Kingspan Insulated Plasterboard K118

Kingspan lives up to the "King" in its title by being the only manufacturer of high-performance, premium-quality phenolic insulated plasterboard on the market. With thermal conductivity values as low as 0.018 W/mK, Kingspan plasterboards are by far your best best when it comes to drylining and thermally protecting your home. We stock popular Kingspan Kooltherm K118 insulated plasterboards; a rigid board solution which provides 2-in-1 thermal protection and drylining for masonry walls and timber frames. 

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£1112.93
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What is Kingspan Insulated Plasterboard?


Kingspan insulated plasterboard offers an all-in-one solution to people looking to thermally protect and dryline their home. Insulated plasterboards are comprised of a fibre-free rigid thermoset phenolic core with a 12.5mm plasterboard bonded to its front surface and a low emissivity composite foil based facing on its reverse. These 2-in-1 boards (often referred to as thermal laminates) are used primarily for internal wall insulation; on masonry walls and between timber framing. 

What's more, the boards are manufactured with a blowing agent that has zero ODP (zero ozone depletion potential) and low GWP (low global warming potential), making them the go-to choice for people who care about their carbon footprint.

Kingspan Kooltherm K118 Insulated Plasterboard

Whilst Kingspan Kooltherm K118 is not the cheapest insulated plasterboard available, it is the most effective; knocking all other insulated plasterboards out of the park when it comes to thermal performance, with a lambda value of just 0.018 W/mK. Offering insulation, dry-lining and vapour control in one board, Kingspan's Kooltherm K100 range boasts a thermal conductivity of just 0.018 W/mK across all thicknesses. 

Kooltherm K118 is comprised of a sheet of phenolic foam (a premium performance insulation made from phenolic resin, a blowing agent, and an acid catalyst) that is then stuck to a 12.5m plasterboard. These Kingspan K118 insulated plasterboards have a composite foil reverse facing, allowing for effective vapour control.

Let's check the specs: 

  • Manufactured with a blowing agent that has zero ODP and low GWP
  • Can be installed on solid brickwork or solid stonework with ease
  • Resistant to the passage of water vapour and unaffected by air infiltration
  • 2400mm x 1200mm and are available in a range of thicknesses from 32.5mm to 72.5mm
  • Allows quick response heating
  • Suitable for both mechanical fixing or the dab and dot method


Kingspan Kooltherm K118 Insulated Plasterboard Certifications

The boards are manufactured under a management system certified to: 

  • BS / I.S. EN ISO 9001:2008 (Quality management systems Requirements)
  • BS / I.S. EN ISO 14001:2004 (Environmental Management Systems Requirements)
  • ISO 50001: 2011 (Energy Management Systems Requirements)
  • BS / I.S. OHSAS 18001:2007 (Health and Safety Management Systems Requirements) 

Frequently Asked Kingspan K118 Insulated Plasterboard Questions

Benefits of Kingspan Kooltherm K118 Insulated Plasterboard

As market-leaders in Phenolic Insulation, Kingspan's expertise shines through in their products. As can be seen in Kingspan Kooltherm K118 insulated plasterboard's specifications:


Are Kingspan Insulated Plasterboards Flammable?

One of the most common questions that customers ask us is whether or not Kingspan K118 insulated plasterboards are flammable. The Euroclass scale measures the flammability of insulation materials. This system, which has been adopted by lots of countries in the European Union, rates insulation products from A1 (non-combustible) to F (very combustible).

The rigid plasterboard has a Euroclass rating of A2, meaning it has a limited contribution to fire. Overall, Kingspan Kooltherm K118 Insulated plasterboard has a Euroclass rating of B. They are classed as a combustible material but have limited contribution to fire.

Which Kingspan Insulated Plasterboard Thickness Should I Choose?

There are lots of Kingspan insulated plasterboard thicknesses to choose from. We stock Kingspan Kooltherm K118 boards that range from 32.5mm to 72.5mm. The board that you should choose depends on the constraints of your project.

You might need to choose a board that is thin enough to fit alongside a build-up of other materials. Other people just need the board itself to fulfil their project requirements. Always consult with a professional if you are unsure. 

How to Install Kingspan Insulated Plasterboard?

Kingspan insulated plasterboard can be mechanically fixed or installed via the dot and dab technique. Mechanical fixings are one of the most popular installation options because they hold the board firmly in place.

The dot and dab technique is a variation of the traditional wet plaster method. It involves pasting adhesive to the wall in dots and dabs. Then, you can simply place the plasterboard on the wall. This method is far quicker than plastering an entire wall and saves money in the process. For more information on dot and dab, check this article