Kingspan Kooltherm Phenolic Insulation Board

Kingspan is the only manufacturer of phenolic foam insulation in the UK. Phenolic foam can achieve thermal conductivity values as low as 0.018 W/mK, making it the best material for thermal performance. Kingspan Kooltherm boards deliver unparalleled protection against heat loss. These rigid boards are lightweight and easy to handle and install. Browse through our Kingspan Kooltherm boards to find premium thermal protection for walls, floors, and roofs.

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What Is Phenolic Insulation?

Phenolic foam is comprised of phenolic resin, a blowing agent, and an acid catalyst. It is used to make lots of different products, one of the most popular being insulation boards. It has over 90% closed-cell formation, making it extremely rigid and easy to handle. You do not have to worry about rot or fungal growth when you choose phenolic insulation boards. The rigid thermoset core is protected by two facings, which act as another barrier against the elements. 

To make phenolic insulation boards, Kingspan applies a layer of wet phenolic directly onto a facing. The foam expands and meets a top layer to achieve the desired thickness. When phenolic dries, it becomes tacky. It adheres to the top and bottom facings. Kingspan cooks the resulting board under immense heat, then cures it in a second oven. Cooked and cured phenolic is a distinct pink colour, which is distinguishable from yellow PIR foam. The boards have low thermal conductivity values and provide the best thermal protection that you can buy.

Difference Between PIR and Phenolic Insulation

Phenolic foam is often confused with PIR insulation. These two materials share a lot of similarities. Both PIR and phenolic are rigid thermoset foams that function as insulating cores between two facings. The main difference between them is the materials and the manufacturing process. 

PIR foam is made from isocyanate and polyol. PIR insulation boards are manufactured in much the same way as Kingspan Kooltherm insulation. The main difference is that PIR insulation has to be cured for much longer than phenolic insulation. Whereas phenolic boards are cured before they are packed, manufacturers cure PIR boards after they have already been packed. The boards cure in a temperature-controlled environment for one day per each 25mm of thickness. Phenolic has better thermal performance than PIR, reaching lows of 0.018 W/mK compared to the 0.022 W/mK of PIR. 

Both phenolic and PIR foam have combustible properties. However, they do deliver excellent protection against moisture and are ideal for areas with high rainfalls. You do not need to worry about rot or fungi growth when you invest in this type of insulation. 


Kingspan Kooltherm Standard Range

Kingspan creates a wide range of insulation boards. Their standard Kooltherm range contains the first phenolic insulation boards that Kingspan made. They can improve the thermal envelope of your home, but not as much as the newer boards in the K100 range. Kingspan Kooltherm insulation boards in the standard range have thermal conductivities between 0.020 and 0.023 W/mK. They have a lot of applications including ceilings, walls, and floors. 


Kingspan Kooltherm K100 Insulation

The Kingspan Kooltherm K100 range contains the most popular phenolic foam insulation boards in the UK. K100 boards are a newer addition to the Kingspan range and benefit from an improved manufacturing processes. They have a thermal conductivity value of 0.018 W/mK. If you want to improve the thermal envelope of your home, look no further than this range.

Kingspan is known for taking an environmentally-friendly approach to insulation. K100 boards are manufactured in an eco-friendly way. Kingspan uses a blowing agent with zero ozone depletion potential and a low global warming potential. Eco-concious individuals can reduce their energy consumption with Kingspan phenolic insulation.

Kingspan creates a board for every kind of insulation need. You can install K100 Kooltherm insulation in floors, walls, and roofs.

Frequently Asked Kingspan Kooltherm Insulation Questions


Where Can I Install Kingspan Kooltherm Insulation?

You can install Kooltherm insulation in floors, walls, and roofs. Each board has a different code in the title. K108 and K103 are part of the same K100 range but have different uses and properties. Boards in the same range are often not suitable for the same insulation project. Make sure that you choose the right code for your insulation needs. 

Here are a few examples of where you can install Kingspan Kooltherm boards.

Kingspan K103 insulation is designed for installation in floor buildups. You can install K103 phenolic foam boards in block and beam, timber, and concrete floors. The insulating core is surrounded by glass tissue facings. 

Kingspan K106 insulation is the most thermally efficient full-fill cavity wall insulation board available in the UK. When you choose K106 boards, you are getting the best of the best. These boards have a composite foil facing on one side and a polypropylene fleece on the other. They have a lambda value of just 0.018 W/mK. 

Kingspan K108 insulation is ideal for people who need a thermally efficient partial-fill insulation board. Partial-fill cavity insulation boards fill part of the space between two masonry walls. They are often installed alongside a build-up of other materials that have low thermal conductivity ratings. 

Kingspan K110 insulation is tailor-made for structural ceiling systems. These phenolic insulation boards are often used in commercial spaces such as car parks. We recommend Kingspan K110 boards for people who want long-lasting products for their new build or refurbishment project. 


Are Kingspan Phenolic Insulation Boards Flammable?

When fire touches phenolic foam insulation it undergoes thermal decomposition, which is called pyrolysis. There are two byproducts of pyrolysis. The first is pyrolysis gas and the second is a black char on the surface of the board. Pyrolysis gases are hot and combustible, meaning that phenolic insulation is not entirely anti-flammable. 

The fire resistance of insulation boards is measured against the Euroclass rating. Insulation materials undergo up to five different tests and get a rating that ranges from A (non-combustible) to F (very combustible). There are lots of Kingspan Kooltherm boards to choose from, which means that there are a few different ratings. A lot of Kooltherm boards have a rating of C on the Euroclass scale, meaning that they do not deliver the best or worst protection against fire.