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 internal wall applications. This all-in-one solution delivers insulation, drylining, and vapour control in a single board, achieving exceptional thermal performance with a conductivity rating of 0.019 W/mK. The slim profile enables space-efficient wall constructions whilst maintaining superior insulation capabilities, making it suitable for solid stonework and brickwork surfaces, whether pre-lined or unlined.

The 37.5mm Kooltherm Kingspan offers distinct advantages for projects where internal space is at a premium. As one of the thinnest Internal Wall Insulation (IWI) options available, it suits buildings where external insulation is impractical. The integrated drylining and vapour barrier eliminate the need for additional layers, whilst the lightweight construction simplifies handling and installation on site.

Properties

Model: 37.5mm K118

Thickness: 37.5mm

Pack Quantity: 1 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.

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 outstanding thermal resistance with practical multi-functionality. With a thermal conductivity of 0.019 W/mK, it provides insulation, drylining, and integrated vapour control without additional components. The board prevents air leakage and resists moisture vapour transmission, whilst remaining straightforward to cut, fit, and finish. Ideal for new builds, retrofits, and refurbishment schemes, it's manufactured using a zero ODP, low GWP blowing agent.

Applications

The 37.5mm Kingspan product suits diverse construction scenarios including cavity masonry wall systems, solid wall constructions, timber frame assemblies, ceiling installations, metal furring arrangements, direct mechanical fixing to masonry, and both horizontal and sloped ceiling linings.

Benefits of Kooltherm

Deploying the slim profile of Kingspan k118 insulated plasterboard maximises usable floor area within properties, boosting lettable space, market value, and appeal to occupants and investors alike.

Sustainability

Our commitment to environmental responsibility is reflected through Kooltherm's inclusion in our Planet Passionate sustainability programme.

The core

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

About Kingspan Insulation

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

Info

Explore our full Kingspan range and refine by thickness or coverage using the filters on the left. For advice on product suitability for your project or to request a bulk discount quotation, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.