Knauf Insulation RainScreen Slab 1200x600x200mm

Rocksilk® RainScreen Slab is a BBA certified Rock Mineral Wool slab designed for use as sheathing insulation in rainscreen façade systems both below and above 18m in height. It is non-combustible with the best possible Euroclass A1 reaction to fire classification and is manufactured using Knauf Insulation's unique bio-based binder, ECOSE® Technology.

RainScreen Slab now BBA certified for a broader range of build ups

You can use Rocksilk® RainScreen Slabs for bridging Damp Proof Courses (DPC), as RainScreen Slab has earned the industry’s first BBA certification for bridging DPC’s of the inner and outer leaf.

Another industry first, Rocksilk® RainScreen Slab is now certified for double layering of the slabs in build ups.

It can now be used in a timber frame application with a masonry outer leaf and is suitable for use in a reinforced concrete substrate with cladding outer.

  • BBA Certified (certificate 16/5609) for use in multiple build-ups so it can be specified with confidence.
  • BBA Accredited 3D U-value calculation service - the most accurate calculation available.
  • Made with a water-repellent additive - slabs will maintain their integrity while exposed on site.
  • Slabs are engineered to adapt to minor imperfections in the substrates.
  • Suitable for use on all buildings including those above 18m in height.

Product code : 17SA1206200


Key Performance Criteria

  • Thermal Resistance : 5.85m2K/W
  • Thermal Conductivity : 0.034W/mK
  • Euroclass Fire Classification : A1

Associated products


Product Certifications

  • Non-Combustible A1 reaction to fire classification rating
  • Eurofins gold indoor air comfort certified product
  • A+ BRE Green guide rating
  • Bureau Veritas
  • CE Marking
  • British Board of Agrément approved for use in all exposure zones