Kingspan Insulation Kooltherm K107 phenolic pitch roof board Kingspan Insulation

Kingspan Kooltherm K107

Premium performance rigid Phenolic pitched roof board

Replaces Kingspan K7.

New lower Lambda Value (Thermal Conductivity) 0.018 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.

Easy to handle and install. Ideal for new build or refurbishments projects.

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).

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 may apply as we may need to get stock in 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

Core

Kingspan Kooltherm K107 Pitched Roof Board is a premium performance fibre-free rigid thermoset phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)

Facings

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

Thermal Conductivity 0.018 W/m·K W/m·K
Compressive Strength 100 kPa at 10% compression BS EN 826: 2013
Nominal Density 35 kg/m³
Board Length 2.4m
Board Width 1.2m
Board Edge Square

Product Prices

Buy Kingspan Kooltherm K107

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple boards... 8 x 1.2x2.4m = 23.04m² - in this instance, there are 8 x boards in a pack where each board is 1.2m x 2.4m providing a total coverage of 23.04m² per pack.

Rarely requested product sourced directly from manufacturer. Kingspan K107 25mm, 12 x 1.2x2.4m = 34.56m² - ranging from £10.42 to £10.90 per m²

1 x pack @ £10.90 per m² / £31.41 per board = £376.87 (£452.24 inc-VAT) per pack
2 x packs @ £10.81 per m² / £31.13 per board = £373.54 (£448.25 inc-VAT) per pack
3 x packs @ £10.71 per m² / £30.85 per board = £370.20 (£444.24 inc-VAT) per pack
4 x packs @ £10.62 per m² / £30.57 per board = £366.87 (£440.24 inc-VAT) per pack
5 x packs @ £10.52 per m² / £30.29 per board = £363.53 (£436.24 inc-VAT) per pack
6 x packs @ £10.42 per m² / £30.02 per board = £360.20 (£432.24 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 50mm, 6 x 1.2x2.4m = 17.28m² - ranging from £16.15 to £16.89 per m²

1 x pack @ £16.89 per m² / £48.66 per board = £291.93 (£350.32 inc-VAT) per pack
2 x packs @ £16.74 per m² / £48.23 per board = £289.35 (£347.22 inc-VAT) per pack
3 x packs @ £16.59 per m² / £47.79 per board = £286.76 (£344.11 inc-VAT) per pack
4 x packs @ £16.45 per m² / £47.36 per board = £284.18 (£341.02 inc-VAT) per pack
5 x packs @ £16.30 per m² / £46.93 per board = £281.60 (£337.92 inc-VAT) per pack
6 x packs @ £16.15 per m² / £46.50 per board = £279.01 (£334.81 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 60mm, 5 x 1.2x2.4m = 14.4m² - ranging from £21.09 to £22.07 per m²

1 x pack @ £22.07 per m² / £63.56 per board = £317.81 (£381.37 inc-VAT) per pack
2 x packs @ £21.87 per m² / £63.00 per board = £314.99 (£377.99 inc-VAT) per pack
3 x packs @ £21.68 per m² / £62.44 per board = £312.18 (£374.62 inc-VAT) per pack
4 x packs @ £21.48 per m² / £61.87 per board = £309.37 (£371.24 inc-VAT) per pack
5 x packs @ £21.29 per m² / £61.31 per board = £306.56 (£367.87 inc-VAT) per pack
6 x packs @ £21.09 per m² / £60.75 per board = £303.74 (£364.49 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 70mm, 4 x 1.2x2.4m = 11.52m² - ranging from £22.14 to £23.17 per m²

1 x pack @ £23.17 per m² / £66.72 per board = £266.87 (£320.24 inc-VAT) per pack
2 x packs @ £22.96 per m² / £66.13 per board = £264.50 (£317.40 inc-VAT) per pack
3 x packs @ £22.76 per m² / £65.54 per board = £262.14 (£314.57 inc-VAT) per pack
4 x packs @ £22.55 per m² / £64.95 per board = £259.78 (£311.74 inc-VAT) per pack
5 x packs @ £22.35 per m² / £64.36 per board = £257.42 (£308.90 inc-VAT) per pack
6 x packs @ £22.14 per m² / £63.77 per board = £255.06 (£306.07 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 75mm, 4 x 1.2x2.4m = 11.52m² - ranging from £23.63 to £24.72 per m²

1 x pack @ £24.72 per m² / £71.21 per board = £284.83 (£341.80 inc-VAT) per pack
2 x packs @ £24.51 per m² / £70.58 per board = £282.31 (£338.77 inc-VAT) per pack
3 x packs @ £24.29 per m² / £69.95 per board = £279.79 (£335.75 inc-VAT) per pack
4 x packs @ £24.07 per m² / £69.32 per board = £277.27 (£332.72 inc-VAT) per pack
5 x packs @ £23.85 per m² / £68.69 per board = £274.75 (£329.70 inc-VAT) per pack
6 x packs @ £23.63 per m² / £68.06 per board = £272.23 (£326.68 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 80mm, 4 x 1.2x2.4m = 11.52m² - ranging from £24.91 to £26.06 per m²

