Kingspan Kooltherm K118 62.5mm Insulated Plasterboard

62.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for both mechanically fixed and adhesively bonded internal drylining applications. This innovative product delivers exceptional thermal performance with a thermal conductivity of 0.019 W/mK, enabling slim wall constructions without compromising insulation quality. The integrated design combines insulation, drylining, and vapour control in one board, suitable for solid stonework and brickwork with or without existing linings.

The 62.5mm Kooltherm Kingspan offers several key advantages: it ranks among the thinnest Internal Wall Insulation (IWI) solutions available, making it ideal for space-constrained buildings and structures unsuitable for external insulation. The all-in-one construction provides integrated insulation, drylining, and vapour control capabilities. Its lightweight nature simplifies transport, handling, and installation, whilst enabling rapid response heating systems.

Properties

Model: 62.5mm K118

Thickness: 62.5mm

Pack Quantity: 1 sheet

Pack Weight: 29.03kg

Dimensions: 2,400mm x 1,200mm x 62.50mm (50mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 2.60m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 2.88m2

Insulation Material: 62.5mm Kooltherm K118 is a premium-grade, low-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 readily accepts dryjointing compounds and plaster skim coats.

Reverse Facing: The reverse side of Kingspan K118 incorporates a low emissivity composite foil layer, 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, built in

Fixing method: Dot and Dab ǀ Mechanically Fixed

Decoration: Skim plaster

Features: Premium performance insulated plasterboard

About

This premium rigid thermoset 62.5mm phenolic insulation delivers a thermal conductivity of 0.019 W/mK and provides integrated insulation, drylining, and vapour control functionality. The board prevents air infiltration, resists water vapour transmission, and facilitates rapid response heating systems. Installation is straightforward, and the product suits new build, retrofit, and refurbishment projects. Manufactured with a zero ODP and low GWP blowing agent, it represents a non-deleterious material choice.

Applications

Kingspan 62.5mm performs effectively in diverse construction scenarios, including cavity masonry wall constructions, solid walls, timber frame walls, ceilings, metal furring systems, timber framing and batten fixing, direct mechanical fixing to masonry substrates, and both horizontal and sloping ceiling linings.

Benefits of Kooltherm

By adopting the Kingspan K118 insulated plasterboard slim profile design, you preserve valuable internal floor space, increasing lettable area and enhancing property value and appeal to prospective buyers and tenants.

Sustainability

Kingspan has incorporated Kooltherm into its Planet Passionate sustainability programme.

The core

Kingspan 62.5mm 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 the Kingspan Group plc, a leading European manufacturer of construction products. The Kingspan insulation Group was founded in the late 1960s and operates as a publicly listed group with headquarters 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.