57.5mm Kingspan Kooltherm K118 Insulated Plasterboard

57.5mm K118 by Kingspan Kooltherm is a high-performance insulated plasterboard engineered for mechanically fixed and adhesively bonded drylining applications. This all-in-one solution 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 creating slim wall constructions on solid stonework and brickwork, it works with or without existing linings.

The 57.5mm Kooltherm Kingspan offers several key advantages. As one of the thinnest Internal Wall Insulation (IWI) options available, it maximises usable floor space in buildings where external insulation isn't feasible. The integrated design eliminates the need for separate products, whilst its lightweight construction ensures straightforward handling and installation. Quick-response heating capability and excellent air-tightness make it particularly effective for retrofit and refurbishment work.

Properties

Model: 57.5mm K118

Thickness: 57.5mm

Pack Quantity: 1 sheet

Pack Weight: 28.53kg

Dimensions: 2,400mm x 1,200mm x 57.50mm (45mm Phenolic PIR bonded to 12.5mm Plasterboard)

Length: 2400mm

Width: 1200mm

Compressive Strength: >100 (kPa)

Material: Phenolic core ǀ Gypsum plasterboard

R-Value: 2.40m2K/W

Thermal Conductivity: 0.019 W/mK across all thicknesses.

Fire Classification: Euroclass C-s1, d0

Coverage: 2.88m2

Insulation Material: 57.5mm 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 57.5mm 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 delivers outstanding thermal performance at just 57.5mm thick. Functioning as insulation, drylining, and vapour control simultaneously, it prevents air leakage and resists moisture transmission. The product suits new builds, retrofits, and refurbishment projects equally well. Manufactured using a zero-ODP, low-GWP blowing agent, it represents a responsible choice for environmentally conscious construction.

Applications

This 57.5mm board performs well in cavity masonry wall constructions, solid walls, timber frame walls, ceilings, metal furring systems, and mechanical fixing directly to masonry. It accommodates both horizontal and sloping ceiling applications with equal effectiveness.

Benefits of Kooltherm

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

Sustainability

Kingspan has incorporated Kooltherm into its Planet Passionate sustainability commitment.

The core

The 57.5mm 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, it meets stringent environmental standards.

About Kingspan Insulation

Kingspan Insulation Ltd is part of Kingspan Group plc, a leading European construction products manufacturer. Established in the late 1960s, the Kingspan insulation Group is a publicly traded company based in Kingscourt, County Cavan, Ireland.

Info

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