Based in Unit 102 Coolmine Ind Est

Acoustic Insulation Dublin 

Rockwool Slabs

Rigid, Semi-Rigid and Flexible Slabs

Rockwool Rigid, Semi-rigid and Flexible Slabs are high quality resin bonded Rockwool Slabs that can be used for thermal, acoustic and fire insulation. They are manufactured in a variety of thicknesses and densities to suit most requirements. They are suitable for many applications including thermal insulation for floors, walls, boiler rooms and ice rinks, ventilation plants in all types of buildings and ships, acoustic ceilings and partition panels.

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  • CFC and HCFC free
  • Excellent thermal and acoustic insulation
  • Fire safe
  • Water repellent
  • Reduces risk of condensation
  • Resists high temperatures
  • Chemically inert
  • Rot proof
  • Offers no sustenance to vermin
  • Easy to handle and install
  • Cost effective
  • No maintenance


Rockwool Slabs conform to BS 3958: Part 5: 1986. 'Specification for bonded man-made mineral fibre slabs' and satisfy the requirements of BS 5422: 1990, 'Thermal insulating materials on pipes, ductwork and equipment'.


Standard size: 900 x 600 mm
Thicknesses: 30, 40, 50, 60, 75 and 100 mm

Non-woven mineral tissue, aluminum foil and various other finishes are available to special order.

The products are rated Class 0 as defined within the Building Regulations.

Service Temperature
Rockwool Slabs are bonded with a phenolic resin which is resistant to temperatures up to 230°C. They may be used at much higher temperatures, but some resin will be lost close to the hot surface.
For fire protection or use at continuous high temperature, the use of Rockwool Firebatt 825, Conlit 100 and 150, Fire Barrier or Wired Mat is recommended.

No CFCs or HCFCs are used in the manufacture of Rockwool materials.


Rockwool mineral wool works in two distinct ways to reduce noise, either by impeding the transmission of sound through an element of the structure or by absorption of sound at the surface.

Noise absorption is expressed as a factor between 0 and 1.0. The more sound that a surface absorbs, the higher its absorption co-efficient.

The structure of the fibres in Rockwool Slabs make them ideal for use as a sound absorber, with characteristically high co-efficients over a wide frequency range.

It is not practical to place reliance on differences of co-efficients of less than 0.15.


Thermal, acoustic and fire insulation for boilers, ducts and vessels, particularly in the chemical, petrochemical and power generating industries.

Generally, for furnaces, ovens, calorifiers, hot-water boilers, storage tanks, drying equipment and air conditioning plant.

Rockwool Slabs are suitable for a wide range of thermal, acoustic and fire insulation requirements within buildings, as detailed below.

Typical Details

1. Fire Protection

RW2 Slabs laid between joists in a loadbearing timber floor will provide 1 hour fire protection.

RW2 Slabs can also be used to stop small voids, in particular the gap under pitched tiled roofs in dwellings.

2. Thermal Insulation

Rockwool Slabs are suitable for use as an internal lining for solid or cavity walls and steel or timber framed structures.

RWA45 Slabs will provide thermal insulation at rafter level to meet Building Regulation requirements.

Flexible Slabs are used as a thermal and acoustic infill for partition panels and curtain walling units and suspended ceilings may be similarly insulated using Rockwool Flexible Slabs laid over the ceiling panels.

3. Acoustic Control

The Slabs are particularly suitable for acoustic infills in partitions and ceilings, providing a high level of control of both airborne and structure-borne sound.

They are also suitable for acoustic absorption in the linings of buildings, particularly in sound studios.

RW2 slabs are suitable for upgrading the sound insulation of a timber floor and the fire resisting floor detailed opposite (FR 907) will give a significant improvement in airborne sound insulation.

Rigid Slabs can be used in industrial applications such as acoustic splitters and acoustic damping of ducts.

5. Suspended Ceilings Construction: Rockwool Rollbatts draped
over suspended ceiling, providing thermal insulation and sound deadening. 'U' values depend on total roof construction.