Specialist Tools

The barrier is lightweight and installs using friction-fit or mechanical fixing. No adhesives or sealants are required. Its flexibility helps reduce fit time on site while maintaining solid contact with cavity surfaces.

Effective in Any Cavity Orientation

Whether installed horizontally or vertically, the FF102/50 adapts to structural layouts. It works around junctions, gaps, or over services, helping maintain a continuous fire seal along the cavity line.

Supports Fire Board Insulation Compliance

Designed to complement other fire-rated products, this cavity barrier fits within a full insulation strategy. It performs alongside timber substrates and fire-rated boards, helping meet regulatory fire protection requirements.

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Order arrived early in morning, delivery staff were excellent and able to place order as close as possible to where I required it. excellent communication through out delivery and after delivery.

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Great quality wood and fast delivery The company reached out to make sure that everything was good and the delivery went fine

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Excellent service from a great company

Ordered 2T of midnight blue slate chipping (2 pallets of 50 bags each) Very nice product at a great price. Contacted quickly after order to arrange a suitable delivery date. Delivery was as arranged. Customer service is excellent including follow up call to ensure everything went well. All in all I would highly recommend Armstrong Cheshire.

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Great Customer Relations

Due to a mistake in communication ( mostly my mistake) the first delivery of bulk aggregate went to an address I used to live at. After asking to have a replacement delivery to the correct address Armstrong Cheshire re-scheduled the delivery within 3 days and with fantastic customer relations. I cannot recommend this company enough.

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Anonymous – 16 June

Steel Lintel

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