Kingspan Insulation Kooltherm K118 phenolic thermal laminate board Celotex Insulation

Kingspan Kooltherm K118

Premium performance rigid Phenolic insulated plasterboard.

Replaces Kingspan Kooltherm K17 & K18.

Insulation, dry–lining and vapour control in one board.

New lower Lambda Value (Thermal Conductivity) 0.019 W/mK... The most thermally efficient commonly used insulating board.

Suitable for both mechancial fixing and dot & dab adhesive bonding.

Premium performance rigid thermoset fibre-free phenolic insulant.

Thicknesses and Availability:

Available in most popular thicknesses from the manufacturer; short lead-times apply as we may need to get the products in from Kingspan before delivering to site.

This Kooltherm Range includes the following readily available product thicknesses: 32.5mm, 37.5mm, 42.5mm, 52.5mm, 57.5mm, 62.5mm and 72.5mm.

The following thicknesses are manufactured to order and may have minimum order requirements: 67.5mm, 82.5mm, 87.5mm and 92.5mm

Product Information

General information about Kingspan Kooltherm K118

Product Application

Dry-lining thermal laminate board

Kingspans premium performance 'lower-lambda' value phenolic foam board bonded to 12.5mm plasterboard, Kooltherm K118, is suitable for use in wall applications where it is mechanically fixed to timber frames or steel wall linings as well as adhesive bonded (dot and dab) to brick, block, or concrete walls.

Product Make-up


The core of Kingspan Kooltherm K118 Insulated Plasterboard is a premium performance fibre-free rigid thermoset phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)


Faced with a 12.5mm tapered edge gypsum based plasterboard on the front facing while the hidden face is a perforated low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 32.5mm to 92.5mm
Board Length 2.4m
Board Width 1.2m
Board Edge Square / Tapered edge plasterboard

Product Prices

Buy Kingspan Kooltherm K118

In some case, we may be able to split the pallets of Kingspan Kooltherm K118, however, this will be depot dependant. Please contact me on 01903 899 898 or via our contact us form with your requirements, so that I can check in with the relevant depot to see what options are available.

Product ex-VAT inc-VAT
Kingspan Kooltherm K118 37.5mm (25+12.5mm), 21 x 1.2x2.4m = 60.48m² £1,346.53 £1,615.83
Kingspan Kooltherm K118 42.5mm (30+12.5mm), 18 x 1.2x2.4m = 51.84m² £1,190.10 £1,428.12
Kingspan Kooltherm K118 52.5mm (40+12.5mm), 15 x 1.2x2.4m = 43.2m² £1,050.67 £1,260.80
Kingspan Kooltherm K118 57.5mm (45+12.5mm), 14 x 1.2x2.4m = 40.32m² £1,049.82 £1,259.78
Kingspan Kooltherm K118 62.5mm (50+12.5mm), 12 x 1.2x2.4m = 34.56m² £959.15 £1,150.98
Kingspan Kooltherm K118 72.5mm (60+12.5mm), 11 x 1.2x2.4m = 31.68m² £923.83 £1,108.59

Limited stock of the most popular boards sizes may be held at some of our larger depots.

Where products need to be brought in from Kingspan, please allow approx. 1 week for delivery on stocked items and up to 3 weeks on made to order thicknesses. While Kingspan keep the majority of the popular thicknesses in stock, less popular thicknesses may carry a minimum order level.

Kingspan reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.019 W/mK
Compressive Strength 100 kPa at 10% compression BS EN 826:2013
Vapour Resistance > 100 MNs/gm BS EN 12086: 1997 / I.S. EN 12086: 1998
Nominal Density 35 kg/m³
Product Thickness Thermal Resistance kg/m²
Kingspan K118 37.5mm 37.5mm 1.30 m²K/W 11.57 kg/m²
Kingspan K118 42.5mm 42.5mm 1.55 m²K/W 11.87 kg/m²
Kingspan K118 52.5mm 52.5mm 2.10 m²K/W 12.21 kg/m²
Kingspan K118 57.5mm 57.5mm 2.40 m²K/W 12.41 kg/m²
Kingspan K118 62.5mm 62.5mm 2.60 m²K/W 12.91 kg/m²
Kingspan K118 72.5mm 72.5mm 3.15 m²K/W 13.25 kg/m²
Kingspan K118 82.5mm 82.5mm 3.65 m²K/W 13.81 kg/m²
Kingspan K118 92.5mm 92.5mm 4.20 m²K/W 14.21 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.

Kingspan Videos

How to install insulated plasterboard, adhesive bonded
How to install insulated plasterboard, mechanically fixed to battens