External Masonry Cavity Walls
Knauf Insulation Masonry Cavity Wall insulation Glass Mineral Wool


Full-filling masonry cavity walls with mineral wool enables the best possible R-value to save energy costs and reduce thermal gain.

This application will become increasingly important in South Africa with the new SANS 10400-XA standard and the impact of EPCs (Energy Performance Certificates).

Our full-fill built-in solution is installed as the walls are built and is suitable for all types of buildings as detailed in the British Board of Agrément (BBA) Certificates.


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Why Mineral Wool?

  • Mineral wool slabs are sized to fit between wall ties without the need for cutting or fixings, reducing costs and increasing the building’s thermal efficiency.

  • Fully filling the cavity prevents mortar snots and other debris falling into the cavity, preventing bridges that can serve as a path for water to track from the outer to inner leaf.

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We offer the best insulation solution for each application

At Knauf Insulation, we are committed to helping our customers meet the increasing demand for energy efficiency. Browse our other application pages to find out more.