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 options


Availability Indicators

Kingspan Kooltherm K106 is sent out from depots nationwide and is subject to the Local Depot Delivery minimum order levels and delivery charge thresholds.

Limited stock may be held at some of our larger depots, and thus, available on shorter lead times than the availability rating suggests.

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 may vary.

Wraptite Tape is shipped seperately to site by Fedex and is subject to the Wraptite Tape delivery charges.

  • Generally 1 to 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

Delivery charges will be calculated at check-out. Please visit our Ordering From Us page for further details on minimum order levels and delivery charges. If you have any queries, please do not hesitate to contact me via our Contact Form or on 01903 899 898.

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

Core: Kingspan Kooltherm K106 cavity board is a premium performance rigid thermoset fibre–free phenolic insulant.

Facings: 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

Thickness90mm and 115mm

Product Performance

Thermal Conductivity0.019 W/mK 
Compressive Strength100 kPa at 10% compressionBS EN 826:2013
Nominal Density35 kg/m³ 

Product Variants

ProductThicknessThermal Resistancekg/m²
Kingspan Kooltherm K106 90mm90mm4.70 m²K/W4.93 kg/m²
Kingspan Kooltherm K106 115mm115mm6.05 m²K/W5.93 kg/m²

While we have provided Thermal Resistance values for all thicknesses on the Kingspan Kooltherm K106 datasheet, some thicknesses may not be readily available.