92.5mm Kingspan Kooltherm K118 Insulated Plasterboard

92.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for mechanically fixed and adhesively bonded internal wall applications. This all-in-one product combines insulation, drylining, and vapour control in a single board, achieving exceptional thermal performance with a conductivity rating of 0.019 W/mK. Ideal for retrofit and new build projects on solid masonry, brickwork, and timber frame constructions, it creates slim wall assemblies without sacrificing insulation quality.

The 92.5mm Kooltherm Kingspan delivers several key advantages. As one of the thinnest Internal Wall Insulation (IWI) options available, it maximises usable floor space in properties where external insulation is impractical. The lightweight design simplifies handling and installation, whilst the integrated drylining and vapour barrier eliminate the need for additional layers.

Properties

Model: 92.5mm K118

Thickness: 92.5mm

Pack Quantity: 8 sheets

Pack Weight: 320.88kg

Dimensions: 2,400mm x 1,200mm x 92.50mm (80mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 4.50m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 23.04m2

Insulation Material: 92.5mm Kooltherm K118 is a premium performance, lower-lambda rigid thermoset phenolic pir insulation.

Finish: Kraft facing ǀ Composite foil

Front Facing: The front surface features a tapered edge gypsum-based plasterboard finish that accepts dryjointing compounds and plaster skim coatings.

Reverse Facing: The rear of Kingspan K118 incorporates a low emissivity composite foil layer, factory-bonded to the insulation core for enhanced thermal performance.

Applications: Internal Walls ǀ Roofs ǀ Ceilings

BBA Certified: Yes (no. 16/5299)

Vapour Control Layer: Yes, built in

Fixing method: Dot and Dab ǀ Mechanically Fixed

Decoration: Skim plaster

Features: Premium performance insulated plasterboard

About

This rigid thermoset phenolic insulation board delivers outstanding thermal performance at 0.019 W/mK whilst functioning as insulation, drylining, and vapour control simultaneously. The product resists air infiltration and water vapour transmission, enabling rapid heating response. Manufactured with zero ODP blowing agents and low GWP, it suits new build, retrofit, and refurbishment applications. Installation is straightforward, and the material is non-deleterious.

Applications

The 92.5mm board is suitable for cavity masonry wall constructions, solid walls, timber frame systems, ceilings, metal furring, mechanical fixing to masonry, and both horizontal and sloping ceiling linings.

Benefits of Kooltherm

By choosing the slim profile of Kingspan k118 insulated plasterboard, you preserve valuable internal space, increasing lettable floor area and enhancing property value and appeal to occupants.

Sustainability

Kingspan integrates Kooltherm into its Planet Passionate sustainability commitment.

The core

The 92.5mm K118 insulated plasterboard features a high-performance rigid thermoset phenolic core manufactured without fibres. The blowing agent used has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

About Kingspan Insulation

Kingspan Insulation Ltd is part of Kingspan Group plc, a leading European construction products manufacturer. The Kingspan insulation Group was founded in the late 1960s and operates as a publicly listed company headquartered in Kingscourt, County Cavan, Ireland.

Info

Browse our full Kingspan range and filter by thickness or coverage using the left-hand navigation. For project suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the lowest UK Insulation prices.