110mm Rockwool TCB Cavity Barrier

110mm Rockwool TCB Cavity Barrier and PWCB Cavity Barrier solutions deliver outstanding fire protection for timber frame and masonry structures. These products exceed building regulation standards for fire resistance in concealed wall cavities, with proven performance up to 60 minutes of integrity and insulation capability.

Built from non-combustible stone wool and wrapped in protective polythene sleeves, these cavity wall insulation barriers combine insulation with weather protection during construction. Colour-coded sleeves—red for TCB and white for PWCB—make identification straightforward.

The Rockwool cavity barrier combines fire safety, acoustic flanking control, and thermal bypass prevention in one product. It also seals perimeter edges effectively, minimising air leakage and heat loss.

Product specification

• Thickness: 110mm
• Length: 1200m
• Length Coverage: 1.2 LM (linear metre)
• Quantity: 1
• Also Avaiable in packs of: 18
• Thermal Conductivity: 0.038 W/mK
• R-Value: 2.47 m²K/W
• Fire Rating: A1

Key points

• Euroclass A1 non-combustible.
• FLEXI Edge ensures tight friction fit.
• High performing acoustic, thermal and fire protection properties.
• Will not slump, even if studs shrink.
• Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP).
• Easy to install
• Fire resistance up to 60 minutes (EI)
• Reduce acoustic flanking transmission
• Improves air leakage & heat loss
• Unaffected by building movement
• Suitable for vertical and horizontal applications
• Site durable & weather protected

Application

The 110mm Rockwool TCB Cavity Barrier works effectively in both vertical and horizontal orientations. For vertical installations, secure the flanges to the inner leaf at 150mm intervals using staples or clout nails before the outer cavity wall compresses them. In horizontal applications, fix only the top flange of the polythene sleeve.

Certification

Euroclass A1 fire rating: ROCKWOOL Cavity Barriers meet the highest fire safety standards and have been tested and assessed for up to 60 minutes of fire resistance (both integrity and insulation) in accordance with BS 476: Part 20.

• ISO14001: Compliant with Environmental Management standards.
• EN 13162: Manufactured in accordance with European standards.
• A+ rating on BRE Green Guide: Recognized for excellent environmental performance.

Fire Protection

The 110mm Rockwool TCB Cavity Barrier and PWCB Cavity Barrier products surpass minimum Building Regulation requirements for fire resistance in concealed wall cavities.

Resilient Performance

These cavity barriers remain unaffected by building movement, shrinkage, or thermal variations, maintaining consistent performance throughout the building's lifespan.

Durability

Designed to withstand on-site handling and installation stresses, these barriers provide permanent protection that lasts the lifetime of the structure.

Vertical or Horizontal Solution

ROCKWOOL Cavity Barriers adapt to both vertical and horizontal applications. In vertical installations, secure both flanges to the inner leaf at 150mm intervals, while in horizontal applications, fix only the top flange of the polythene sleeve.

Acoustic Protection

ROCKWOOL Cavity Barriers prevent flanking noise transmission through concealed cavities in external wall insulation and separating walls, enhancing acoustic comfort.

More Information on 110mm Rockwool TCB Cavity Barrier

• Manufaturer Link: 110mm Rockwool TCB Cavity Barrier
• Explore our full Rockwool Insulation range and filter by thickness or coverage on the left-hand side of the page. For project suitability advice or quantity discount quotations, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat for the lowest UK Rockwool Insulation prices.