Rockwool RainScreen Duo Slab is a dual-density stone wool insulation designed for ventilated façades and cladding systems. Its firm outer layer ensures secure fixing, while the softer inner layer provides a continuous thermal barrier. Non-combustible, acoustically effective, and weather-resistant, it delivers long-lasting performance for residential, commercial, and high-rise buildings.

Benefits

Delivers excellent thermal stability to help improve building efficiency and support low-energy design
Non-combustible construction provides exceptional fire resistance for increased façade safety
Outer surface offers a firm, durable face for secure fixings in cladding and façade applications
Inner layer compresses against the structure for close contact and reduced thermal bridging
Naturally sound-absorbent stone wool helps limit external noise transmission into the building
Water-repellent fibres provide resistance to rain during installation while remaining vapour-permeable
Maintains thickness, shape, and performance over time, even in challenging weather conditions
Manufactured from stone-based materials with recycled content, supporting sustainable build practices

Good to Know

Suitable for ventilated rainscreen systems, sealed façade assemblies, and other external wall configurations
Available in a range of thicknesses to meet different thermal or acoustic specifications
Easily cut using a utility knife; wear gloves and a dust mask when cutting in unventilated areas
Store under cover, off the ground, avoiding prolonged exposure to sunlight and rain
Specialist PPE is not required, though a dust mask is recommended if cutting in unventilated areas

Fire Resistant Insulation