Description
Product Overview
ROCKWOOL Flexi 180mm slabs provide high‑performance acoustic, thermal and fire‑safe insulation for framed walls, floors and roofs. The Flexi‑Edge compressible side ensures a tight friction‑fit between studs or joists, minimising gaps and maintaining long‑term performance.
Key Features & Benefits
- Flexi‑Edge Technology: Ensures tight, secure friction‑fit.
- Thermal Conductivity: 0.038 W/m·K (70 mm+ thickness = 0.038; 140 mm+ thickness = 0.035 W/m·K).
- Acoustic Absorption: High‑density stone wool reduces sound transmission.
- Euroclass A1 Non‑Combustible: Highest fire‑safety rating.
- Dimensional Stability: Will not slump; maintains thickness for building lifetime.
- Moisture‑Resistant Stone Wool: Water‑repellent, vapour‑permeable.
- Environmentally Responsible: Manufactured under ISO 14001 & ISO 9001.
Applications / Typical Uses
- Timber or metal stud internal partitions.
- Party/separating walls with acoustic requirements.
- Intermediate and suspended floors.
- Roof rafter applications and pitched roof insulation.
- Timber or steel external framed wall systems.
- Suitable for new build, refurbishment and upgrade works.
Installation & Handling
- Select slab size to match standard centres.
- Fit Flexi‑Edge side against stud for friction‑fit.
- Install on dry, structurally sound surfaces.
- Cut with long‑blade knife; avoid compressing slabs.
- PPE recommended: gloves, eye protection, dust mask.
- Follow ROCKWOOL installation guidelines for full performance.
Compliance & Certification
- EN 13162:2012 + A1:2015 compliant.
- Reaction to Fire: Euroclass A1 (EN 13501‑1).
- Manufactured to ISO 9001 & ISO 14001 standards.
- Suitable for use in systems requiring high fire resistance and acoustic performance.


























