130mm Rockwool PWCB Cavity Barrier

130mm Rockwool PWCB Cavity Barrier provides superior fire protection for timber frame and masonry structures. Engineered to surpass building regulation standards, this product delivers up to 60 minutes of fire resistance integrity and insulation performance in concealed wall cavities.

Manufactured from non-combustible stone wool and wrapped in protective polythene sleeves, this cavity wall insulation solution offers weather protection during construction. Colour-coded sleeves (white for PWCB) enable quick identification on site.

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 infiltration and heat loss.

Product specification

• Thickness: 130mm
• Width: 200mm
• 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
• Fire Resistance - Up to 60 minutes

Key points

• Euroclass A1 non-combustible material.
• FLEXI Edge delivers secure friction fit.
• Outstanding acoustic, thermal and fire protection capabilities.
• Resists slumping even when timber studs contract.
• Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP).
• Simple installation process.
• Fire resistance up to 60 minutes (EI).
• Suppresses acoustic flanking transmission.
• Reduces air leakage and associated heat loss.
• Tolerates building movement without performance loss.
• Performs in vertical and horizontal orientations.
• Weather-resistant and site-durable.

Application

This 130mm Rockwool cavity barrier suits both vertical and horizontal installations. 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, fix only the top flange of the polythene sleeve.

Certification

Euroclass A1 fire rating: ROCKWOOL Cavity Barriers achieve the highest fire safety standards, tested and assessed for up to 60 minutes of fire resistance (integrity and insulation) under BS 476: Part 20.

• ISO14001: Environmental Management standards compliant.
• EN 13162: Manufactured to European standards.
• A+ rating on BRE Green Guide: Recognised for outstanding environmental performance.

Fire Protection

This 130mm Rockwool cavity barrier exceeds minimum Building Regulation requirements for fire resistance in concealed wall cavities.

Resilient Performance

The PWCB Cavity Barrier remains unaffected by building movement, timber shrinkage, or thermal fluctuations, maintaining consistent performance throughout its service life.

Durability

Designed to withstand on-site handling and installation stresses, this barrier provides protection for the entire lifespan of the building structure.

Vertical or Horizontal Solution

ROCKWOOL Cavity Barriers offer flexibility for both vertical and horizontal applications. Vertical installations allow both flanges to be secured to the inner leaf at 150mm intervals, whilst horizontal applications require fixing only the top flange of the polythene sleeve.

Acoustic Protection

This ROCKWOOL cavity barrier effectively blocks flanking noise transmission through concealed cavities in external wall insulation and separating walls, enhancing acoustic comfort.

More Information on 130mm Rockwool PWCB Cavity Barrier

• Manufaturer Link: 130mm Rockwool PWCB Cavity Barrier
• Browse our Rockwool Insulation range and filter by thickness or coverage using the left-hand navigation. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat - Lowest UK Rockwool Insulation Prices.