Kooltherm K5 External Wall Board

Phenolic insulation, like our Kooltherm range of products, is the most thermally efficient insulation commonly used. It is made through a manufacturing process where a rigid thermoset foam forms an insulating core between two facing elements, for example, a low emissivity composite foil.

Choosing a phenolic insulation will make it easier to reach those low target U-values with a minimal thickness of insulation.

Kooltherm's rigid thermoset foam forms an insulating core between two facing elements. At the start, a wet foam insulation mix is added to the bottom layer of facing. It then expands to meet the top layer. As it dries, the foam bonds to the facings. The foam is then cooked under pressure before curing and hardening it. The insulation boards are then cut into the necessary sizes.

External wall insulation is an insulation solution that is installed on the outside of a building's wall as part of an external wall insulation system. An external wall insulation system is an ideal solution to improve the energy performance of an already-occupied home as the work can be completed without an intrusive impact on the residents. It can also be used to improve the exterior look of a building, with many external renders often available as part of the system.  Learn more about our external wall solutions.

Kooltherm is a range of advanced phenolic insulation. It is the thinnest commonly used insulation board for any specific U-value. This means that you can benefit from reduced heating or cooling demand or use thinner boards to gain more space in your building.

Therma is a range of PIR insulation boards. It is not as thermally efficient as the Kooltherm range.

U-value is the inverse of the sum of the thermal resistances of the layers that make up an entire building element – for example, a roof, wall or floor. The lower the U-value, the better insulated the building element. It also includes adjustments for any fixings or air gaps. Therefore, our insulation doesn't have a U-value on its own.

Our technical team can complete a U-value calculation for your project if you have a few specific details you can share about it. Just follow the link at the bottom of the page.

Our Product Awareness Training is delivered by dedicated technical experts who provide free onsite training and guidance to your team. Our site experienced technicians cover the full range of Kingspan Insulation products and applications, from flooring to roofing and everything in-between, including both internal and external wall insulation.

The training covers:

• Suitable applications
• Packaging and storage
• Handling advice
• Sitework and detailing advice
• Installation information covering cutting, fixings, adhesives, protection layers and tape jointing
• Standards and approvals information

Find out more here

The Euroclass classification system is used to classify how construction products react to fire. Products are categorised from A1 (does not contribute to the fire) to F (fail) based on a series of tests set out in the standard. The tests used vary depending on the classification level being sought. The relevant testing standards and classifications are set out in EN 13501-1.

All products other than those rated A1 or F will also be tested and classified for smoke propagation — from s1 (little or no smoke) to s3 (substantial smoke) — and flaming droplets — from d0 (none) to d2 (quite a lot). Euroclass ratings are used in the Building Regulations and Standards and minimum ratings may be required for certain applications.

Learn more about the Euroclass system