Rockwool External Wall Dual Density Slab

Non-combustible
• ROCKWOOL stone wool achieves the highest ‘A1 – Non-combustible’ rating
under the European Reaction to Fire Classification System
• This means that it doesn’t burn and won’t contribute to any stage of a fire
Durable
• ROCKWOOL slabs are dimensionally stable and won’t shrink or degrade over the
lifetime of the building
• The dense outer surface provides a solid face for base coat application, and helps
to prevent overdriven fixings
• Offers a high resistance to wind and rain when exposed during installation
• Tried and tested: EWI providers across Europe have been using ROCKWOOL in
their systems for over 40 years
Breathable
• The breathable open-cell structure of ROCKWOOL stone wool allows water
vapour to pass through, while the randomly oriented water-repellent fibres work
to prevent water ingress
• ROCKWOOL stone wool has a vapour resistance similar to that of still air
Thermal performance
• When tightly butt jointed, the fibres of adjacent slabs will effectively knit together
• This eliminates heat losses that would otherwise be caused by gaps between
slabs
Acoustic performance
• EWI systems incorporating ROCKWOOL slabs can add significant mass to the
building envelope, helping to limit the transfer of sound and vibration, while the
fibrous nature of the product also helps to stop sound through absorption
• Test evidence demonstrates an improvement to the weighted sound reduction,
Rw, of up to 8 dB (substrate-dependent)

Download Technical Data Sheet.