Contact us
Kingspan Insulation
Kingspan Technical Insulation
Kingspan Ireland
Kingspan Insulation
Kingspan Technical Insulation
Legal information
Cookie Policy and Control
Terms & Conditions of Website Use
Website Privacy Notice
Data Controllers
Direct Marketing Consent
Customer Privacy Policy
Gender Pay Gap

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

BACK TO TOP

Discover More

What can we help you with?

How can we help you?
Send an Enquiry

Frequently Asked Questions

Ballycotton House_Cork_02_k3_tf70-k8-optimr

Ballycotton House

This project used four of our advanced insulation products in its floor, wall and roof.

Case Study4 min read
kingspan-what-is-external-wall-insulation-after-image

What is external wall insulation?

External insulation can be a great solution for both new and existing homes.

Knowledge Article4 min read
Daisy Lodge_Down_01_k7_k8_tf70

Daisy Lodge

The unique mountain lodge style building uses our insulation products in this beautiful project

Case Study4 min read
Happy Couple Hanging Picture on the Wall, Boyfriend Moves It, Girlfriend Tells Him when the Frame is Hanging Straight. Funny Moment in Young Couple's Life. Modern Stylish Apartment.

The Right Insulation for your Walls

The benefits of insulating your wall and Kingspan Insulation options available

Knowledge Article4 min read
  1. Home
  2. Wall Insulation Boards
  3. Kooltherm K5 External Wall Board
Kooltherm K5 Corner
Kooltherm K5 brick application render
Kooltherm K5 brick, brick application render
Kooltherm K5 block application render
Kooltherm K5-Brick-Block

Kooltherm K5 External Wall Board

Kooltherm K5 is a premium performance external wall insulation board for masonry walls. With a thermal conductivity as low as 0.021 W/mK, it allows for thin wall constructions. The boards are suitable for use behind traditional and lightweight polymer modified renders and can be retrofitted externally to existing properties without disturbing the occupants as all work is done from the outside.

Product Highlights

  • One of the thinnest commonly used insulants for external walls - reach the required U-value with minimal thicknesses

  • Ideal for buildings that can't be insulated on the inside

  • Ideal for refurbishment projects to improve BER or meet stringent retrofit standards

  • Doesn’t reduce living space, compared to insulated plasterboard

  • Find out more about SEAI Grants and funding

  • Perfect for retrofit projects with an installation process that has little to no impact on occupants

  • Can be used to modernise the aesthetics of older buildings

  • Lightweight insulation that is easy to transport, handle and install compared to some other commonly used insulants

  • Part of our Kooltherm range of premium performance insulation

Calculate U-value