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FIREPRO® Fire Duct Systems - Fire Duct PSM

Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type


Mineral fibre fire protection, thermal and acoustic insulation slabs for circular ductwork.

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+44 (0)1656 862621 www.rockwool.co.uk

For circular ducts.


Mineral fibre fire protection, thermal and acoustic insulation slabs for circular ductwork.

Part of the Firepro® range of fire protection products. Fire duct systems provide fire protection, thermal and acoustic insulation for circular and rectangular ductwork. The simplicity and flexibility of fixing options ensure rapid and reliable installation to both vertical and horizontal duct systems.

All fire duct products are supplied faced on one side with reinforced aluminium foil.

Rockwool insulation products do not contain blowing agents with an ozone depletion potential (ODP) or global warming potential (GWP), are CFC/ HCFC/ HFC-free and 97% recyclable. They will not react with metal components or cause loss of plasticizer from polyvinyl chloride (PVC) cables and pipes.

Features and benefits:

  • Made of Fire Duct Slab with machined grooves to suit specific duct diameters.
  • Quick and easy to install.
  • Fully certified to BS 476–24 (duct types A and B).
  • 30, 60, 90 and 120 minutes 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.
  • Also available in pipe section and slab formats, specified separately.


For circular ducts.

General information

Uniclass 2015

Pr_80_77_76_53 Mineral wool duct slab insulationPrimary


U90/490 Site-applied insulation to ductwork

U90/58 Site-applied insulation to ductwork

Specification data - Mineral wool duct slab insulation

Product Reference

Fire Duct PSM


508 mm

Thickness: 50 mm.

610 mm

Thickness: 100 mm.

629 mm

Thickness: 100 mm.

712 mm

Thickness: 70 mm.

715 mm

Thickness: 50 mm.

762 mm

Thickness: 100 mm.

813 mm

Thickness: 100 mm.

915 mm

Thickness: 50 mm.

915 mm

Thickness: 50 mm.

1118 mm

Thickness: 100 mm.



Firepro glue

Pigtail screws

Welded steel pins

Standard product features


1000 mm.

Surface Spread of Flame:

Class 1 to BS 476-7.


BS EN 13501-1 Class A1.

Thermal conductivity:

0.035 W/m·K at 10°C.

Fire performance:

Certified to BS 476-24 Type ‘A’ and ‘B’: Up to two hour fire protection for stability, integrity and insulation.

Third party certifications
  • LPCB Red Book approved product: Cert. No. 022f
  • ASFP Blue Book listed
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