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NVFB Non-Ventilated Fire Barrier

NVFB Non-Ventilated Fire Barrier

Verified by manufacturer 5 months ago

Tenmat Limited

Fire barriers providing up to two hours fire protection for vertical external wall cavities.

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Suitable for closing vertical external wall cavities up to 600 mm wide.


Tested in accordance with EN 1366-4, NVFB Non-Ventilated Fire Barriers provide up to two hours fire protection for vertical external wall cavities. They are manufactured to suit cavity widths and are held in placed by a combination of compression and multi-purpose brackets.

Features and benefits:

  • Fire tested in accordance with EN 1366-4.
  • Can be supplied as plain fibre or shrink-wrapped.
  • Simple installation.
  • Up to 120 minutes fire rating.
  • Maintenance free.
  • Unaffected by humidity and moisture.
  • Good acoustic insulation.
  • Cold smoke seal.
  • Thermal performance.

General information


Mineral wool




(Total cavity plus 10 mm for compression fit) x 100 x 1000 mm. 



Pr_25_80_81_51 Mineral wool fire-stoppingPrimary


P10/40 Insulation fitted betweenor to the face ofstuds

P12/40 Mineral wool rigid batts

P12/360 Mineral wool rigid batts

Specification data - Mineral wool fire-stopping




Mineral wool.

Fire performance

Insert requirements. Up to two-hours (120 minutes) Integrity and Insulation dependent on cavity size and wall construction. Consult manufacturer's literature for more information.



2 No. multipurpose (MP) brackets fixed with self tapping non-corrosive steel masonry anchors.

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