Kingspan Kooltherm K103
Premium performance rigid Phenolic floor insulation board
Replaces Kingspan Kooltherm K3.
New lower Lambda Value (Thermal Conductivity) 0.018 W/mK... The most thermally efficient commonly used insulating board.
Used for insulating beam and block, concrete, and timber floors with or without underfloor heating systems.
Faced on both sides with a glass tissue based facing, autohesively bonded to the insulation core during manufacture.
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).
High compressive strength: 120 kPa
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 25mm, 40mm, 50mm, 60mm, 70mm, 75mm and 100mm.
The following thicknesses are manufactured to order and may have minimum order requirements: 80mm, 120mm, 130mm and 140mm.
General information about Kingspan Kooltherm K103
Floor insulating board
Kingspans premium performance 'lower-lambda' value phenolic foam board, Kooltherm K103, is suitable for use in beam and dense block floors, between floor joists, suspended timber ground floors, between and under floor joists, concrete ground based floors, floating ground floors, upgrading concrete slab floors, and garage conversions.
Kingspan Kooltherm K103 floor 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)
Faced on both sides with a glass tissue based facing, autohesively bonded to the insulation core during manufacture
|Thermal Conductivity||0.018 W/m·K|
|Compressive Strength||120 kPa at 10% compression.||BS EN 826: 2013|
|Nominal Density||35 kg/m³|
|Vapour Resistance||> 370 MNs/gm||BS EN 12086: 2013|
Buy Kingspan Kooltherm K103
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 (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.
Generally 1 or 2 days for delivery
Generally 1 to 5 days for delivery
Generally 5 to 10 days for delivery
Generally 5 to 15 days for delivery
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
While we have provided Thermal Resistance values for all thicknesses on the Kingspan K103 datasheet, some thicknesses may not be readily available.
Items highlighted in green are generally held in stock by Kingspan.
|Kingspan K103 25mm||25mm||1.35 m²K/W||1.01 kg/m²|
|Kingspan K103 30mm||30mm||1.65 m²K/W||1.19 kg/m²|
|Kingspan K103 40mm||40mm||2.20 m²K/W||1.54 kg/m²|
|Kingspan K103 50mm||50mm||2.75 m²K/W||1.89 kg/m²|
|Kingspan K103 60mm||60mm||3.30 m²K/W||2.24 kg/m²|
|Kingspan K103 70mm||70mm||3.85 m²K/W||2.59 kg/m²|
|Kingspan K103 75mm||75mm||4.15 m²K/W||2.77 kg/m²|
|Kingspan K103 80mm||80mm||4.40 m²K/W||2.94 kg/m²|
|Kingspan K103 90mm||90mm||5.00 m²K/W||3.29 kg/m²|
|Kingspan K103 100mm||100mm||5.55 m²K/W||3.64 kg/m²|
|Kingspan K103 110mm||110mm||6.00 m²K/W||3.99 kg/m²|
|Kingspan K103 120mm||120mm||6.65 m²K/W||4.34 kg/m²|
|Kingspan K103 130mm||130mm||7.20 m²K/W||4.69 kg/m²|
|Kingspan K103 140mm||140mm||7.75 m²K/W||5.04 kg/m²|
|Kingspan K103 150mm||150mm||8.30 m²K/W||5.39 kg/m²|
Standards & Approval
Kingspan Kooltherm K103 Floorboard is manufactured to the highest standards under a management system certified to ISO 9001: 2015 (Quality Management Systems. Requirements), ISO 14001: 2015 (Environmental Management Systems. Requirements), BS OHSAS 18001: 2007 (Occupational Health and Safety Management Systems. Requirements) and ISO 50001: 2011 (Energy Management Systems. Requirements with guidance for use).
The use of Kingspan Kooltherm K103 Floorboard is covered by BBA Certificate 16/5299.