250mm Rockwool Frontrock Super Dual Density External Wall Insulation Slab 1000mm x 600mm

250mm Rockwool Frontrock Super is a high‑performance, mineral‑wool board designed specifically for external wall insulation (EWI) systems. It combines two distinct density layers in a single panel to deliver both excellent thermal performance and robust structural support. The core of the slab is a low‑density, highly porous layer that provides outstanding thermal resistance (low λ‑value), while the outer surface is a higher‑density, tougher layer that resists impact, moisture ingress, and mechanical stress during installation and service life. As a mineral‑wool product, Frontrock Super Dual Density is non‑combustible, classified as Euroclass A1, and helps meet stringent fire‑rating requirements for façade systems. The material is vapour‑permeable, enabling the wall assembly to “breathe” and reducing the risk of trapped moisture that could lead to condensation or mould. Its dense outer skin also acts as a water‑repellent barrier, protecting the insulation core from liquid water penetration.

CHARACTERISTICS

• Dual‑density construction: low‑density core for thermal performance, high‑density outer skin for durability and impact resistance
• Excellent thermal efficiency: λ‑value typically 0.036 W/(m·K), enabling low U‑values with thin profiles
• Non‑combustible (Euroclass A1) – provides high fire safety for façade systems
• Vapour‑permeable yet water‑repellent: allows the wall to “breathe” while protecting the core from liquid water ingress
• High compressive strength – suitable for through‑fixings, renders and cladding without excessive deformation
• Good acoustic absorption – reduces airborne noise transmission through external walls
• Compatible with standard dimensions (e.g., 600 × 1200 mm) and can be cut on‑site with ordinary saws
• Works with a range of finishing systems (cementitious renders, mineral renders, insulated façade panels)
• Suitable for both new‑build and retrofit projects, helping to meet stringent energy‑efficiency standards

• New‑build residential, commercial and public buildings where high energy‑efficiency standards are pursued.
• Retrofit projects on existing masonry or concrete façades where added insulation thickness must be minimised.
• Situations requiring a fire‑rated external wall solution that still delivers strong thermal performance.

1. Finishing layer of the outer wall,
2. Frontrock Super slabs,
3. External wall,
4. Plaster

CERTIFICATION

• Conform to EN 13162:2012+A1:2015
  
• Achieves a reaction to Fire classification of A1, as defined in EN13501-1,
• CE certification: 1023-CPR-1207 P, 1023-CPR-1208 P, 1023-CPR-1203 P