ARC TCB Square Cavity Barrier TCBSQ150/60 (75 x 380 x 380mm) by ARC Building Solutions

The ARC TCB Square TCBSQ150/50 is a high-performance, single-piece cavity barrier engineered to provide robust fire stopping around service penetrations in external timber frame walls. Designed specifically for low-rise developments, this innovative solution fits over soil pipes, flues, and MVHR ducts up to 150mm in diameter, sealing off the cavity "fast lane" where fire and smoke could otherwise spread unchecked.

Featuring a non-combustible rockfibre mineral wool core wrapped in a weather-resistant red polythene sleeve, the TCBSQ150/50 relies on a clean compression-fit design that eliminates the hassle of manually wrapping barriers or boxing-in linear runs. This product delivers outstanding acoustic performance by damping flanking sound, and its low thermal conductivity effectively kills thermal bridging around services to protect your project’s SAP ratings.

Key Features & Benefits:

• Proven Fire Protection: Provides up to 60 minutes of fire integrity and 15 minutes of insulation tested to EN 1366-4.
• Compliance Assured: Meets all cavity barrier requirements under Approved Document B, Scottish Technical Handbook Section 2, and Robust Details Part E.
• Third-Party Certified: Independently evaluated and certificated by IFC Certification (IFCC 1841).
• Thermally Efficient: Thermal conductivity of 0.037 W/m·K minimizes thermal bridging and optimizes building Ψ-values.
• Rapid Installation: Push-fit design needs no extra mechanical ties, foams, or sealants within the cavity core.
• Safe Material Composition: Rockfibre mineral wool core is non-hazardous and free from CFCs/HCFCs during manufacture.

Technical Specifications:

• Product Code: TCBSQ150/50
• Dimensions: 65mm (Thickness) x 380mm x 380mm (Square)
• Maximum Cavity Width: 50mm
• Maximum Penetration Diameter: Up to 150mm OD
• Sleeve Colour: Red

Installation Advice:

Familiarise yourself with the manufacturer's datasheet prior to fitting. Fix the built-in flanges to timber studs above and below the entry point to guide any potential moisture outward away from the internal leaf. Once the service pipe or duct is installed, slide the TCB Square cleanly over the penetration. Ensure a precise 15mm compression fit against the outer brickwork to form an airtight, fire-compliant perimeter without squashing or damaging the mineral wool core beforehand.