82.5mm Kingspan Kooltherm K118 Insulated Plasterboard

The 82.5mm K118 from Kingspan Kooltherm is a high-performance insulated plasterboard engineered for both mechanically fixed and adhesively bonded internal drylining systems. This product delivers outstanding thermal performance with a thermal conductivity of 0.019 W/mK, enabling slim wall constructions without compromising insulation efficiency. Combining insulation, drylining, and vapour control in one board, it works effectively on solid stonework and brickwork, whether pre-lined or not.

The 82.5mm Kooltherm Kingspan offers several key advantages. As one of the thinnest Internal Wall Insulation (IWI) solutions available, it maximises usable floor space in properties where external insulation is impractical. The integrated design provides insulation, drylining, and vapour control simultaneously, whilst its lightweight nature simplifies transport, handling, and installation on site.

Properties

Model: 82.5mm K118

Thickness: 82.5mm

Pack Quantity: 9 sheets

Pack Weight: 307.63kg

Dimensions: 2,400mm x 1,200mm x 82.50mm (70mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 3.65m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 25.92m2

Insulation Material: 82.5mm Kooltherm K118 is a premium performance, lower-lambda rigid thermoset phenolic pir insulation.

Finish: Kraft facing ǀ Composite foil

Front Facing: The front facing of 82.5mm K118 is a tapered edge gypsum based plasterboard which readily accepts dryjointing materials and plaster skim.

Reverse Facing: The reverse facing of Kingspan K118 is a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Applications: Internal Walls ǀ Roofs ǀ Ceilings

BBA Certified: Yes (no. 16/5299)

Vapour Control Layer: Yes, build in

Fixing method: Dot and Dab ǀ Mechanically Fixed

Decoration: Skim plaster

Features: Premium performance insulated plasterboard

About

This premium rigid thermoset 82.5mm phenolic insulation provides a thermal conductivity of 0.019 W/mK and serves as insulation, drylining, and vapour control in a single product. The board enables rapid heating response, prevents air infiltration, and resists moisture vapour transmission. Installation is straightforward, and the product suits new build, retrofit, and refurbishment work. Manufactured using a blowing agent with zero ODP and low GWP, it represents a non-deleterious material choice.

Applications

Kingspan 82.5mm performs well across numerous construction scenarios, including cavity masonry wall constructions, solid walls, timber frame walls, ceilings, metal furring systems, fixing to timber framing and battens, mechanical fixing directly to masonry, and ceiling linings for both horizontal and sloping surfaces.

Benefits of Kooltherm

The slim profile of Kingspan K118 insulated plasterboard preserves internal space, increasing lettable floor area and enhancing property value and appeal to buyers and tenants alike.

Sustainability

Kingspan has incorporated Kooltherm into its Planet Passionate sustainability programme.

The core

Kingspan 82.5mm K118 insulated plasterboard features a high-performance, rigid, thermoset, fibre-free phenolic insulation core. The core is manufactured using a blowing agent with 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 based in Kingscourt, County Cavan, Ireland.

Info

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