Kingspan Insulation Kooltherm K107 phenolic pitch roof board Celotex Insulation

Kingspan Kooltherm K107

Premium performance rigid Phenolic pitched roof board.

Replaces Kingspan Kooltherm K7.

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

Used for insulating pitched roofs at rafter level, between ceiling joists, cold pitched and flat roofs.

Premium performance rigid thermoset fibre-free phenolic insulant.

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

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 thickness: 25mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 100mm, 120mm and 140mm.

The folllowing thicknesses are manufactured to order: 90mm, 110mm, 130mm and 150mm; these may carry minimum order levels.

Product Information

General information about Kingspan Kooltherm K107

Product Application

Pitched roof insulating board

Kingspans premium performance 'lower-lambda' value phenolic foam board, Kooltherm K107, is suitable for use in above, between or below rafter level applications as well as dwarf walls and loft floors.

Product Make-up


Kingspan Kooltherm K107 Pitched Roof Board is a premium performance fibre-free rigid thermoset phenolic insulant.


Faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture. This reflective, low emissivity surface improves the thermal resistance of any unventilated cavity adjacent to the board.

Product Properties

Thickness 25mm to 150mm
Board Length 2.4m
Board Width 1.2m
Board Edge Square

Product Prices

Buy Kingspan Kooltherm K107

Product ex-VAT inc-VAT
Kingspan Kooltherm K107 25mm, 12 x 1.2x2.4m = 34.56m² £420.85 £505.02
Kingspan Kooltherm K107 50mm, 6 x 1.2x2.4m = 17.28m² £325.76 £390.91
Kingspan Kooltherm K107 60mm, 5 x 1.2x2.4m = 14.4m² £323.34 £388.00
Kingspan Kooltherm K107 70mm, 4 x 1.2x2.4m = 11.52m² £300.55 £360.66
Kingspan Kooltherm K107 75mm, 4 x 1.2x2.4m = 11.52m² £321.17 £385.40
Kingspan Kooltherm K107 80mm, 4 x 1.2x2.4m = 11.52m² £341.54 £409.84
Kingspan Kooltherm K107 100mm, 3 x 1.2x2.4m = 8.64m² £310.86 £373.03
Kingspan Kooltherm K107 120mm, 2 x 1.2x2.4m = 5.76m² £243.52 £292.22
Aluminium Foil Tape 100mm x 50m = 50lm £10.17 £12.20

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
Product Thickness Thermal Resistance kg/m²
Kingspan K107 25mm 25mm 1.32 m²K/W 1.09 kg/m²
Kingspan K107 40mm 40mm 2.11 m²K/W 1.61 kg/m²
Kingspan K107 50mm 50mm 2.63 m²K/W 1.96 kg/m²
Kingspan K107 60mm 60mm 3.16 m²K/W 2.31 kg/m²
Kingspan K107 70mm 70mm 3.68 m²K/W 2.66 kg/m²
Kingspan K107 75mm 75mm 3.95 m²K/W 2.84 kg/m²
Kingspan K107 80mm 80mm 4.21 m²K/W 3.01 kg/m²
Kingspan K107 90mm 90mm 4.74 m²K/W 3.36 kg/m²
Kingspan K107 100mm 100mm 5.26 m²K/W 3.71 kg/m²
Kingspan K107 110mm 110mm 5.79 m²K/W 4.06 kg/m²
Kingspan K107 120mm 120mm 6.32 m²K/W 4.41 kg/m²
Kingspan K107 130mm 130mm 6.84 m²K/W 4.76 kg/m²
Kingspan K107 140mm 140mm 7.37 m²K/W 5.11 kg/m²
Kingspan K107 150mm 150mm 7.89 m²K/W 5.46 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.

Kingspan Videos

How to install insulation between & under rafter, full fill
How to install insulation between & under rafter, partial fill