Rockwool Full Fill - Cavity Batt Insulation

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Brand: Rockwool
Country of Manufacture: United Kingdom
In Stock
Product Code: RWCB
Call us for Enquiry 03303130245

Rockwool Full Fill Cavity Insulation is a semi-rigid, full-fill insulation solution for masonry cavity wall construction. The Rockwool full fill cavity batts are suitable for use in both new builds or extensions. They are lightweight and easy to handle. The cavity batts are simple to install and provide a close fit against brick and blockwork.

The Rockwool cavity wall insulation is non-combustible. They contain water repellent additives that prevent moisture transmission between the outer and inner leaf and maintain insulation for the long term. The high-performing cavity batts are easy to cut into the required shape and size. The cavity batts enable minimum on-site wastage. The Rockwool full fill cavity insulation effectively reduces installation time by avoiding spaces and cold spots. They are durable products and offer long-term performance. 

Product Specifications:

  • Length: 1200mm
  • Width: 455mm
  • Thickness Available: 50mm, 75mm, 80mm, 100mm.


Pack Quantity

Pack Coverage (m2)













Key Features:

  • Rockwool full fill cavity insulation gives an outstanding thermal, fire and acoustic insulation
  • The mineral wool cavity batts act as a cavity barrier
  • Water repellent and prevents limits the risk of condensation 
  • Cavity wall insulation is non-combustible - Euroclass A1
  • Superior fit against blockwork.
  • Offer superior cavity wall insulation.
  • Rockwool insulation reduces installation time.
  • Lightweight cavity batts, easy to handle.
  • Dimensional stability - no sagging or slumping
  • Cavity wall insulation is 97% recyclable.


  • Mineral wool cavity batts are used for thermal insulation of external masonry cavity walls
  • Provides thermal insulation and acoustic protection of masonry party walls between dwellings.


  • Made from a renewable and plentiful naturally occurring resource,
  • Saves fuel costs and energy in use and relies on trapped air for its thermal properties
  • 97% recyclable
  • Has no ozone depletion potential (ODP) or global warming potential (GWP).

Product Details:

  • Thermal conductivity: 0.037 W/mK.
  • Fire classification: A1 as defined in EN 13501-1
  • Compliance: BS EN 13162, ISO 14001

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