Kingspan Insulation Kooltherm K110 phenolic soffit board Celotex Insulation

Kingspan Kooltherm K110

Premium performance rigid Phenolic soffit lining insulation board.

Replaces Kingspan Kooltherm K10.

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

Unaffected by air infiltration. Resistant to the passage of water vapour.

Ideal for new build and refurbishment. Easy to handle and quick to install.

Premium performance rigid thermoset fibre-free phenolic insulant.

BBA certified and LABC registered.

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: 65mm, 75mm and 85mm.

The following thicknesses are manufactured to order and may have minimum order requirements: 90mm, 100mm, 110mm and 120mm.

Product Information

General information about Kingspan Kooltherm K110

Product Application

Structural ceiling (soffit) insulating board

Kingspans premium performance ‘lower-lambda’ value phenolic foam insulation board, Kooltherm K110, is suitable for semi-exposed concrete floor decks in new and existing car parks, storage areas, loading bays and similar areas beneath habitable domestic buildings.

Product Make-up


The core of Kingspan Kooltherm K110 Soffit Board is a premium performance fibre-free rigid thermoset phenolic insulant.


Faced with a low emissivity composite foil on the outer facing while the inner face is a glass tissue based facing, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 65mm to 120mm
Board Length 2.4m
Board Width 1.2m
Board Edge Square

Product Prices

Buy Kingspan Kooltherm K110

Product ex-VAT inc-VAT
Kingspan Kooltherm K110 70mm, 4 x 1.2x2.4m = 11.52m² £331.87 £398.24
Kingspan Kooltherm K110 75mm, 4 x 1.2x2.4m = 11.52m² £333.78 £400.53
Kingspan Kooltherm K110 85mm, 3 x 1.2x2.4m = 8.64m² £279.07 £334.88

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
Nominal Density 35 kg/m³
Vapour Resistance > 41.6 MNs/gm BS EN 12086: 1997 / I.S. EN 12086: 1998
Product Thickness Thermal Resistance kg/m²
Kingspan K110 60mm 60mm 3.16 m²K/W 2.85 kg/m²
Kingspan K110 65mm 65mm 3.42 m²K/W 3.09 kg/m²
Kingspan K110 70mm 70mm 3.68 m²K/W 3.09 kg/m²
Kingspan K110 75mm 75mm 3.95 m²K/W 3.66 kg/m²
Kingspan K110 80mm 80mm 4.21 m²K/W 3.87 kg/m²
Kingspan K110 85mm 85mm 4.47 m²K/W 4.10 kg/m²
Kingspan K110 90mm 90mm 4.74 m²K/W 4.14 kg/m²
Kingspan K110 100mm 100mm 5.26 m²K/W 4.71 kg/m²
Kingspan K110 110mm 110mm 5.79 m²K/W 5.19 kg/m²
Kingspan K110 120mm 120mm 6.32 m²K/W 5.63 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.