Kingspan Insulation Kooltherm K106 phenolic full fill cavity wall board Celotex Insulation

Kingspan Kooltherm K106

Premium performance rigid Phenolic full-fill cavity wall insulation board, 10mm cavity.

A full-fill option as an alternate to the Kingspan K108 partial fill boards.

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

Used for insulating cavity walls with a 10mm residual cavity up to 25m high.

The water–tight, vapour–open polypropylene fleece outer facing protects against moisture penetration.

Unaffected by air infiltration. Resists moisture penetration by allowing a clear cavity to be maintained.

Boards are designed to fit easily with standard brick and block dimensions.

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: 90mm.

The following thickness is manufactured to order and may have minimum order requirements: 115mm.

Product Information

General information about Kingspan Kooltherm K106

Product Application

External wall insulating board for render systems

Kingspans premium performance 'lower-lambda' value phenolic foam board, Kooltherm K106, is suitable for use in cavity wall applications with a 10mm residual cavity to the outer leaf, for walls up to 25m.

Product Make-up


Kingspan Kooltherm K106 cavity board is a premium performance rigid thermoset fibre–free phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).


Faced with a water-tight, vapour-open polypropylene fleece on the outer facing, while the inner face is a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 90mm to 115mm
Board Length 1.2m
Board Width 0.45m
Board Edge Square

Product Prices

Buy Kingspan Kooltherm K106

Product ex-VAT inc-VAT
Kingspan Kooltherm K106 90mm, 4 x 0.45x1.2m = 2.16m² £84.47 £101.36

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 K106 90mm 90mm 4.74 m²K/W 3.36 kg/m²
Kingspan K106 115mm 115mm 6.05 m²K/W 4.23 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.