Kingspan Insulation Kooltherm K106 phenolic full fill cavity wall board Kingspan 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) 0.018 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 thicknesses are manufactured to order and may have minimum order requirements: 40mm, 45mm, 50mm, 55mm, 60mm, 70mm, 75mm, 80mm, 100mm, 110mm, 115mm, and 120mm; these may carry minimum order levels.

Product Information

General information about Kingspan Kooltherm K106

Product Application

Cavity wall, with 10mm residual cavity, insulating board

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

Thermal Conductivity 0.018 W/m·K
Compressive Strength 100 kPa at 10% compression. BS EN 826: 2013
Nominal Density 35 kg/m³
Board Length 1.2m
Board Width 0.45m
Board Edge Square

Product Prices

Buy Kingspan Kooltherm K106

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple boards... 4 x 0.45x1.2m = 2.16m² - in this instance, there are 4 x boards in a pack where each board is 0.45m x 1.2m providing a total coverage of 2.16m² per pack.

Rarely requested product sourced directly from manufacturer. Kingspan K106 90mm, 4 x 0.45x1.2m = 2.16m² - ranging from £32.50 to £34.00 per m²

1 plus packs @ £34.00 per m² / £18.36 per board = £73.45 (£88.14 inc-VAT) per pack
4 plus packs @ £33.70 per m² / £18.20 per board = £72.80 (£87.36 inc-VAT) per pack
7 plus packs @ £33.40 per m² / £18.04 per board = £72.15 (£86.58 inc-VAT) per pack
10 plus packs @ £33.10 per m² / £17.88 per board = £71.50 (£85.80 inc-VAT) per pack
13 plus packs @ £32.80 per m² / £17.71 per board = £70.85 (£85.02 inc-VAT) per pack
16 plus packs @ £32.50 per m² / £17.55 per board = £70.20 (£84.24 inc-VAT) per pack

Products need to be brought in from Kingspan, please allow approx. 1 week for delivery on stocked items (highlighted in green below in the properties section) 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.

Please observe the 'Star Rating' indicators to assess availability.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined 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 Certification, Downloads, and Installation Guides

Thermal Resistance

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

Items highlighted in green are generally held in stock by Kingspan.

Product Thickness Thermal Resistance kg/m²
Kingspan K106 50mm 50mm 2.75 m²K/W 1.96 kg/m²
Kingspan K106 80mm 80mm 4.40 m²K/W 3.01 kg/m²
Kingspan K106 90mm 90mm 5.00 m²K/W 3.36 kg/m²
Kingspan K106 100mm 100mm 5.55 m²K/W 3.71 kg/m²
Kingspan K106 115mm 115mm 6.35 m²K/W 4.23 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.

Kingspan Videos

How to install cavity wall insulation with a 10mm residual cavity

Cavity Wall (Full Fill)

Residual Cavity
  • A 10 mm residual cavity width is recommended between the insulation and the outer leaf for wall heights up to 25 meters.
  • Installation with Solid Concrete floors
  • The first row of wall ties are installed in the inner leaf at 600 mm horizontal centres a minimum of one course of blockwork below the damp proof course, or 150 mm (for the UK) and 225 mm (for Ireland) below the top surface of the ground floor perimeter insulation upstand, whichever is the lower.
  • Installation with Suspended timber floors
  • Kingspan Kooltherm K106 Cavity Board is normally held in position by the wall ties used to tie the two skins of masonry together.
  • Wall ties should include a retaining disc / clip of a thickness no greater than 10 mm.
  • Continue constructing the inner leaf up to the next wall tie course (450 mm above the rst – usually 2 block courses).
  • The next course of wall ties is positioned at the usual 900 mm horizontal centres in the UK and 750 mm horizontal centres in Ireland.
  • The next course of blockwork is installed to secure the ties.
  • The first row of insulation boards should now be installed between the two rows of wall ties, ensuring each insulation board is retained tight against the inner leaf and joints are lightly butted.
  • Each board should be secured at a minimum of three points. Additional ties may also be required to satisfy the structural requirements of BS EN 845-1: 2013, BS EN 1996-1-1: 2005, BS EN 1996-2: 2006, BS EN 1996-3: 2006, PD 6697: 2010 and / or to ensure adequate retention of boards or cut pieces.
  • A self–adhesive breathable tape, no less than 100 mm wide, should be applied to all horizontal and vertical joints, board edges and abutting junction interfaces.
  • The tape should be applied in a smooth and wrinkle–free manner and should extend no less than 50 mm either side of joints, board edges and abutting junction interfaces. If necessary, additional layers of tape may be applied. The seal must be maintained at protrusion locations e.g. wall ties.
  • To ensure successful adhesion, all surfaces to receive tape should be made clean, dry and free from grease, dust, dirt and all other foreign matter prior to application. A gentle pressure may also be exerted during application.
  • The outer leaf is then built up to the level of the top of the boards and the process is repeated.
  • When insulating a gable, insulation boards should be continued 200 mm beyond the height of the top story ceiling and a cavity tray installed above the insulation.
  • Excess Mortar
  • After raising each section of inner leaf, before installation of the insulation board, excess mortar should be removed and mortar droppings cleaned from exposed edges of the installed insulation boards.
  • Use of a cavity batten or cavity board is recommended to protect board edges and maintain a clear cavity.
  • Kingspan K106 Brick and Block with concrete floor
    Kingspan K106 Brick and Block with concrete floor
    Kingspan K106 Brick and Block with suspended floor
    Kingspan K106 Brick and Block with suspended floor
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here