Kingspan Insulation Kooltherm K118 phenolic thermal laminate board Kingspan Insulation

Kingspan Kooltherm K118

Premium performance rigid Phenolic insulated plasterboard

Replaces Kingspan Kooltherm K17 and K18.

New lower Lambda Value (Thermal Conductivity) 0.018 W/mK... The most thermally efficient commonly used insulating board.

Insulation, dry–lining and vapour control in one board.

Easy to handle and quick to install.

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).

Suitable for both mechancial fixing and dot & dab adhesive bonding.

Ideal for new build, retrofit, and refurbishment.

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 thicknesses: 32.5mm, 37.5mm, 42.5mm, 52.5mm, 62.5mm and 72.5mm.

The following thicknesses are manufactured to order and may have minimum order requirements: 57.5mm, 67.5mm, 82.5mm, 87.5mm, 92.5mm, 102.5mm, 112.5mm and 122.5mm.


Product Information

General information about Kingspan Kooltherm K118

Product Application

Dr-lining thermal laminate board

Kingspans premium performance 'lower-lambda' value phenolic foam board bonded to 12.5mm plasterboard, Kooltherm K118, is suitable for use in wall applications where it is mechanically fixed to timber frames or steel wall linings as well as adhesive bonded (dot and dab) to brick, block, or concrete walls.

Product Make-up

Core

The core of Kingspan Kooltherm K118 Insulated Plasterboard 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 with a 12.5mm tapered edge gypsum based plasterboard on the front facing while the hidden face is a perforated low emissivity composite foil, autohesively bonded to the insulation core during manufacture

Product Properties

Thermal Conductivity 0.018 W/m·K 0.19 W/m·K for the plasterboard
Compressive Strength 100 kPa at 10% compression BS EN 826: 2013
Board Length 2.4m
Board Width 1.2m
Board Edge Square / Tapered edge plasterboard
Vapour Resistance > 100 MNs/gm BS EN 12086: 1997 / I.S. EN 12086: 1998

Product Prices

Buy Kingspan Kooltherm K118

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple boards... 24 x 1.2x2.4m = 69.12m² - in this instance, there are 24 x boards in a pack where each board is 1.2m x 2.4m providing a total coverage of 69.12m² per pack.

Rarely requested product sourced directly from manufacturer. Kingspan K118 20mm (20+12.5mm), 24 x 1.2x2.4m = 69.12m² - ranging from £16.45 to £17.21 per m²

1 x pallet @ £17.21 per m² / £49.57 per board = £1189.56 (£1427.47 inc-VAT) per pallet
2 x pallets @ £17.06 per m² / £49.13 per board = £1179.03 (£1414.84 inc-VAT) per pallet
3 x pallets @ £16.91 per m² / £48.69 per board = £1168.50 (£1402.20 inc-VAT) per pallet
4 x pallets @ £16.75 per m² / £48.25 per board = £1157.97 (£1389.56 inc-VAT) per pallet
5 x pallets @ £16.60 per m² / £47.81 per board = £1147.45 (£1376.94 inc-VAT) per pallet
6 x pallets @ £16.45 per m² / £47.37 per board = £1136.92 (£1364.30 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 25mm (25+12.5mm), 21 x 1.2x2.4m = 60.48m² - ranging from £18.50 to £19.36 per m²

1 x pallet @ £19.36 per m² / £55.75 per board = £1170.72 (£1404.86 inc-VAT) per pallet
2 x pallets @ £19.19 per m² / £55.26 per board = £1160.36 (£1392.43 inc-VAT) per pallet
3 x pallets @ £19.01 per m² / £54.76 per board = £1150.00 (£1380.00 inc-VAT) per pallet
4 x pallets @ £18.84 per m² / £54.27 per board = £1139.64 (£1367.57 inc-VAT) per pallet
5 x pallets @ £18.67 per m² / £53.78 per board = £1129.28 (£1355.14 inc-VAT) per pallet
6 x pallets @ £18.50 per m² / £53.28 per board = £1118.92 (£1342.70 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 30mm (30+12.5mm), 18 x 1.2x2.4m = 51.84m² - ranging from £19.09 to £19.98 per m²

