150mm Rockwool TCB Cavity Barrier

150mm Rockwool TCB Cavity Barrier and PWCB Cavity Barrier solutions deliver outstanding fire protection specifically engineered for timber frame and masonry construction. These products exceed minimum building regulation standards for fire resistance in concealed wall cavities, with proven performance through rigorous testing delivering up to 60 minutes of integrity and insulation capability.

Manufactured from non-combustible stone wool and wrapped in protective polythene sleeves, these cavity wall insulation products provide thermal performance alongside weather protection during construction. Colour-coded sleeves—red for TCB and white for PWCB—enable quick product identification on site.

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

Product specification

• Thickness: 150mm
• Width: 150mm
• Length: 1200m
• Length Coverage: 1.2 LM (linear metre)
• Quantity: 1
• Also Avaiable in packs of: 8
• 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

Install 150mm Rockwool TCB Cavity Barrier vertically or horizontally depending on your project requirements. For vertical applications, secure both flanges to the inner leaf at 150mm intervals using staples or clout nails before the outer cavity wall compresses the product. In horizontal installations, fasten 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

150mm Rockwool TCB Cavity Barrier and PWCB Cavity Barrier products have been developed to surpass the minimum Building Regulation requirements for fire resistance within concealed wall cavities.

Resilient Performance

The TCB Cavity Barrier and PWCB Cavity Barrier are unaffected by building movement, shrinkage, or thermal changes, ensuring consistent performance over time.

Durability

These barriers are designed to withstand on-site handling and once installed, they will endure for the lifetime of the structure, providing long-lasting protection.

Vertical or Horizontal Solution

ROCKWOOL Cavity Barriers offer versatility and can be utilised in both vertical and horizontal applications. In vertical installations, both flanges of the Cavity Barrier can be securely fastened to the inner leaf at 150mm intervals, while in horizontal applications, only the top flange of the polythene sleeve should be fixed.

Acoustic Protection

ROCKWOOL Cavity Barriers effectively prevent flanking noise transmission along concealed cavities in both external wall insulation and separating walls, enhancing acoustic comfort within the building.

More Information on 150mm Rockwool TCB Cavity Barrier

• Manufaturer Link: 150mm Rockwool TCB Cavity Barrier
• Have a browse of our Rockwool Insulation stock and filter by thickness or coverage on the left-hand side of the page. If you'd like to talk through the suitability of some products for your project, or get a quantity discount quotation please call us by phone on +4402038839057 , email sales@insulationbee or Live Chat - Lowest UK Rockwool Insulation Prices.