Rockwool Thermal Insulation Cavity Batt 1200 x 455 x 100mm (3.28m² per pack) 6 Pack

The Rockwool Thermal Insulation Cavity Batt 1200 x 455 x 100mm is a premium stone wool insulation designed for partial-fill masonry cavity walls. It provides outstanding thermal, acoustic, and fire performance, making it the ideal choice for energy-efficient and safe building construction.

Manufactured from naturally non-combustible volcanic rock, Rockwool Cavity Batts combine excellent durability with moisture resistance, ensuring long-term performance and stability. Each pack covers 3.28m² and contains 6 slabs, offering easy installation between wall ties in standard cavity wall systems.

Features and Specifications

• Brand: Rockwool
• Product Type: Thermal Insulation Cavity Batt
• Dimensions: 1200mm (L) x 455mm (W) x 100mm (T)
• Pack Coverage: 3.28m² (6 slabs per pack)
• Material: Stone wool (rock mineral fibre)
• Thermal Conductivity: 0.037 W/mK
• Fire Rating: Euroclass A1 (non-combustible)
• Application: Partial-fill masonry cavity wall insulation

Benefits

• Superior thermal performance – helps meet energy efficiency targets and reduce heating costs.
• Fire-resistant design – Euroclass A1 non-combustible for maximum building safety.
• Water-repellent and breathable – resists water ingress while allowing vapour permeability.
• Enhanced acoustic insulation – minimises noise transfer between external and internal environments.
• Durable and stable – maintains shape and performance throughout the building’s lifespan.
• Easy to install – semi-rigid slabs friction-fit securely between wall ties for a consistent finish.

Ideal For

• Partial-fill masonry cavity wall insulation
• Residential and commercial buildings
• New build and refurbishment projects requiring high performance

Can Rockwool Cavity Batts be used for full-fill cavity walls?
No, these batts are designed for partial-fill masonry cavity walls. For full-fill applications, Rockwool offers other dedicated cavity wall insulation solutions.