This 4 mm Tenmat FF102/25 ventilated cavity barrier provides essential fire protection for building cavities. It expands rapidly under heat, sealing ventilation gaps to prevent flame and smoke from spreading through wall cavities. At just 4mm thick and measuring 1 Meter in length at 35x1000mm, it fits neatly into narrow spaces.
The barrier features fire-rated intumescent (swells when exposed to heat) materials, meeting stringent UK fire regulations. It's specifically designed for use in external cladding and façade systems requiring effective ventilation and fire resistance. Weighing approximately 0.5 kg per piece, it’s easy and safe to handle on-site.
Installation is quick, requiring only standard fixings, with minimal disruption. The barrier maintains airflow during normal conditions yet provides immediate sealing in fire situations.
Suitable for commercial and residential projects, it complies fully with UK building standards, ensuring safety and regulatory compliance.
It’s tested to BS 476 Part 20 and offers up to 60 minutes
Key Features
Made in the UK Ideal for 25mm ventilated cavities Offers up to 60 minutes of fire resistance Tested to BS 476 Part 20 Compatible with timber substrates
Tenmat
Insulation
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Delivery is free to Mainland England and Wales. Deliveries are chargable to Scotland.
Once the order is placed, our courier will call you within 3 working days to arrange a delivery date. If you do not hear from the courier within 3 days, please get in touch with us. The majority of deliveries are made within 7 days, occasionally a little longer during peak periods.
Deliveries are made between 08:00 and 18:00 on the day, we request the driver calls you one hour before with an advised time.
Delivery is made via a kerbside tail lift lorry, we cannot deliver to sloping ground as the tail lift must be able to lay flat.
The road must be wide enough for a lorry to fit down and free from obstruction, if there are any access restrictions, please contact us.
Deliveries must be signed for, please report any damages to us within 24 hours.
We offer all bricks with a tail lift offloading service, Please familiarise yourself with the information below.
Crane offloading is available as a premium service for some bricks.
FAQ
All of our C16 and C24 graded timber is regularised
Regularised timber is timber that has been processed to have a uniform shape and size. This means that the wood has been sawn and planed to remove any irregularities and ensure that each piece of wood has consistent dimensions. Regularised timber is often used in construction, particularly in the framing of buildings, as it is easier to work with and can be more efficiently installed than irregularly shaped timber.
We have one of the largest ranges of timber lengths, dimensions and grades available to buy online.
The variation you require will determine the exact lead time and delivery method.
Most orders arrive within 3-4 days, the maximum is 7 days. Please get in touch before you order if you need a specifc delivery date.
Delivery charges vary by postcode. To find out the delivery charge, add the item(s) you require to your basket and select CALCULATE SHIPPING at the bottom of the page.
Some orders are delivered on our own vehicles based in Leicestershire and Cheshire. We also use carriers including Yodel and Tuffnells. For some sizes and locations we use regional distributors.
If you'd prefer crane offloading rather than tail lift vehicle offloading for your brick order then this service is available for the majority of bricks that we sell. Charges are shown at checkout.
For deliveries of less than 6 packs then Taillift offloading is normally a more cost effective option
Downloadable information can be found here:
Armstrong Cheshire supply the full range of Catnic Lintels. If you don't see the lintel you need on our website, choose from the Catnic Lintel Selector Brochure and give us a call 01625 322269
Downloadable information can be found here:
This 4 mm Tenmat FF102/25 ventilated cavity barrier provides essential fire protection for building cavities. It expands rapidly under heat, sealing ventilation gaps to prevent flame and smoke from spreading through wall cavities. At just 4mm thick and measuring 1 Meter in length at 35x1000mm, it fits neatly into narrow spaces.
The barrier features fire-rated intumescent (swells when exposed to heat) materials, meeting stringent UK fire regulations. It's specifically designed for use in external cladding and façade systems requiring effective ventilation and fire resistance. Weighing approximately 0.5 kg per piece, it’s easy and safe to handle on-site.
Installation is quick, requiring only standard fixings, with minimal disruption. The barrier maintains airflow during normal conditions yet provides immediate sealing in fire situations.
Suitable for commercial and residential projects, it complies fully with UK building standards, ensuring safety and regulatory compliance.
It’s tested to BS 476 Part 20 and offers up to 60 minutes
Key Features
Made in the UK Ideal for 25mm ventilated cavities Offers up to 60 minutes of fire resistance Tested to BS 476 Part 20 Compatible with timber substrates
Tenmat
Insulation
{PRODUCT_DESCRIPTION}
Delivery is free to Mainland England and Wales. Deliveries are chargable to Scotland.
Once the order is placed, our courier will call you within 3 working days to arrange a delivery date. If you do not hear from the courier within 3 days, please get in touch with us. The majority of deliveries are made within 7 days, occasionally a little longer during peak periods.
Deliveries are made between 08:00 and 18:00 on the day, we request the driver calls you one hour before with an advised time.
Delivery is made via a kerbside tail lift lorry, we cannot deliver to sloping ground as the tail lift must be able to lay flat.
The road must be wide enough for a lorry to fit down and free from obstruction, if there are any access restrictions, please contact us.
Deliveries must be signed for, please report any damages to us within 24 hours.
We offer all bricks with a tail lift offloading service, Please familiarise yourself with the information below.
Crane offloading is available as a premium service for some bricks.