1 x pallet @ £19.98 per m² / £57.54 per board = £1035.70 (£1242.84 inc-VAT) per pallet
2 x pallets @ £19.80 per m² / £57.03 per board = £1026.53 (£1231.84 inc-VAT) per pallet
3 x pallets @ £19.63 per m² / £56.52 per board = £1017.36 (£1220.83 inc-VAT) per pallet
4 x pallets @ £19.45 per m² / £56.01 per board = £1008.20 (£1209.84 inc-VAT) per pallet
5 x pallets @ £19.27 per m² / £55.50 per board = £999.03 (£1198.84 inc-VAT) per pallet
6 x pallets @ £19.09 per m² / £54.99 per board = £989.87 (£1187.84 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 40mm (40+12.5mm), 15 x 1.2x2.4m = 43.2m² - ranging from £20.30 to £21.24 per m²

1 x pallet @ £21.24 per m² / £61.18 per board = £917.75 (£1101.30 inc-VAT) per pallet
2 x pallets @ £21.06 per m² / £60.64 per board = £909.62 (£1091.54 inc-VAT) per pallet
3 x pallets @ £20.87 per m² / £60.10 per board = £901.50 (£1081.80 inc-VAT) per pallet
4 x pallets @ £20.68 per m² / £59.56 per board = £893.38 (£1072.06 inc-VAT) per pallet
5 x pallets @ £20.49 per m² / £59.02 per board = £885.26 (£1062.31 inc-VAT) per pallet
6 x pallets @ £20.30 per m² / £58.48 per board = £877.14 (£1052.57 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 45mm (45+12.5mm), 14 x 1.2x2.4m = 40.32m² - ranging from £21.14 to £22.11 per m²

1 x pallet @ £22.11 per m² / £63.69 per board = £891.65 (£1069.98 inc-VAT) per pallet
2 x pallets @ £21.92 per m² / £63.13 per board = £883.76 (£1060.51 inc-VAT) per pallet
3 x pallets @ £21.72 per m² / £62.56 per board = £875.87 (£1051.04 inc-VAT) per pallet
4 x pallets @ £21.53 per m² / £62.00 per board = £867.98 (£1041.58 inc-VAT) per pallet
5 x pallets @ £21.33 per m² / £61.44 per board = £860.09 (£1032.11 inc-VAT) per pallet
6 x pallets @ £21.14 per m² / £60.87 per board = £852.20 (£1022.64 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 50mm (50+12.5mm), 12 x 1.2x2.4m = 34.56m² - ranging from £23.18 to £24.25 per m²

1 x pallet @ £24.25 per m² / £69.84 per board = £838.08 (£1005.70 inc-VAT) per pallet
2 x pallets @ £24.04 per m² / £69.22 per board = £830.66 (£996.79 inc-VAT) per pallet
3 x pallets @ £23.82 per m² / £68.60 per board = £823.25 (£987.90 inc-VAT) per pallet
4 x pallets @ £23.61 per m² / £67.99 per board = £815.83 (£979.00 inc-VAT) per pallet
5 x pallets @ £23.39 per m² / £67.37 per board = £808.41 (£970.09 inc-VAT) per pallet
6 x pallets @ £23.18 per m² / £66.75 per board = £801.00 (£961.20 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Kingspan K118 60mm (60+12.5mm), 11 x 1.2x2.4m = 31.68m² - ranging from £24.35 to £25.48 per m²

1 x pallet @ £25.48 per m² / £73.39 per board = £807.27 (£968.72 inc-VAT) per pallet
2 x pallets @ £25.26 per m² / £72.74 per board = £800.12 (£960.14 inc-VAT) per pallet
3 x pallets @ £25.03 per m² / £72.09 per board = £792.98 (£951.58 inc-VAT) per pallet
4 x pallets @ £24.81 per m² / £71.44 per board = £785.83 (£943.00 inc-VAT) per pallet
5 x pallets @ £24.58 per m² / £70.79 per board = £778.69 (£934.43 inc-VAT) per pallet
6 x pallets @ £24.35 per m² / £70.14 per board = £771.55 (£925.86 inc-VAT) per pallet

Limited stock of the most popular boards sizes may be held at some of our larger depots.

Kingspan K118 is generally only sold in pallet quantities, however, on occassion some depots may split the pallets.