1 x pack @ £26.06 per m² / £75.05 per board = £300.20 (£360.24 inc-VAT) per pack
2 x packs @ £25.83 per m² / £74.39 per board = £297.54 (£357.05 inc-VAT) per pack
3 x packs @ £25.60 per m² / £73.72 per board = £294.89 (£353.87 inc-VAT) per pack
4 x packs @ £25.37 per m² / £73.06 per board = £292.23 (£350.68 inc-VAT) per pack
5 x packs @ £25.14 per m² / £72.39 per board = £289.57 (£347.48 inc-VAT) per pack
6 x packs @ £24.91 per m² / £71.73 per board = £286.92 (£344.30 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 100mm, 3 x 1.2x2.4m = 8.64m² - ranging from £29.92 to £31.30 per m²

1 plus packs @ £31.30 per m² / £90.15 per board = £270.45 (£324.54 inc-VAT) per pack
3 plus packs @ £31.02 per m² / £89.35 per board = £268.05 (£321.66 inc-VAT) per pack
5 plus packs @ £30.75 per m² / £88.55 per board = £265.66 (£318.79 inc-VAT) per pack
7 plus packs @ £30.47 per m² / £87.76 per board = £263.27 (£315.92 inc-VAT) per pack
9 plus packs @ £30.19 per m² / £86.96 per board = £260.87 (£313.04 inc-VAT) per pack
11 plus packs @ £29.92 per m² / £86.16 per board = £258.48 (£310.18 inc-VAT) per pack

Rarely requested product sourced directly from manufacturer. Kingspan K107 120mm, 2 x 1.2x2.4m = 5.76m² - ranging from £35.50 to £37.15 per m²

1 plus packs @ £37.15 per m² / £106.98 per board = £213.96 (£256.75 inc-VAT) per pack
4 plus packs @ £36.82 per m² / £106.04 per board = £212.07 (£254.48 inc-VAT) per pack
7 plus packs @ £36.49 per m² / £105.09 per board = £210.17 (£252.20 inc-VAT) per pack
10 plus packs @ £36.16 per m² / £104.14 per board = £208.28 (£249.94 inc-VAT) per pack
13 plus packs @ £35.83 per m² / £103.20 per board = £206.39 (£247.67 inc-VAT) per pack
16 plus packs @ £35.50 per m² / £102.25 per board = £204.49 (£245.39 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 K107 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 K107 25mm 25mm 1.35 m²K/W 1.09 kg/m²
Kingspan K107 40mm 40mm 2.20 m²K/W 1.61 kg/m²
Kingspan K107 50mm 50mm 2.75 m²K/W 1.96 kg/m²
Kingspan K107 60mm 60mm 3.30 m²K/W 2.31 kg/m²
Kingspan K107 70mm 70mm 3.85 m²K/W 2.66 kg/m²
Kingspan K107 75mm 75mm 4.15 m²K/W 2.84 kg/m²
Kingspan K107 80mm 80mm 4.40 m²K/W 3.01 kg/m²
Kingspan K107 90mm 90mm 5.00 m²K/W 3.36 kg/m²
Kingspan K107 100mm 100mm 5.55 m²K/W 3.71 kg/m²
Kingspan K107 110mm 110mm 6.10 m²K/W 4.06 kg/m²
Kingspan K107 120mm 120mm 6.65 m²K/W 4.41 kg/m²
Kingspan K107 130mm 130mm 7.20 m²K/W 4.76 kg/m²
Kingspan K107 140mm 140mm 7.75 m²K/W 5.11 kg/m²
Kingspan K107 150mm 150mm 8.30 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

Over Rafter Installation

General guides for Over Rafter
  • A preservative treated stop rail should be secured to the rafters at the eaves.
  • Kingspan Kooltherm K107 Pitched Roof Board may be laid either across or down the line of the rafters and should be laid lightly butted and preferably break bonded.
  • All board joints running from eaves to ridge must occur over rafters.
  • Ensure continuity of insulation at the ridge of the roof.
  • There is no necessity to tape board joints.
  • Over Rafter Installation without Sarking Board
  • Lay 38 x 38 mm treated softwood counter–battens in line with the rafters.
  • Secure the counter–battens to the rafters by fixing through both the counter–battens and the insulation boards.
  • Over Rafter Installation with Slates fixed directly to Sarking Board
  • Overlay the insulation boards with the sarking board.
  • Secure the sarking board and insulation boards to the rafters by fixing through both the sarking board and the insulation.
  • Over Rafter Installation with Sarking Board and Tiles on tiling battens and counter–battens
  • Overlay the insulation boards with the sarking board, and lay 38 x 38 mm treated softwood counter–battens in line with the rafters.
  • Secure the counter–battens to the rafters by fixing through the counter–batten, the sarking board and the insulation.
  • Kingspan K107 Over and Bewteen Rafters
    Kingspan K107 Over and Bewteen Rafters
    Kingspan K107 Over and Bewteen Rafters with Sarking board
    Kingspan K107 Over and Bewteen Rafters with Sarking board

