There are three products within the Rockwool Fire Duct System; Fire Duct Slab, Fire Duct Section and Fire Duct PSM, each specially designed for different applications. Fire Duct Slab is composed of high density insulation slab which is faced with reinforced aluminium foil. Fire Duct Section is made up of high density pre-formed pipe section faced with reinforced aluminium foil. Fire Duct PSM is formed of high density slab with factory machined grooves to allow for installation around larger circular ducts, again reinforced with aluminium foil.

Fire Duct Slab is best suited to rectangular duct applications. The alternative Rockwool solutions are designed for circular ductwork; Fire Duct Section for ducts of a diameter between 60mm and 610mm, and Fire Duct PSM for circular ducts with a diameter greater than 610mm. Fire Duct PSM is available for diameters greater than 406mm providing a choice of installation options.

The Rockwool Fire Duct Systems provide comprehensive performance for stability, integrity and insulation, for all ducts passing through fire-rated walls or floors.

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• Features & Benefits
• Applications

Features & Benefits

• Specified with confidence
• Quick and easy to install
• ½, 1, 1½ and 2hour fire protection for stability, integrity and insulation
• Choice of fixing options
• Single layer, enabling verification of system installation
• Space efficient, non-brittle, strong and safe
• Multi-role insulation: fire protection, acoustic and thermal
• Can be installed on standard DW144/42 ductwork
• Rockwool stone wool insulation products have been proven in service for over 60 years, in a wide range of climates and degrees of exposure, and will generally perform effectively for the lifetime of the building, plant or structure
• Naturally inert and rot-proof material that does not encourage or support the growth of fungi, moulds or bacteria, or offer sustenance to insects or vermin
• Chemically compatible with all types of pipes, ducts, equipment and fittings
• Fully certified to BS 476–24 (duct types A and B)
• Fire Duct Slab & Fire Duct PSM achieve non-combustibility: Class A1 to BS EN 13501-1
• Fire Duct Section achieves Non-combustibility: Class A2 to BS EN 13501-1 
• Authorised for use in LUL surface and sub-surface premises when installed in accordance with the product data sheet

Applications

For detailed application instructions please see the product data sheet and installation guide.

System Options – Rectangular Ducts

Welded Pin Fixing Method

• Attachment by welded pins allows extremely rapid installation with slab joints simply butted together
• Welded pins are generally spaced at 350mm maximum centres along the length of the duct and at 500mm maximum centres across the width and depth of the duct. Pins are required on all four sides of vertical ducts, but may be omitted from the top face of horizontal ducts
• Longitudinal corner joints fixed with pigtail screws at 250mm maximum centres (screw length to be 2 x slab thickness). Side wall slabs must overlap top and bottom slabs (as shown). Cross joints bonded with Firepro Glue

Alternative Joint Methods

• Instead of pigtail screws, longitudinal joints can be fixed with Firepro Glue and nails, at 500mm max. centres
• Instead of glue, cross joints can be protected with centrally positioned, 100mm wide Fire Duct strips fixed along both edges with pigtail screws at 250mm max. centres

Mitre-Joint Fixing Methods

• The use of mitre-joints at slab corners allows installation in situations where welding may not be practical

Mitre-Joint Method

• All joints bonded with Rockwool Firepro Glue. Longitudinal corner joints secured with nails while Rockwool Glue cures

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.