Where 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 K118 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 K118 32.5mm 32.5mm 1.15 m²K/W 11.43 kg/m²
Kingspan K118 37.5mm 37.5mm 1.45 m²K/W 11.57 kg/m²
Kingspan K118 42.5mm 42.5mm 1.70 m²K/W 11.87 kg/m²
Kingspan K118 52.5mm 52.5mm 2.25 m²K/W 12.21 kg/m²
Kingspan K118 57.5mm 57.5mm 2.55 m²K/W 12.41 kg/m²
Kingspan K118 62.5mm 62.5mm 2.80 m²K/W 12.91 kg/m²
Kingspan K118 72.5mm 72.5mm 3.35 m²K/W 13.25 kg/m²
Kingspan K118 82.5mm 82.5mm 3.95 m²K/W 13.81 kg/m²
Kingspan K118 92.5mm 92.5mm 4.50 m²K/W 14.21 kg/m²

Standards & Approval

Product Certificates

Please visit the Kingspan website for product certificates.

Kingspan Videos

How to install insulated plasterboard, adhesive bonded
How to install insulated plasterboard, mechanically fixed to battens

Mechanically Fixed

To Timber Framing Studs or Battens specific
  • This method may be used on timber frame constructions or on dry, stable constructions capable of supporting battens and associated fixings. Timber battens can be packed out using proprietary shims to correct alignment and provide a space to accommodate services.
  • Guidelines should be marked out at maximum 600 mm centres to indicate the positioning of the vertical battens.
  • Vertical timber framing studs / battens should be set at maximum 600 mm horizontal centres, around the perimeter of the walls, at floor and ceiling, and around any openings and services which penetrate the system.
  • If fixing to battens, they should be mechanically fixed to the wall, and comprise 25 x 47 mm (min.) treated softwood, backed with a strip of damp proof course (DPC).
  • Each sheet of Kingspan Kooltherm K118 should lap timber framing studs / battens / noggins by 19 mm (min.) at sheet joints.
  • Battens should be fixed approximately 75 mm from the ends of each timber batten and positioned at a maximum 600 mm apart.
  • Where joints between sheets of insulated plasterboard are unsupported by the timber framing studs / battens, timber noggins should be installed.
  • Each sheet of insulated plasterboard should be lightly butted, with fixings located no less than 10 mm from the bound edges of the sheet.
  • Kingspan Kooltherm K118 should be cut approximately 5 mm short of the floor to ceiling height.
  • Sheets of Kingspan Kooltherm K118 should be located centrally over the timber studs / battens and fixed using either drywall screws at 300 mm centres (or 200 mm at external corners), or large headed galvanised clout nails at 150 mm centres. Each sheet of insulated plasterboard should be lightly butted.
  • When installing sheets onto timber, fixings should be long enough to allow minimum 25 mm penetration of the timber frame or minimum 22.5 mm penetration of the the timber battens. Fixings should not penetrate through the battens.
  • To Metal Wall Liner Systems
  • This method may be used on any dry, stable constructions capable of supporting the stand-off brackets, tracks and associated fixings. It can be used to correct substantial substrate irregularities, or where a larger cavity is required to accommodate services.
  • Because metal framing systems are proprietary, sitework guidance should be sought from the framing system manufacturer.
  • However, in the absence of any other guidance, the instructions laid out below may be followed.
  • The maximum undulation on the wall or service protrusion should be measured to determine the required cavity depth.
  • Guidelines should be marked out on the floor and ceiling to indicate where the metal tracks will be positioned.
  • The metal tracks should be fixed to the floor, ceilingand perimeters at a maximum of 600 mm centres using appropriate fixings for the proprietary system.
  • Vertical guidelines should be marked out on the wall at a maximum 600 mm centres to indicate the position of the lining channels. Horizontal marks should also be made at 800 - 900 mm vertical centres (see manufacturers details for specific dimensions) to indicate the fixing points for the individual stand-off brackets. Brackets should be fixed using appropriate fixings.
  • The lining channels should be fitted and fixed into the metal tracks at ceiling and floor level at a maximum of 600 mm centres, in line with the stand-off bracket positions, using appropriate fixings for the proprietary system, extending if required.
  • Bracket legs on the stand-off brackets should be bent forward. Screws should then be inserted through holes in the brackets and fixed to the lining channels using appropriate fixings, such as 13 mm wafer headed drywall screws or jack point screws. Bracket legs can then be bent back to sit clear of the channel face.
  • At internal angles or corner, a lining channel or track should be positioned tight into the corner to provide support for the lining.
  • Fixing straps or fixing T’s should be used to secure unsupported board joints. Metal channels or tracks should also be positioned around the perimeter of openings to support the board.
  • Kingspan Kooltherm K118 should be cut approximately 5 mm short of the floor to ceiling height.
  • Kingspan Kooltherm K118 should be located centrally over the metal lining channels and fixed using self-tapping drywall screws at 300 mm centres (or 200 mm at external corners). Each sheet of insulated plasterboard should be lightly butted.
  • To Timber Joists or Rafters
  • Kingspan Kooltherm K118 may be used to line ceilings.Minor irregularities of the substrate can be corrected within the dab depth. Typically, gypsum based adhesive should be applied in dabs of 10 - 25 mm thickness, therefore the existing substrate should not exceed a 15 mm tolerance from the high spot of the background to either end of the wall.
  • Sheets must always be placed with the long edge running across the joists or rafters, and all edges must be supported.
  • Where joints between sheets of insulated plasterboard are unsupported by the timber joists / rafters, timber noggins should be installed.
  • Each sheet of insulated plasterboard should lap joists / rafters / noggins by 19 mm (min.) at sheet joints.
  • Sheets should be fixed using either drywall screws at 230 mm centres, or large-headed galvanized clout nails placed at 150 mm centres.
  • Each sheet of insulated plasterboard should be lightly butted, with fixings located no less than 10 mm from the bound edges of the sheet. Fixings should be long enough to allow a minimum 25 mm penetration of the timber
  • General guides Mechanical Fixing
  • Fixings should be driven straight, with the heads embedded just below the surface of the plasterboard.
  • Care should be taken not to overdrive screws.
  • The perimeter of the Kingspan Kooltherm K118 and the 5 mm clearance gap at the base of the wall should be sealed with a flexible sealant or equivalent.
  • Kingspan K118 Mechanically fixed to Brick Wall
    Kingspan K118 Mechanically fixed to Brick Wall

