Knauf Insulation Cavity and Internal Wall Insulation

Learn more about cavity and internal wall insulation

Cavity and internal wall insulation is used to improve thermal performance within wall structures, helping meet building requirements across new build and refurbishment projects. Suitable for a range of construction methods, these products support consistent installation and efficient coverage. Within our range, you will find insulation options designed for cavity walls and internal applications, allowing you to match the correct solution to your build specification. 

Typical uses

• Insulating cavity walls in new build construction. 

• Upgrading internal wall insulation in refurbishment projects. 

• Improving thermal performance alongside loft insulation. 

• Internal partition insulation for residential and commercial builds. 

How to choose the right cavity and internal wall insulation

• Select the correct insulation type based on cavity or internal application. 

• Check thickness requirements to meet project specification. 

• Confirm compatibility with the wall construction and build method. 

• Ensure suitability for the intended environment and condition. 

Before you order

• Measure wall areas accurately to calculate required quantities. 

• Allow for cuts, wastage and installation adjustments. 

• Check access and handling requirements on site. 

• Confirm compatibility with fixings and finishing materials. 

• Review fulfilment options including delivery information or Click & Collect.

Explore our range of cavity and internal wall insulation

Our range of cavity and internal wall insulation supports a wide variety of construction and refurbishment projects, helping improve thermal performance and meet build requirements. You will find options suited to different wall types, allowing you to select products that align with your project specification. These insulation products are commonly installed alongside Insulation Board, Loft Insulation and finishing materials such as Plaster & Plasterboards. Fixings and installation materials can be sourced from Fixings & Adhesives to support correct fitting. For ongoing projects, streamline procurement by setting up an account via Create an Account.