37.5mm Kingspan Kooltherm K118 Insulated Plasterboard

37.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for mechanically fixed and adhesively bonded insulated drylining applications. This innovative product enables slim wall constructions whilst delivering outstanding thermal performance with a thermal conductivity of 0.019 W/mK. The all-in-one design combines insulation, drylining, and vapour control in a single board, suitable for application to solid stonework and brickwork, whether pre-lined or not.

The 37.5mm Kooltherm Kingspan delivers numerous advantages for construction projects. As one of the thinnest Internal Wall Insulation (IWI) solutions available, it proves invaluable where preserving internal space is essential, and for buildings where external insulation is not feasible. The integrated all-in-one design provides insulation, drylining, and vapour control functionality, whilst supporting rapid response heating systems. Its lightweight nature ensures straightforward transportation, handling, and installation on site.

Properties

Model: 37.5mm K118

Thickness: 37.5mm

Pack Quantity: 21 sheets

Pack Weight: 572.75kg

Dimensions: 2,400mm x 1,200mm x 37.50mm (25mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 1.30m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 60.48m2

Insulation Material: 37.5mm 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 37.5mm 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.

Pack Quantity: 21 sheets

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 37.5mm phenolic insulation delivers exceptional thermal performance at 0.019 W/mK and serves as insulation, drylining, and vapour control in one integrated product. The board facilitates responsive heating systems, prevents air infiltration, and controls water vapour transmission. Installation is straightforward, making it ideal for new build, retrofit, and refurbishment schemes. Manufactured using a blowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), it represents a non-deleterious choice for sustainable construction.

Applications

Kingspan 37.5mm suits 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 substrates, and ceiling linings for both horizontal and sloping surfaces.

Benefits of Kooltherm

Adopting Kingspan k118 insulated plasterboard slim profile maximises usable floor space within properties, enhancing rental value and appeal to prospective occupants or purchasers.

Sustainability

Kingspan has integrated Kooltherm into its Planet Passionate sustainability programme.

The core

Kingspan 37.5mm K118 insulated plasterboard features a high-performance, rigid, thermoset, fibre-free phenolic insulation core, produced with a blowing agent offering zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

About Kingspan Insulation

Kingspan Insulation Ltd operates as part of 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 from headquarters in Kingscourt, County Cavan, Ireland.

Info

Browse our full Kingspan range and refine by thickness or coverage using the left-hand filters. For project-specific advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK Insulation prices.