Buy Rocksilk® EWI Slab

Rocksilk® EWI Slab are high performance non-combustible Rock Mineral Wool slabs manufactured with a water repellent additive, and are designed for use in external wall insulation systems.

The fire resistance of the product removes the need for fire barriers, giving simple, quick and economical insulation for External Wall Insulation systems.

  • Excellent thermal performance.
  • Non-combustible Euroclass A1 Reaction to Fire Classification 
  • Excellent sound absorption characteristics 
  • Provides additional acoustic performance to the external wall.
  • Breathable, allowing moisture vapour to pass through the construction removing the risk of condensation.
  • Suitable for use with both silicone and mineral render systems
  • Easy to cut with a large bladed knife or serrated saw.

Buy yours with us today at or speak to one of our friendly staff on 02038839057

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