250mm Rockwool Sleeved Cavity Barrier (SCB) 1.2m x 110mm

The Rockwool SCB is a flexible stone wool cavity barrier designed to help control fire, smoke, heat, and noise movement within external wall cavities. Encased in a durable polythene sleeve, it compresses neatly into place, creating a dependable seal that supports fire safety while also improving thermal and acoustic performance. Made for both horizontal and vertical installation, it offers a simple, robust solution for safeguarding cavity walls in residential, commercial, and multi-storey buildings.

Benefits

• Helps slow the spread of fire and smoke through wall cavities thanks to its stone wool core
• Compression-fit installation creates a tight seal that reduces air movement and heat loss
• Mineral fibre insulation naturally absorbs sound, reducing flanking transmission between internal and external areas
• Polythene sleeve protects against moisture and site dirt, maintaining performance during installation
• Suitable for masonry, timber frame, and steel frame constructions
• Lightweight, flexible, and easy to position around typical cavity wall irregularities
• Offers dependable long-term performance without sagging or deterioration
• Manufactured from durable, non-combustible stone wool for added peace of mind
  

Good to Know

• Designed for cavity depths from 50 mm up to large-format cavity spaces
• Available in multiple widths to match common wall build-ups
• Can be installed both horizontally and vertically to maintain continuous fire-stopping lines
• Compression ensures a snug fit — Joints should meet cleanly to maintain a continuous protective line.
• 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