Contact us
Kingspan Insulation
Kingspan Technical Insulation
Kingspan Great Britain
Kingspan Insulation
Kingspan Technical Insulation
Legal information
Cookie Policy & Control
Terms & Conditions of Website Use
Website Privacy Notice
Modern Slavery Act Statement
Group Approach to Tax
Gender Pay Gap
Direct Marketing Consent Notice
Customer Privacy Statement
Data Controllers

© 2026 Kingspan Holdings (IRL) Limited, All Rights Reserved

BACK TO TOP

Our Cavity Wall Insulation Solutions

We have 3 different solutions for cavity wall insulation, depending on the design and performance requirements. Scroll down for full comparison table.

Useful links

Cavity wall insulation support

Page updated 10/03/2026

Stay Updated

When insulating a cavity wall there are a number of cavity wall insulation types and options. From full fill cavity insulation to partial fill insulation, we have solutions to meet your needs.

Our 'Guide on cavity wall insulation' is a great place to find out more about whether full fill or partial fill is best for your project and what thickness you might need.

On this page you will find:

  • Our cavity insulation options
  • A comparison of the different solutions we offer
  • Useful links to help with your project, including how to find a stockist and standard construction details for junctions. 
Compare our Cavity Wall Insulation Solutions

Product

Advantages

Kooltherm K106 Cavity Board - full fill with a 10 mm cavity

Rigid insulation with a thermal conductivity of 0.019 W/mK. 

Can be a thinner solution than other commonly used insulants.

Insulation Boards

Cavity Wall Insulation

Our cavity wall insulation products are suitable for use in both partial fill walls and walls with a residual 10 mm cavity.

Building Regulations - Further Information

U-value calculator
Technical Information

U-value Calculator

We provide U-value calculations free-of-charge to show compliance with current Building Regulations, Standards and best practices. 

Types of insulation
Materials

Find your nearest stockist

Our insulation boards are stocked up and down the country. Use the interactive map to find your nearest stockist.

Construction details how it works 3
Thermal Modelling

Standard details and indicative psi-values

Our standard construction details provide psi-value calculations for the use of different Kingspan Insulation products at major junctions.

House Within A House Inside Case Study- 4:3
Homeowner

Homeowners Hub

Whether you're looking to keep your home warmer, cut energy bills, or upgrade your insulation, you'll find clear advice on choosing the right products.

Kingspan Technical Services
Technical Information

Technical services

Contact details for technical enquiries relating to insulation boards, cavity closers and membranes for Great Britain.

Toolbox Talk Presentation
Education & Training

Product Awareness Training

Our Product Awareness Training is delivered by dedicated technical experts who provide free onsite training and guidance to your team.

Virtual CPD image
Education & Training

CPDs & online learning

We have a number of in-person CPDs that can be booked, as well as 'Kingspan Learn' - our online training platform.

Positive woman searching new website for shopping via netbook at cafeteria, young successful hipster girl watching training webinar online via laptop computer while connected to wifi indoors
Insulation Boards

Sign up to our newsletter

Receive news about our latest products, business updates and key industry insights straight to your inbox by signing up to our quarterly newsletter.

Full fill cavity insulation with a 10 mm cavity that resists moisture penetration.

Indicative psi-values and thermally modelled junctions available.

Water-tight, vapour-open polypropylene fleece outer facing protects against moisture penetration.

Kooltherm K108 Cavity Board - partial fill

Rigid insulation with a thermal conductivity of 0.019 W/mK.

Can be a thinner solution than other commonly used insulants.

Clear cavity is maintained - resists moisture penetration.

Indicative psi-values and thermally modelled junctions available.

Low emissivity foil facings significantly increase the thermal resistance of the cavity.

Thermawall TW50 - partial fill

Rigid insulation with a thermal conductivity of 0.022 W/mK.

Clear cavity is maintained - resists moisture penetration.

Indicative psi-values and thermally modelled junctions available.

Low emissivity foil facings significantly increase the thermal resistance of the cavity.

Discover The Potential

Scroll For More

  1. Home
  2. Cavity Wall Insulation
Cavity wall installation

Approved Document B England - Insulation for Masonry Cavity Walls

Find out about the requirements for masonry cavity walls in Approved Document B England.

Knowledge Article5 min read
Cavity wall

Approved Document B Wales - Insulation for Masonry Cavity Walls

Find out about the requirements for masonry cavity walls in Approved Document B Wales.

Knowledge Article5 min read
Cavity wall

Technical Handbooks Scotland (Section 2 - Fire) - Masonry Cavity Walls

Find out about the requirements for insulating masonry cavity walls in Technical Handbooks Scotland.

Knowledge Article5 min read

Talk to Us

What can we help you with?
Click here to request a sample
Premium performance full fill cavity wall insulation
Featured

Kooltherm K106 Cavity Board

Premium performance full fill cavity wall insulation
Premium performance partial fill cavity wall insulation
Featured
High performance partial fill cavity wall insulation

Kooltherm K108 Cavity Board

Premium performance partial fill cavity wall insulation

Thermawall TW50

High performance partial fill cavity wall insulation