    Adhesive Bonding

    Drywall Adhesive Dab Bonding specific
  • Drywall adhesive dab bonding must always be used in conjunction with a bonding agent applied to the foil facer, as per the following sitework instructions.
  • This method is suitable for use on brick, block or concrete cavity or rendered solid walls, which are dry, stable and free from moisture penetration.
  • This method is not suitable for use directly on non- rendered solid masonry walls where there is a risk of moisture penetration, or on timber or steel frame construction.
  • The cavity formed by the dabs can be used to incorporate services less than 25 mm in depth. Alternatively, minimum chasing of the background will be required.
  • Minor irregularities of the substrate can be corrected within the dab depth. Typically, gypsum based adhesive should be applied in dabs of 10 - 25 mm thickness, therefore the existing substrate should not exceed a 15 mm tolerance from the high spot of the background to either end of the wall.
  • A bonding agent may be required on the substrate to reduce suction or improve mechanical key. This should be applied in continuous bands to correspond with the drywall adhesive dab or band locations.
  • Where Kingspan Kooltherm K118 is used with gypsum based adhesive dabs, the foil facer must first also be primed with a generous coat of bonding agent.
  • A total distance of 10 mm plus the thickness of the Kingspan Kooltherm K118 should be allowed for from the wall’s high point. A line should then be drawn across the floor. This should be plumbed for alignment before transferring the line to the ceiling and extending the line to the room corners. Guidelines should also be marked out vertically on the walls at 1,200 mm horizontal centres to indicate where the edges of the Kingspan Kooltherm K118 should finish.
  • There are many suitable adhesives that can be used. Note that if a gypsum based drywall adhesive is to be used, the foil facer of Kingspan Kooltherm K118 must be primed with a bonding agent first. Once the bonding agent has set, appropriate fixings must then be installed. Please see Table 1 for details.
  • The drywall adhesive should be appropriate for use on the intended masonry substrate. Advice should be sought from the drywall adhesive manufacturer for its recommended system.
  • Kingspan Kooltherm K118 should be cut approximately 15 mm short of the floor to ceiling height.
  • All gypsum / drywall based adhesives will require an additional bonding agent to be applied to the insulation (see Table 1). Suitable bonding agents such as Thistle Bond-It or PVAc should be used. PVAc bonding agents should conform to BS 5270-1: 1989 (Bonding agents for use with gypsum plasters and cement. Specification for polyvinyl acetate (PVAC) emulsion bonding agents for indoor use with gypsum building plasters).
  • A generous coat of bonding agent must be applied when using gypsum / drywall based adhesives. The bonding agent should be applied onto the surface of the foil. A 9 inch / 225 mm standard paint roller should be used to roll bonding agent (going around the foil, back and forth 2-3 times in one application), ensuring a generous amount of bonding agent is applied around the perimeter and down the centre of the boards (to coincide with the positioning of the dabs of adhesive).
  • A continuous band of drywall adhesive is applied around the perimeter of each wall and around any openings or services, in order to support the insulation board edges and act as a fire stop / cavity barrier if required.
  • The adhesive adjacent to the board joints should be applied approximately 25 mm in from the edge of the boards to avoid bridging the joint.
  • Adhesive dabs are generally applied to the background in three vertical rows, but a minimum of 20% of the insulated plasterboard area should be covered with adhesive. Each drywall adhesive dab should be 50 to 75 mm wide and approximately 250 mm long, positioned vertically at approximately 300 mm centres and horizontally at 600 mm centres.
  • Fixings should be long enough to allow minimum 25 mm penetration into the fair faced masonry.
  • Acrylic Sealant / PU Foam Adhesive Bonding specific
