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ROCKWOOL® Ductslab
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ROCKWOOL® Ductslab

Verified by manufacturer over a year ago

40 mm

ROCKWOOL Ltd Variant:
Third party certifications:
  • BSI Kitemark

    BSI Kitemark

    Certificate type

Thermal insulation for rectangular, square and circular ductwork.

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In order to regulate temperature within heating, ventilation and air conditioning systems insulation must be applied. ROCKWOOL Ductslab can provide the thermal insulation to these HVAC systems as well as cold water storage, feed and expansion tanks. This solution is acoustically absorbent and A1 non-combustible to deliver peace of mind.


Ductwrap is a lightweight and flexible insulation roll faced with reinforced aluminium foil.

Ductwrap is suitable for both circular and rectangular ductwork. This solution is recommended for service temperatures of up to 230˚C. The thermal insulation solutions are often applied to air conditioning, warm air and extractor ducts, located in plant rooms, boiler houses or externally.

In addition to its thermal properties, the mineral wool insulation delivers acoustic performance which can be desirable for applications to ducts that carry gases, fluids or particle solids at high velocities. The use of ROCKWOOL Ductslab can also significantly improve the level of environmental sound, for a far more pleasant working environment. 

Features and benefits:

  • Acoustically absorbent.
  • Non-combustible.
  • Water repellent.
  • Chemically inert.
  • Easy to handle and install.
  • CE marked in accordance with BS EN 14303.
  • The product has been authorized for use in LUL surface and sub-surface premises when installed in accordance with this data sheet.

General information


Stone wool

Semi-rigid insulation slab, faced with reinforced aluminium foil.




1000 mm


600 mm


40 mm

50 mm


Pr_80_77_76_53 Mineral wool duct slab insulationPrimary


T90/390 Feed and expansion cisterns

U90/490 Site-applied insulation to ductwork

Specification data - Mineral wool duct slab insulation


To BS EN 14304; ISO 14001.


Semi-rigid slabs.

Thermal conductivity

0.034 W/m·K.


Aluminium foil faced.

Reaction to fire classification

Euroclass A1 non-combustible.

Insulation thickness (minimum)

Consult manufacturer for thicker options.

40 mm.


Installing foil faced mineral wool lamella insulation on ductwork.

Nominal density

45 kg/m³.

Water vapour resistance

1000 MNs/g.



600 x 1000 mm.

Third party certifications

  • BS EN 13162
  • BS 5422

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