    Between Rafter Installation

    Between Rafter Installations flush to the top surface of rafters
  • If Kingspan Kooltherm K107 Pitched Roof Board is to be installed between and over rafters, the between rafter layer must be flush with the top of the rafters in order to prevent the risk of air movement between the two layers of insulation boards.
  • If the between rafter layer of insulation is to be fitted from the outside, install the insulation with the use of timber ‘stop’ battens.
  • Sarking clips should be the correct size so the insulation is flush with the top surface of the rafters.
  • Push insulation, trimmed to suit rafter spacings, between the rafters so they are flush with the top surface of the rafters.
  • Side-nail treated softwood battens to the rafters to hold the boards in place.
  • Between Rafter Installations flush to the bottom surface of rafters
  • Kingspan Kooltherm K107 Pitched Roof Board installed between rafters must be flush with the bottom of the rafters in order to prevent the risk of air movement between the boards and the ceiling.
  • Where the insulation between rafters is to be flush with the bottom of the rafters but does not fill the full rafter depth, install the insulation, trimmed to suit rafter spacings, with the aid of treated softwood battens nailed to the side of the rafters to provide a ‘stop’ above the insulation.
  • The battens should be in the appropriate position to ensure the insulation is flush with the bottom of the rafters.
  • An additional restraint to the insulation boards can be provided by Kingspan Kooltherm K118 Insulated Plasterboard fixed to the inside face of the rafters.
  • Between Rafter Installations fully filling rafter depth
  • Where the insulation between rafters fully fills the rafter depth simply install the correct thickness of insulation, trimmed to suit rafter spacings, in such a manner that it is flush with the bottom and top of the rafters.
  • Kingspan K107 Between Rafters with Kingspan K118 under rafters
    Kingspan K107 Between Rafters with Kingspan K118 under rafters

    Joist Level Installation

    Between Joists
  • Kingspan Kooltherm K107 Pitched Roof Board installed between joists must be flush with the bottom of the joists in order to prevent the risk of air movement between the boards and the ceiling.
  • Install the correct thickness of insulation, trimmed to suit rafter spacings, in such a manner that it is flush with the bottom of the joists.
  • The insulation must not be used as a weight bearing surface and, if the thickness of insulation exceeds the depth of the joists, batten out the joists such that they stand proud of the insulation.
  • Where there is no over joist insulation, and the loft is to be used for storage, minimum thickness of 9mm plywood / chipboard / OSB should be mechanically fixed over the joists. Where pedestrian access is required, minimum thickness 18mm plywood / chipboard / OSB should be installed instead.
  • Over Joists
  • If Kingspan Kooltherm K107 Pitched Roof Board is to be installed between and over joists, the between joist layer must fully fill the joist depth, so that it is flush with the bottom and the top of the joists, in order to prevent the risk of air movement either above or below the insulation boards. It must not stand proud above the joists, otherwise a gap would be created over the joists themselves.
  • The insulation over joists must be tapered so it fits snugly under rafters at the eaves.
  • The insulation must not be used as a weight bearing surface. If loft storage, or pedestrian access to the loft area, is necessary, it is recommended that one of the following options is adopted.
  • Where the loft is to be used for storage, minimum thickness of 9mm plywood / chipboard / OSB should be mechanically fixed over the joists, with the over joist insulation layer laid on top. Where pedestrian access is required, a further layer of 18mm plywood / chipboard / OSB should also be installed over the insulation boards.
  • A proprietary insulated loft storage, or pedestrian access, board can be installed.
  • Alternatively, treated softwood battens should be laid perpendicular to the joists, at a maximum of 600mm centres, and fixed to them. The depth of the battens should be ≥ to that of the over joist insulation layer. The over joist insulation layer is installed between the battens following the guidance for between joist insulation (above) with a minimum thickness of 18mm plywood / chipboard / OSB mechanically fixed over the battens.
  • Between Dwarf Wall studs
  • Kingspan Kooltherm K107 Pitched Roof Board installed between studs must be flush with the inside surface of the studs and the plasterboard / insulated plasterboard wall finish in order to prevent the risk of air movement between the boards and the plasterboard / insulated plasterboard.
  • Nail treated softwood battens to the side of studs to provide a ‘stop’ and prevent the insulation boards moving within the stud cavity.
  • This ‘stop’ should be positioned such that the insulation boards finish flush with the inside surface of the studs.
  • If the insulation boards are thicker than the timber studs fix appropriately sized treated softwood battens to the back of the studs and fix timber ‘stop’ straps diagonally to the battens in an appropriate pattern to hold the insulation boards in place. Each board must be restrained by a minimum of two diagonal straps.
  • Insulation boards may be temporarily held in place with large headed clout nails fixed through the ‘stop’ battens / straps.
  • The boards will be further restrained by the plasterboard / insulated plasterboard lining fixed to the inside face of the timbers.
  • Kingspan K107 Between and Over Joists / Dwarf Wall
    Kingspan Kingspan K107 Between and Over Joists / Dwarf Wall
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here