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 internal drylining solutions. This innovative product combines insulation, drylining, and vapour control in a single board, delivering exceptional thermal performance with a conductivity rating of 0.019 W/mK. Ideal for solid stonework and brickwork applications, it works effectively on existing surfaces or bare walls without additional preparation.

The 72.5mm 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 isn't feasible. The integrated drylining and vapour barrier eliminate the need for separate layers, whilst its lightweight construction simplifies handling, transportation, and installation on site.

Properties

Model: 72.5mm K118

Thickness: 72.5mm

Pack Quantity: 11 sheets

Pack Weight: 330.53kg

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: 31.68m2

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 surface features a tapered edge gypsum plasterboard that accepts dryjointing compounds and plaster skim finishes readily.

Reverse Facing: The rear of Kingspan K118 incorporates a low emissivity composite foil layer, autohesively bonded to the core during production.

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 premium rigid thermoset phenolic insulation board delivers outstanding thermal performance at 0.019 W/mK whilst serving triple duty as insulation, drylining, and vapour control. The product enables rapid heating response, prevents air infiltration, and resists moisture vapour transmission. Installation is straightforward, making it suitable for new construction, renovation, and refurbishment work. Manufactured using a zero ODP, low GWP blowing agent, it represents a responsible choice for environmentally conscious projects.

Applications

The 72.5mm format suits diverse construction scenarios including cavity masonry wall systems, solid wall construction, timber frame assemblies, ceiling installations, metal furring arrangements, timber battens, direct mechanical fixing to masonry, and horizontal or sloped ceiling linings.

Benefits of Kooltherm

Deploying the slim profile of Kingspan k118 insulated plasterboard preserves valuable internal space, increasing lettable area and enhancing property value and market appeal.

Sustainability

Kingspan has incorporated Kooltherm into its Planet Passionate sustainability commitment.

The core

The 72.5mm K118 insulated plasterboard features a high-performance, rigid, thermoset, fibre-free phenolic core manufactured with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP) blowing agents.

About Kingspan Insulation

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

Info

Browse our complete Kingspan range and refine by thickness or coverage using the filters. For product suitability advice or bulk quotations, contact our team on +4402038839057, email sales@insulationbee, or use Live Chat for the lowest UK Insulation prices.