Kingspan Kooltherm K118 Insulated Plasterboard

Kooltherm K118 is an advanced insulated plasterboard for mechanically fixed and adhesively bonded insulated drylining. It allows for extremely thin-walled construction with an insulation component that delivers a thermal conductivity of 0.019 W/mK, providing insulation, drylining and vapour control in one board. It can be used with solid stonework and brickwork, with or without an existing lining. Applications:

• Insulated plasterboard for mechanically fixed and adhesively bonded insulated drylining.

Important details about this product

• Length: 2400mm
• Width: 1200mm
• Lambda: 0.019W/mK
• Fire Performance: Insulation core achieves Euroclass B-s1,d0. Plasterboard element achieves Euroclass A2-s1,d0.
• Weight: Approximately1 2.63 kg/m² at a thickness of 50 mm insulation plus 12.5 mm plasterboard.
• Material: Kooltherm K118 is a premium performance, lower-lambda rigid thermoset phenolic insulation.
• Facings: The front facing is a tapered edge gypsum based plasterboard which readily accepts dryjointing materials and plaster skim. The reverse facing is a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Key Features & Benefits

• Excellent thermal performance with a thermal conductivity of 0.019 W/m.K, reducing the thickness of insulation required to hit the target U-value.
• One of the thinnest commonly used Internal Wall Insulation (IWI) – ideal for retaining internal space within buildings
• Ideal for buildings that can’t be insulated on the outside
• Insulation, drylining and vapour control in one board
• Less likely to need additional insulated plasterboard due to excellent thermal performance
• Allows quick response heating

Kingspan Kooltherm K118 Insulated Plasterboard Pack Sizes & Coverage:

• 37.5mm – 21 Sheets – 60.48sq.m
• 42.5mm – 18 Sheets – 51.84sq.m
• 52.5mm – 15 Sheets – 43.2sq.m
• 62.5mm – 12 Sheets – 34.56sq.m
• 72.5mm – 11 Sheets – 31.68sq.m

Do you offer Free Delivery?

Yes! On most insulation orders over £400 excluding VAT, we can offer free delivery*. 

Delivery depends on stock availability and location. If stock is not available at your local branch and must be delivered from another branch, this may affect lead time or delivery charges. In this case, one of our advisors will contact you to confirm any changes. 

You can also send your enquiry via Contact Page or WhatsApp, and we will calculate the costs for you. We always aim to have your order travel the shortest distance possible to ensure free or the most economical delivery option. 

Orders below £400 excluding VAT are usually subject to a delivery fee of £50 excluding VAT. 

*Orders into central London (inside the North Circular and South Circular) will be charged on orders up to £1,000 + VAT due to increased shipping costs and congestion charges. Orders must also be above £350 + VAT to be processed.

Where do you deliver to?

We can deliver to 95% of the UK, using our branches across England, Wales, and Scotland. To check if you are in our delivery area, see the map or your postcode. 

London postcodes: BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TW, UB, W, WC, WD. 

Other postcodes: AL, B, BA*, BB, BD, BH*, BN, BS, CA, CB, CM, CO, CT, CV, CW, DA, DD*, DE, DG*, DH, DL, DN, DT*, DY, EH*, EX*, FK*, FY, G, GL*, GU, HD, HG, HP, HU, HX, IP, KA*, KY*, L, LA, LE, LL, LN, LS, LU, M, ME, MK, ML, NE, NG, NN, NR, OL, OX*, PA*, PE*, PH*, PL*, PO*, RG, RH, RM, S, SG, SK, SL, SN*, SO, SP*, SR, SS, ST, SY, TA*, TD*, TF, TN, TQ*, TS, WA, WF, WN, WR, WS, WV, YO. 

Limited areas (PO – Mainland only; BA, BH, DD, DG, DT, EX,  EH, FK, GL, KA, KY, OX, PA, PE, PH, PL, SN, SP, TA, TD, TQ & PL) may have restricted delivery coverage depending on distance from the branch and order size.

Where will you deliver my order to?

All deliveries are kerbside only. It is your responsibility to move items from the kerb onto your property. The courier decides where the order is left, so please ensure there is ample space to offload.

Delivery access and site restrictions

These items are typically delivered on large 18T or 26T rigid lorries, approximately 10–12 meters long, 4 meters high, 2.6 meters wide, carrying 12–14 pallets.

Please inform us of any access restrictions or site issues in advance; failure to do so may result in extra delivery charges.

When do you dispatch orders?

If your order is placed before 12:00 PM, we aim to process and dispatch it on our lorries the next working day. Occasionally, lorries may be full, or stock may need to be brought in from another branch, which can extend delivery up to 10 working days. Some areas are subject to set delivery days due to distance from the local branch.

Please ensure to leave a mobile number so that we can contact you with your delivery date once we have received confirmation from the local branch. This also allows ourselves or the delivery driver to contact you if there are any issues with your delivery.

Why do we need your contact number?

It is essential to provide a mobile number so we or the delivery driver can contact you if there are any issues. For orders of this nature, we may contact you after ordering online to discuss delivery options, site restrictions, or offloading requirements.

How much will my delivery cost?

For orders over £400 excluding VAT, we can offer free delivery*. 

Delivery costs vary depending on the product and delivery location. When you add items to your basket and proceed to checkout, the delivery price will be displayed. We keep delivery costs as low as possible and only pass on the rates charged by our delivery partners.

How long will my delivery take?

Each product page shows the usual lead time below the “Add to Basket” button. These times are a guide only, and we aim to deliver your items as quickly as possible.