Foil faced mineral wool and intumescent fire barrier for rainscreen systems, providing an effective cavity barrier solution for 'open-state' voids within a variety of facade applications. Allows ventilation and drainage of the cavity under service conditions, whilst providing up to 60 minutes fire resistance performance.

Features and benefits:

  • Tested to suit 'open-state' voids up to 300 mm wide.
  • Allows an open continuous ventilated airspace of 25 mm.
  • Quick to install.
  • Supplied with two galvanized steel fixing brackets in 1 m lengths, and 'pigtail' screws.
  • Achieves a fire resistance performance of 60 minutes integrity and 60 minutes insulation.
  • Tested to ASFP TGD 19 (Fire Resistance Test for 'Open-State' Cavity Barriers used in the external envelope or fabric of buildings).

The brackets should be securely mechanically fixed to the internal wall at maximum 500 mm centres using non-combustible fixings.

VRB Lite requires the additional installation of four x 75 mm long course wound 'pigtail' screws impaled though the outer intumescent facing side of the product at 250 mm centres. The pigtail screws should protrude by a maximum of 25 mm, making contact with the rear of the rainscreen cladding, to ensure that an open continuous ventilated airspace is maintained. Consult manufacturer's literature for further installation information.

General information

Uniclass 2015

Pr_25_80_81_51 Mineral wool fire-stoppingPrimary


P12/360 Mineral wool rigid batts

P12/40 Mineral wool rigid batts

Specification data - Mineral wool fire-stopping

Product Reference




AIM Polythene sleeved wall cavity barrier

For vertical compartmentalisation.

Standard product features


1000 mm.


Total cavity size less 25 mm.


75 mm.

Similar products from AIM