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Soffit Insulation

Soffit Insulation

From Euroclass A1 rated insulation slabs to slim insulation boards, we can offer solutions for your soffit construction

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When insulating a structural ceiling (soffit), there are a number of insulation types and options. From thin insulation boards to maximise space, to Euroclass A1 rated mineral fibre, we have solutions to meet your needs.

On this page you will find:

  • Our soffit insulation options
  • A comparison of the different solutions we offer
  • Useful links to help with your project

Our Soffit Insulation Solutions

A microporous silica-based board used with rainscreen facades and soffits
Featured

AlphaCore Pad

A microporous silica-based board used with rainscreen facades and soffits

Premium performance soffit insulation

Kooltherm K10 Soffit Board

Premium performance soffit insulation

Premium performance soffit insulation

Kooltherm K10 PLUS Soffit Board

Premium performance soffit insulation

Rock mineral fibre soffit insulation

K-Roc Soffit Slab

Rock mineral fibre soffit insulation

Useful Links

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. 

Kingspan Technical Services
Technical Information

Technical Services

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

Virtual CPD image
Education & Training

CPDs

We have a number of CPDs that can be booked to further your knowledge.

Discover More

Kingspan Avoidable Costs How Thinner Insulation Can Help Save Money On Overall Construction Costs Article 3:4

What is the performance gap?

What is the performance gap, what causes it and how can we prevent it?

Knowledge Article5 min read
Kingspan Insulation Castleblayney Factory Airview

AVCP – What does it mean?

In this article we will look at what AVCP is and the different systems (levels) of AVCP.

Knowledge Article5 min read
What Are U-Values, R-Values And Lambda Values Article- 4:3

What are U-values, R-values and Lambda Values?

Lambda, R-values, U-values, Thermal Conductivity and Thermal Resistance simplified in one article

Knowledge Article4 min read
kingspan-who-we-are

Types of Insulation - a Guide

We manufacture five types of insulation for walls, floors and roofs.

Knowledge Article4 min read

Compare our Soffit Insulation Solutions

Material

Advantages

Products

Microporous silica-based insulation

    Suited to applications needing both thermal and fire performance in one solution

    Provides a thinner alternative to traditional insulants

    Ideal for applications that require a Euroclass A2-s1,d0 and constructions with limited space

AlphaCore Pad

Phenolic

    Thermal conductivities as low as 0.021 W/mK - can help to create a thin soffit construction

    Quick and easy to install compared to some other commonly used insulants

Kooltherm K10 

Kooltherm K10 PLUS - manufactured with an outer (exposed) facing of a 6 mm A1 Euroclass building board

Rock mineral fibre

    A1 Euroclass

K-Roc Soffit Slab

 

Page updated 02/03/2026

Frequently Asked Questions

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Our Soffit Insulation Solutions

Find out more about our products
A microporous silica-based board used with rainscreen facades and soffits
Featured

AlphaCore Pad

A microporous silica-based board used with rainscreen facades and soffits

Premium performance soffit insulation

Kooltherm K10 Soffit Board

Premium performance soffit insulation

Premium performance soffit insulation

Kooltherm K10 PLUS Soffit Board

Premium performance soffit insulation

Rock mineral fibre soffit insulation

K-Roc Soffit Slab

Rock mineral fibre soffit insulation

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