  • This method is suitable for use on flat brick, block or concrete cavity or rendered solid walls, which are dry, stable and free from moisture penetration.
  • This method is also suitable for use on linings such as lath and plaster, plaster or plasterboard, providing the existing structure is dry, stable and free from moisture penetration.
  • This method is not suitable for use directly on non- rendered solid masonry walls where there is a risk of moisture penetration.
  • In order to provide sufficient space for services, the background will need to be chased out, unless the services exist within the wall or are contained within the lining framework cavity. Existing services should be assessed to determine any alterations that may need to be made, for example relocating sockets and switches.
  • The existing substrate should be within a 5 mm tolerance when measured with a 2,000 mm straight edge. A total distance of 2-3 mm plus the thickness of the Kingspan Kooltherm K118 should be allowed for from the wall’s high point. A line should then be drawn across the floor. This should be plumbed for alignment before transferring the line to the ceiling and extending the line to the room corners.
  • Guidelines should be marked out on the walls at 1,200 mm horizontal centres to indicate where the edges of Kingspan Kooltherm K118 should finish.
  • Kingspan Kooltherm K118 should be cut approximately 15 mm short of the floor to ceiling height.
  • Acrylic sealant adhesive should be gun-applied to the wall or back of the board in blobs at 300 mm centres, horizontally and vertically.
  • PU foam adhesive should be gun-applied to the wall or back of the board in continuous beads 20 - 25 mm wide. A minimum of 3 vertical beads should be applied per board (unless otherwise stated by the PU foam adhesive manufacturer). A continuous bead of PU foam adhesive should also be applied horizontally at the top and the bottom of the board.
  • The adhesive adjacent to the board joints should be applied approximately 25 mm in from the edge of the boards to avoid bridging the joint.
  • The boards should be lifted tight to the ceiling using a foot-lifter and supported by the packing strips until the adhesive sets. If the wall height exceeds 2,400 mm, start from the bottom of the wall, working upwards, to allow boards to be held on the lower level of the wall and prevent any boards from sliding down.
  • The boards should then be tapped back to align with the predetermined guidelines on the floor and ceiling. The use of a spirit level is recommended to provide a vertical plumb finish.
  • Once the adhesive has set, appropriate secondary fixings should be used in addition to the adhesive.
  • These are normally applied at a rate of 2 No. per sheet, 15 mm in from the edge of the sheet, after the adhesive has set.
  • It is recommended that appropriate secondary fixings are positioned in the tapered edge of the sheets so that they are covered when the board is finished (e.g. joints taped and 3 mm skim coating).
  • Fixings should be long enough to allow minimum 25mm penetration into the masonry (excluding plaster). If a lining exists, fixings should be long enough to allow minimum 25 mm into the timber or 10 mm into the metal framework (excluding plasterboard or lath and plaster).
  • General guides for Adhesive Bonding
  • Fixings should be driven straight, with the heads embedded just below the surface of the plasterboard.
  • Care should be taken not to overdrive screws.
  • Any narrow gaps between a joist and perimeter wall should be insulated by specially cut pieces of board which in turn should be supported on blocks nailed to the underside of the joists. Gaps less than 25 mm wide should be filled with expanding urethane sealant.
  • The perimeter of the Kingspan Kooltherm K118 should be sealed. The 15 mm clearance gap at the base of the wall should be sealed with a combination of flexible polyurethane foam and flexible sealant or equivalent.
  • Kingspan K118 Dot & Dab Solid Block Wall
    Kingspan K118 Solid Block wall, bonded with dry wall adhesive
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here