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FV025 Small Ventilated Cavity Fire Barrier

Verified by manufacturer 1 month ago

Nullifire – a brand of Tremco CPG UK Ltd

Nullifire FV025 small ventilated cavity barrier consists of an encapsulated rigid intumescent band that is used to prevent the spread of fire for up to 60 minutes in shallow cavities.

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Application

  • Mechanically fixed within horizontal and vertical in shallow uninsulated cavities up to 25 mm wide to allow a ventilation and drainage gap.
  • High suited to timber framed construction, masonry and external planked weatherboards.

Description

A fire-rated product designed to act as an external wall cavity barrier at the junction of compartment floors, within uninsulated cavities. Third party tested and proven to reinstate the fire resistance performance within “open state” external wall cavities for periods up to 60 minutes, for both integrity and insulation to the principles of ASFP TGD 19 guidance.


Ventilated design – developed to allow maximum ventilation of cavities reducing the need for cavity trays or weep holes. Suitable for “open-state” ventilated cavities up to 25 mm wide.


Provided in strips 1 m long, 35 mm wide and 4 mm thick lightweight - designed to be easily and quickly installed. No maintenance is required after installation

General information

Color

Silver

Finish

Other

Guidance for specification option:

Plain.

Material

Aluminium

Intumescent

Manufacturer guidance

Compressed rigid high expansion intumescent minerals encased in aluminium foil.

Shape

Rectangle

Length

1000 mm

Width

35 mm

Height

4 mm

Warranty description

Other

Guidance for specification option:

Any product which has been applied (a) in accordance with Tremco CPG UK Ltd written instructions and (b) in any applications recommended by Tremco CPG UK Ltd, but which is proved to be defective, will be replaced free of charge.

Uniclass

Pr_25_80_80_44 Intumescent sleeved mineral wool cavity fire barriersPrimary
Pr_25_80_80_79 Sleeved mineral wool cavity barriers

CAWS

P12/40 Mineral wool rigid batts

P12/360 Mineral wool rigid batts

P10/70 Sleeved small cavity barriers

P10/420 Sleeved mineral wool small cavity barriers

Product range

Cavity Fire Barriers

Specification data - Intumescent sleeved mineral wool cavity fire barriers

Standard

Tested and certified in accordance with ASFP Technical Guidance Document TDG19.

Fire performance

Fire-rated for up to 60 minutes.

Guidance for specification option:

Depending on the application. Consult manufacturer and insert requirements.

Material

Compressed rigid high expansion intumescent minerals encased in aluminium foil.

Thickness

4 mm.

Cavity width

25 mm.

Air gap

21 mm.

Guidance for specification option:

For ventilated shallow cavities up to 25 mm (the required air gap is 21 mm max).

Length

1000 mm.

Height

35 mm.

Bond

Fixed with ø5 mm stainless steel screws or nails with a head size no greater than 11.5 mm at 250 mm centres.

Guidance for specification option:

Fasteners supplied by others.

Shape

Rectangle.

Colour

Silver.

Expansion

26:1 ratio.

Durability

Type X.

Guidance for specification option:

Intended for use in conditions exposed to weather (UV, rain and frost).

Operating temperature

80°C.

Manufacturer guidance

Maximum.

Service temperature

-20°C to + 70°C.

Storage

Store in dry, ambient conditions between -20°C to + 70°C.

Life expectancy

≥60 years.

Guidance for specification option:

At least 60 years.

Shelf life - unlimited when stored as recommended.

Installation accessories

Tape measure.
Saw.
Levelling device.
Drill.
Mechanical screw driver.
Masonry drill bits.
Suitable fasteners.

Manufacturer guidance

Consult manufacturer for guidance.

Execution

Guidance for specification option:

In strict accordance with the manufacturers Technical Data Sheet, Test Data and separately available detailed NBS Product Specification. The principal designer must approve the use of any cavity barrier, whether open-state or full-fill, in conjunction with the products fire classification reports, taking full account of the whole construction of the external wall systems and the components, including any requirements of the Building Regulations and Warranty provider standards. Ensure the installation area is free from dust, oil and any corrosive material.


Check the mounting substrate is solid and free from cracks and degradation before beginning.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

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