72.5mm Kingspan Kooltherm K118 Insulated Plasterboard

72.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for mechanically fixed and adhesively bonded insulated drylining applications. This all-in-one board delivers outstanding thermal performance with a conductivity of 0.019 W/mK, enabling slim wall constructions whilst providing comprehensive insulation, drylining, and vapour control. Suitable for solid stonework and brickwork, whether existing linings are present or not.

The 72.5mm Kooltherm Kingspan offers significant advantages for internal wall applications. As one of the thinnest Internal Wall Insulation (IWI) solutions available, it maximises usable floor space in buildings where external insulation is impractical. The integrated design combines insulation, drylining, and vapour control in a single product. Its lightweight nature simplifies handling, transport, and installation on site.

Properties

Model: 72.5mm K118

Thickness: 72.5mm

Pack Quantity: 1 sheet

Pack Weight: 30.04kg

Dimensions: 2,400mm x 1,200mm x 72.50mm ( 60mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 3.15m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 2.88m2

Insulation Material: 72.5mm 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 72.5mm 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 72.5mm phenolic insulation delivers exceptional thermal performance at 0.019 W/mK whilst serving as insulation, drylining, and vapour control in a single integrated product. The board enables rapid heating response, prevents air infiltration, and resists water vapour transmission. Installation is straightforward, making it ideal for new build, retrofit, and refurbishment schemes. Manufactured using a zero ODP, low GWP blowing agent, this non-deleterious material supports sustainable construction practices.

Applications

Kingspan 72.5mm performs well across diverse construction scenarios including cavity masonry wall constructions, solid walls, timber frame walls, ceilings, metal furring systems, fixing to timber framing and battens, direct mechanical fixing to masonry, and ceiling linings for both horizontal and sloping surfaces.

Benefits of Kooltherm

The slim profile of Kingspan k118 insulated plasterboard preserves valuable internal space, increasing lettable floor area and enhancing property value and appeal to prospective tenants or buyers.

Sustainability

Kingspan has incorporated Kooltherm into its Planet Passionate sustainability commitment.

The core

Kingspan 72.5mm K118 insulated plasterboard features a high-performance, rigid, thermoset, fiber-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 refine by thickness or coverage using the filters on the left. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.