Based in Unit 102 Coolmine Ind Est

Fire Protection Insulation Dublin 

FirePro Fire Barrier System

As part of the comprehensive Firepro range of fire protection products, Rockwool Fire Barrier systems encompass new labour-saving fixing solutions to meet all general applications encountered on site. Focusing on ease of construction and installation, these new solutions offer the specifier and contractor cost effective options that are simple to install and reduce the risks of installation error. Rockwool Fire Barrier solutions offer insulation periods from 15 mins up to 120 mins. It is Rockwool's essential insulation performance that limits the heat transfer through the barrier, preventing ignition of combustible materials in the adjacent areas.

For more info regarding our energy saving solutions and insualtion producst, 

get in contact with Usher Insulations today!

Fixing solutions to concrete decks


Rockwool Fire Barrier systems have been developed to inhibit the spread of smoke and flames through concealed spaces in buildings and improve sound reduction.

The fixing solutions described in this data sheet have been designed to simplify detailing and incorporate, where possible, commonly available building fasteners and components.

Applications and design

Rockwool Fire Barrier solutions can be applied as a hanging curtain or as a friction fitted slab. The barrier is continuously supported and secured to the soffit at its head. At the base it is preferable in a cavity barrier situation to wire the barrier to the ceiling grid although it is acceptable to let it drape freely, turned back across the ceiling.

If the Fire Barrier is to form a continuation within a void of a fire-resistant partition, it is essential to fix the barrier to the partition head to maintain integrity.

Standards and regulations

Rockwool 30 minute and 1 hour cavity/fire barriers

Satisfies the requirements of the Building Regulations 1991 (2000 edition). Approved Document B and Appendix A, Table A1, for 30 minutes integrity and 15 minutes insulation.

Rockwool Fire Barriers and Fire Barrier slabs can be used where fire resistant partitions need to be continued above a ceiling into the roof void. They conform with the Building Regulations Approved Document B and fulfill all normal fire insulation requirements for divisions of space.


Composition and manufacture

Rockwool is manufactured from a melt of volcanic rock and limestone. The molten rock is spun into wool, treated with a small quantity of resin and cured to form a mat or slab.

A 25mm galvanised wire mesh is stitched with wire to one face to produce a flexible Fire Barrier with optional aluminium foil faces.

The Fire Barrier slab has a factory applied foil finish to both faces.

Rockwool Fire Barrier will achieve Euro class A1 when tested to the new European Fire Classification.

30 Minute (Half hour) Cavity Barrier - Typical fixing methods

Figures A-B show typical details for Fire Barrier applied to a timber truss construction as a half hour cavity barrier within the roof space to satisfy the requirements of Building Regulation B3 . ((4).

If the truss is constructed from a minimum timber size of 35 to 49mm thick, both sides of all truss members/bracing require protection from fire in order to minimise charring. Figure B shows strips of 50mm Fire Barrier used on the reverse side of the truss for this purpose. Alternatively, a second layer of Fire Barrier may be applied to provide 1 hour fire rating.

Nail plate fixings may fail prematurely in fire unless protected.

The new Rockwool fixing system incorporates an angle support and clamping plate.

For fixing to timber, the Rockwool clamping plate is used compressing the barrier to the timber fixed at 450mm centres.

For fixing to concrete soffits, the pre-punched angle support is fixed using Hilti DBZ or Ejot ECL 35 hammer set anchors at max. 750mm centres.

For fixing to steel purlins, use Hilti SMD 02Z (5.5 x 70mm)self-tapping screws at max. 450mm centres.

To use the patented Rockwool angle support system, bend tongues out to 90 Deg and impale barrier onto them. The slotted clamping plate is then fitted by pushing the tongues through the slots and these are then bent over the face of the clamping plate completing the process.

For more info regarding our energy saving solutions, 

get in contact with Usher Insulations today!

60 –30 Fire Barrier

If 30 minutes insulation is required, use 1 layer of 60mm foil faced fire barrier with 100mm vertical over lapped joints (Fig 10).The barrier is otherwise fixed as previously shown for timber construction on page 3.

Common details

Extended drops

Rockwool 50mm Fire Barrier single and double layers can be extended from a 3.5m drop to a maximum 6m drop by fixing an additional 2.5m section stitched with overlapped joints as per Figure 13. For drops over 6m in length please contact the Rockwool Technical Services for further information.

Wire stitching of butt joints in Rockwool Fire Barriers

Adjacent barriers must be closely butt jointed, or overlapped, and through stitched with 0.9mm galvanised annealed wire. It is essential that the barrier provides a good seal at its head, perimeter and at all joints.

Where the barrier abuts a profile such as a trapezoidal deck, the material must be cut to suit and secured to fire stop the gap.

For extended drops 1.5mm width galvanised, annealed wire is used.

Penetration details

Where Fire Barrier is penetrated by services pipework, beams or trusses, etc, the barrier is first cut locally to accommodate the service and then re-stitched as neatly as possible. The pipe, service or structural member is then sleeved each side of the barrier to a minimum length of 300mm,using the same barrier material. The sleeve should be wired to the main barrier to prevent it becoming detached from the barrier (see Figure 14).

If the penetrating service is manufactured from a low melting point material such as aluminium or pvc, then sleeving should be extended to 1m either side of the barrier.

Reference should also be made to the requirements of Section 10 to Approved Document B of the Building Regulations.

The unique, patented Rockwool support angle and clamping plate is used to fasten two 50mm Fire Barrier curtains with one support angle without the need for an airspace.

The Rockwool support angle has tongues that are pushed out from opposite sides at 300mm max. centres. The Rockwool Fire Barriers are then impaled on the tongues on both sides and clamped using the Rockwool clamping plates. The tongues are finally bent over the clamping plates, completing the system.

The system uses 50mm Fire Barrier in a double layer with joints staggered.

Note that wire reinforced sides should be placed outwards.

Fixing to timber structure (1 hour)

When a 1 hour Fire Barrier is supported on structural timber (for example a trussed rafter), and the thickness of timber is 35.49mm, one layer of 60mm Rockwool Fire Barrier must be placed on each side of the timber.

Where timber thickness is 50mm or greater,2 layers of 50mm Fire Barrier are sufficient.

Rockwool Angle

1 hour Fire Barrier Typical Fixing methods

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