All of our C16 and C24 graded timber is regularised
Regularised timber is timber that has been processed to have a uniform shape and size. This means that the wood has been sawn and planed to remove any irregularities and ensure that each piece of wood has consistent dimensions. Regularised timber is often used in construction, particularly in the framing of buildings, as it is easier to work with and can be more efficiently installed than irregularly shaped timber.
We have one of the largest ranges of timber lengths, dimensions and grades available to buy online. The variation you require will determine the exact lead time and delivery method.
Most orders arrive within 3-4 days, the maximum is 7 days.
Please get in touch before you order if you need a specific delivery date.
Delivery charges vary by postcode. To find out the delivery charge, add the item(s) you require to your basket and select CALCULATE SHIPPING at the bottom of the page. Some orders are delivered on our vehicles based in Leicestershire and Cheshire. We also use carriers including Yodel and Tuffnells. For some sizes and locations, we use regional distributors.
If you'd prefer crane offloading rather than tail lift vehicle offloading for your brick order then this service is available for the majority of bricks that we sell. Charges are shown at checkout.
For deliveries of less than 6 packs then Taillift offloading is normally a more cost effective option
Downloadable information can be found here:
Armstrong Cheshire supply the full range of Catnic Lintels. If you don't see the lintel you need on our website, choose from the Catnic Lintel Selector Brochure and give us a call 01625 322269
Tenmat FF102/25 Fire Rated Ventilated Cavity Barrier 1000x35x4mm
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£12.52
Unit price /
Unavailable
Tenmat FF102/25 is a 1m fire-rated cavity barrier designed for 25mm ventilated voids in timber frames and rainscreen systems. Expands in fire to block spread.
Tenmat FF102/25 Fire Rated Ventilated Cavity Barrier 1000x35x4mm
is backordered and will ship as soon as it is back in stock.
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Delivery charges will vary depending on your location.
To find out delivery cost to your postcode, add the products your require to your basket and then review your basket, entering the delivery postcode
We look to dispatch all products same-day where possible, we use a close network of couriers we have worked alongside for a number of years and will share any and all shipping updates with you directly.
This 4 mm Tenmat FF102/25 ventilated cavity barrier provides essential fire protection for building cavities. It expands rapidly under heat, sealing ventilation gaps to prevent flame and smoke from spreading through wall cavities. At just 4mm thick and measuring 1 Meter in length at 35x1000mm, it fits neatly into narrow spaces.
The barrier features fire-rated intumescent (swells when exposed to heat) materials, meeting stringent UK fire regulations. It's specifically designed for use in external cladding and façade systems requiring effective ventilation and fire resistance. Weighing approximately 0.5 kg per piece, it’s easy and safe to handle on-site.
Installation is quick, requiring only standard fixings, with minimal disruption. The barrier maintains airflow during normal conditions yet provides immediate sealing in fire situations.
Suitable for commercial and residential projects, it complies fully with UK building standards, ensuring safety and regulatory compliance.
It’s tested to BS 476 Part 20 and offers up to 60 minutes
Key Features
Made in the UK Ideal for 25mm ventilated cavities Offers up to 60 minutes of fire resistance Tested to BS 476 Part 20 Compatible with timber substrates
No reviews
Tenmat FF102/25 Fire Rated Ventilated Cavity Barrier 1000x35x4mm
This 4 mm Tenmat FF102/25 ventilated cavity barrier provides essential fire protection for building cavities. It expands rapidly under heat, sealing ventilation gaps to prevent flame and smoke from spreading through wall cavities. At just 4mm thick and measuring 1 Meter in length at 35x1000mm, it fits neatly into narrow spaces.
The barrier features fire-rated intumescent (swells when exposed to heat) materials, meeting stringent UK fire regulations. It's specifically designed for use in external cladding and façade systems requiring effective ventilation and fire resistance. Weighing approximately 0.5 kg per piece, it’s easy and safe to handle on-site.
Installation is quick, requiring only standard fixings, with minimal disruption. The barrier maintains airflow during normal conditions yet provides immediate sealing in fire situations.
Suitable for commercial and residential projects, it complies fully with UK building standards, ensuring safety and regulatory compliance.
It’s tested to BS 476 Part 20 and offers up to 60 minutes
Key Features
Made in the UK Ideal for 25mm ventilated cavities Offers up to 60 minutes of fire resistance Tested to BS 476 Part 20 Compatible with timber substrates
Payment & Security
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Fire Resistance Where It Counts
The FF102/25 reacts fast under extreme heat. As temperatures rise, the barrier expands to block flames and smoke from moving through ventilated voids. This delay helps protect the structure and give time for evacuation or response.
Each 1m strip fits voids up to 25mm and installs with ease against OSB or timber boards. Its flexible design means it works in vertical or horizontal applications without fuss.
Easy Fit, Proven Performance
The product is assessed to BS 476 Part 20 with 60 minutes performance vertically and 30 minutes horizontally in timber frame builds. It works especially well in rainscreen façades and timber construction where fire-rated barriers are a must.
Designed for Rainscreen Systems
Ideal for rainscreen cavities, this barrier is often placed behind cladding or between timber framing. It maintains ventilation until exposed to fire, then seals tight to prevent fire spread.
Made with Intumescent Core
The material at the core of FF102/25 expands rapidly under heat. It fills the cavity space quickly and helps block the fire path, adding a vital safety buffer in building designs.
Built to Comply
The FF102/25 cavity barrier has been tested by Chiltern International Fire. It's built to perform against real-world fire scenarios and holds up under strict compliance standards.
Have a question?
If you have any questions about our products or would like to learn more about our shipping options please feel free to contact one of our team today.
