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Kingspan Kooltherm K118 57.5mm (pack of 14 sheets)

57.5mm Kingspan Kooltherm K118 Insulated Plasterboard - Dot and Dab & Mechanically Fixed Dry-Lining (pack of 14)
57.5mm Kingspan Kooltherm K118 Insulated Plasterboard - Dot and Dab & Mechanically Fixed Dry-Lining (pack of 14)
57.5mm Kingspan Kooltherm K118 Insulated Plasterboard - Dot and Dab & Mechanically Fixed Dry-Lining (pack of 14)
57.5mm Kingspan Kooltherm K118 Insulated Plasterboard - Dot and Dab & Mechanically Fixed Dry-Lining (pack of 14)
Kingspan Kooltherm K118 57.5mm (pack of 14 sheets)
  • 57.5mm Kingspan Kooltherm K118 (previously K18 and K17)
  • Insulation, dry-lining and vapour control in one board
  • Easy to handle and install - Ideal for new build, retrofit and refurbishment
  • Standards & Approvals: ISO 9001 - ISO 14001 - BBA Certificate 16/5299
  • Premium performance insulated plasterboard thermal conductivity of 0.019 W/mK
Estimated delivery:
In Stock
£ 2,197.13
Ex VAT: £ 1,830.94
  • Brand: Kingspan®
  • Model: 57.5mm K118
  • Weight: 399.88kg
  • Dimensions: 2,400mm x 1,200mm x 57.50mm
  • SKU: 57.5mm
  • Product code: P1-1121
  • MPN: 57.5mm Kingspan Kooltherm K118

Options available

The 57.5mm Kooltherm K118 Insulated Plasterboard by Kingspan is an insulated plasterboard, a premium performance, lower lambda internal wall insulation with an advanced fibre-free rigid thermoset phenolic insulation core.

K118 Kingspan Kooltherm is a highly durable, premium performance thermal insulated plasterboard with a certified thermal conductivity (lambda-value) of 0.019 W/mK designed to save money by reducing the heat loss from buildings.

57.5mm Kooltherm K118 Kingspan (previously Kingspan Kooltherm K18 and K17) provides high-levels of insulation, dry-lining and vapour control layer in one easily applicable 2400mm x 1200mm (8x4) insulated plasterboard sheets.

These easy to install and decorate premium insulation panels are suitable for new build and refurbishment projects.

The insulation core and facings used in the manufacture of Kingspan K118 resist attack by mould, fungi, bacteria and microbial growth.

Kingspan Kooltherm K118 is a high-performance rigid thermoset fibre-free phenolic insulation manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

The front facing of Kooltherm K118 is a 12.5mm tapered edge gypsum plasterboard which easily accepts dry jointing materials and plaster skim finish.

The reverse facing of Kingspan Kooltherm K118 is a low emissivity composite foil, autohesively bonded to the phenolic insulation core during manufacture. 

This reflective, low emissivity surface improves the thermal resistance of any unventilated cavity adjacent to the product.

If correctly installed, Kingspan Kooltherm K118 can have an indefinite life (durability depends on the supporting structure).




Width: 1200mm

Length: 2400mm

Pack Quantity: 14

Pack Coverage: 40.32m2

R-Value: 2.55m2K/W

Thermal Conductivity: 0.019W/mK

Compressive Strength: >100 (kPa)

Reaction to Fire: Euroclass C-s1, d0


Key points:

 · Premium performance rigid thermoset phenolic insulation.

 · Thermal conductivity (lambda value) of 0.019 W/mK!

 · Insulation, dry-lining and vapour barrier in one board.

 · Allows quick response heating.

 · Unaffected by air infiltration.

 · Standard size 2400mm x 1200mm (8 x 4) boards.

 · Resistant to the passage of water vapour.

 · Easy to handle and install.

 · Ideal for new build, retrofit and refurbishment.

 · Non-deleterious material.

 · Manufactured with a blowing agent that has zero ODP and low GWP.


Resistance to Solvents, Fungi and Rodents:

The insulation core is resistant to short-term contact with petrol and with most dilute acids, alkalis and mineral oils. 

However, it is recommended that any spills be cleaned off fully before the boards are installed. 

Ensure that safe methods of cleaning are used, as recommended by the suppliers of the spilt liquid. 

The insulation core is not resistant to some solvent-based adhesive systems, particularly those containing methyl ethyl ketone. 

Adhesives containing such solvents should not be used in association with this product. 

Damaged boards or boards that have been in contact with harsh solvents or acids should not be used. 


Water Vapour Resistance:

The non-plasterboard component of the product typically achieves a resistance far greater than 100 MNs/g, when tested in accordance with BS EN 12086: 2013 .

For the purposes of calculation of condensation risk, the resistivity of the plasterboard component of the product should be taken as 50 MNs/gm.


Standards and approvals:

 · BBA Certificate 16/5299.

 · ISO 9001: 2015 (Quality Management Systems. Requirements).

 · ISO 14001: 2015 (Environmental Management Systems. Requirements).

 · BS OHSAS 18001: 2007 (Occupational Health & Safety Management Systems. Requirements).

 · ISO 50001: 2011 (Energy Management Systems. Requirements with guidance for use). 


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 


*Special Product - Non returnable cancelable.

Board covarage 40.32 m2
Compressive Strength >100 (kPa)
Length 2400mm
Material Phenolic core ǀ Gypsum plasterboard
Pack Coverage 40.32m2
Pack Quantity 14
R-Value 2.55m2K/W
Thermal Conductivity 0.019W/mK
Thickness 57.5mm
Width 1200mm
Fire Classification Euroclass C-s1, d0
Coverage 40.32m2
Finish Kraft facing ǀ Composite foil
Quantity 14
Shipping method Articulated Vehicle
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
ETA Notification Yes
Features Unbeatable insulated plasterboard
Manufacturer Kingspan Kooltherm K118®

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
57.5mm Kingspan Kooltherm K118 Insulated Plasterboard - Dot and Dab & Mechanically Fixed Dry-Lining (pack of 14)
Kingspan Kooltherm K118 57.5mm (pack of 14 sheets)
£ 2,197.13