62.5mm Kingspan Kooltherm K118 Insulated Plasterboard

62.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for mechanically fixed and adhesively bonded internal drylining applications. This all-in-one system combines insulation, drylining, and vapour control in a single board, delivering exceptional thermal performance with a thermal conductivity of 0.019 W/mK. The slim profile construction works on solid stonework and brickwork, whether previously lined or unlined.

The 62.5mm 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 drylining and vapour control layer streamline installation, whilst the lightweight design simplifies handling and fixing.

Properties

Model: 62.5mm K118

Thickness: 62.5mm

Pack Quantity: 12 sheets

Pack Weight: 348.40kg

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: 34.56m2

Insulation Material: 62.5mm 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 62.5mm 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 phenolic insulation board combines insulation, drylining, and vapour control in one integrated system. With a thermal conductivity of 0.019 W/mK, it provides rapid response heating, excellent air tightness, and effective moisture resistance. The board is straightforward to install and suitable for new build, retrofit, and refurbishment projects. Manufactured using a blowing agent with zero ODP and low GWP, it represents a responsible choice for construction applications.

Applications

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

Benefits of Kooltherm

The compact design of Kingspan k118 insulated plasterboard preserves valuable internal space, increasing lettable floor area and enhancing property value and appeal to occupants.

Sustainability

Kooltherm is part of our Planet Passionate sustainability commitment.

The core

Kingspan 62.5mm K118 insulated plasterboard features a high-performance, rigid, thermoset, fibre-free phenolic insulation core. The manufacturing process uses 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 company based in Kingscourt, County Cavan, Ireland.

Info

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